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1.
Behav Brain Funct ; 20(1): 11, 2024 May 09.
Artículo en Inglés | MEDLINE | ID: mdl-38724963

RESUMEN

Procrastination is universally acknowledged as a problematic behavior with wide-ranging consequences impacting various facets of individuals' lives, including academic achievement, social accomplishments, and mental health. Although previous research has indicated that future self-continuity is robustly negatively correlated with procrastination, it remains unknown about the neural mechanisms underlying the impact of future self-continuity on procrastination. To address this issue, we employed a free construction approach to collect individuals' episodic future thinking (EFT) thoughts regarding specific procrastination tasks. Next, we conducted voxel-based morphometry (VBM) and resting-state functional connectivity (RSFC) analysis to explore the neural substrates underlying future self-continuity. Behavior results revealed that future self-continuity was significantly negatively correlated with procrastination, and positively correlated with anticipated positive outcome. The VBM analysis showed a positive association between future self-continuity and gray matter volumes in the right ventromedial prefrontal cortex (vmPFC). Furthermore, the RSFC results indicated that the functional connectivity between the right vmPFC and the left inferior parietal lobule (IPL) was positively correlated with future self-continuity. More importantly, the mediation analysis demonstrated that anticipated positive outcome can completely mediate the relationship between the vmPFC-IPL functional connectivity and procrastination. These findings suggested that vmPFC-IPL functional connectivity might prompt anticipated positive outcome about the task and thereby reduce procrastination, which provides a new perspective to understand the relationship between future self-continuity and procrastination.


Asunto(s)
Imagen por Resonancia Magnética , Lóbulo Parietal , Corteza Prefrontal , Procrastinación , Humanos , Procrastinación/fisiología , Masculino , Femenino , Imagen por Resonancia Magnética/métodos , Adulto Joven , Adulto , Corteza Prefrontal/fisiología , Corteza Prefrontal/diagnóstico por imagen , Lóbulo Parietal/fisiología , Lóbulo Parietal/diagnóstico por imagen , Mapeo Encefálico/métodos , Vías Nerviosas/fisiología , Adolescente , Red Nerviosa/diagnóstico por imagen , Red Nerviosa/fisiología , Pensamiento/fisiología
2.
Elife ; 122024 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-38747563

RESUMEN

Midbrain dopamine neurons impact neural processing in the prefrontal cortex (PFC) through mesocortical projections. However, the signals conveyed by dopamine projections to the PFC remain unclear, particularly at the single-axon level. Here, we investigated dopaminergic axonal activity in the medial PFC (mPFC) during reward and aversive processing. By optimizing microprism-mediated two-photon calcium imaging of dopamine axon terminals, we found diverse activity in dopamine axons responsive to both reward and aversive stimuli. Some axons exhibited a preference for reward, while others favored aversive stimuli, and there was a strong bias for the latter at the population level. Long-term longitudinal imaging revealed that the preference was maintained in reward- and aversive-preferring axons throughout classical conditioning in which rewarding and aversive stimuli were paired with preceding auditory cues. However, as mice learned to discriminate reward or aversive cues, a cue activity preference gradually developed only in aversive-preferring axons. We inferred the trial-by-trial cue discrimination based on machine learning using anticipatory licking or facial expressions, and found that successful discrimination was accompanied by sharper selectivity for the aversive cue in aversive-preferring axons. Our findings indicate that a group of mesocortical dopamine axons encodes aversive-related signals, which are modulated by both classical conditioning across days and trial-by-trial discrimination within a day.


Asunto(s)
Axones , Condicionamiento Clásico , Neuronas Dopaminérgicas , Corteza Prefrontal , Animales , Corteza Prefrontal/fisiología , Ratones , Axones/fisiología , Condicionamiento Clásico/fisiología , Neuronas Dopaminérgicas/fisiología , Masculino , Recompensa , Dopamina/metabolismo , Ratones Endogámicos C57BL , Señales (Psicología)
3.
PLoS One ; 19(5): e0303144, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38718035

RESUMEN

Charitable fundraising increasingly relies on online crowdfunding platforms. Project images of charitable crowdfunding use emotional appeals to promote helping behavior. Negative emotions are commonly used to motivate helping behavior because the image of a happy child may not motivate donors to donate as willingly. However, some research has found that happy images can be more beneficial. These contradictory results suggest that the emotional valence of project imagery and how fundraisers frame project images effectively remain debatable. Thus, we compared and analyzed brain activation differences in the prefrontal cortex governing human emotions depending on donation decisions using functional near-infrared spectroscopy, a neuroimaging device. We advance existing theory on charitable behavior by demonstrating that little correlation exists in donation intentions and brain activity between negative and positive project images, which is consistent with survey results on donation intentions by victim image. We also discovered quantitative brain hemodynamic signal variations between donors and nondonors, which can predict and detect donor mental brain functioning using functional connectivity, that is, the statistical dependence between the time series of electrophysiological activity and oxygenated hemodynamic levels in the prefrontal cortex. These findings are critical in developing future marketing strategies for online charitable crowdfunding platforms, especially project images.


Asunto(s)
Emociones , Obtención de Fondos , Espectroscopía Infrarroja Corta , Humanos , Emociones/fisiología , Espectroscopía Infrarroja Corta/métodos , Obtención de Fondos/métodos , Femenino , Masculino , Adulto , Organizaciones de Beneficencia , Corteza Prefrontal/fisiología , Corteza Prefrontal/diagnóstico por imagen , Intención , Adulto Joven , Mapeo Encefálico/métodos , Colaboración de las Masas , Encéfalo/fisiología , Encéfalo/diagnóstico por imagen
4.
Sci Rep ; 14(1): 10141, 2024 05 02.
Artículo en Inglés | MEDLINE | ID: mdl-38698131

RESUMEN

Metacognition includes the ability to refer to one's own cognitive states, such as confidence, and adaptively control behavior based on this information. This ability is thought to allow us to predictably control our behavior without external feedback, for example, even before we take action. Many studies have suggested that metacognition requires a brain-wide network of multiple brain regions. However, the modulation of effective connectivity within this network during metacognitive tasks remains unclear. This study focused on medial prefrontal regions, which have recently been suggested to be particularly involved in metacognition. We examined whether modulation of effective connectivity specific to metacognitive behavioral control is observed using model-based network analysis and dynamic causal modeling (DCM). The results showed that negative modulation from the ventral medial prefrontal cortex to the dorsal medial prefrontal cortex was observed in situations that required metacognitive behavioral control but not in situations that did not require such metacognitive control. Furthermore, this modulation was particularly pronounced in the group of participants who could better use metacognition for behavioral control. These results imply hierarchical properties of metacognition-related brain networks.


Asunto(s)
Memoria , Metacognición , Corteza Prefrontal , Corteza Prefrontal/fisiología , Humanos , Masculino , Metacognición/fisiología , Femenino , Memoria/fisiología , Adulto Joven , Adulto , Imagen por Resonancia Magnética , Mapeo Encefálico , Control de la Conducta/métodos , Control de la Conducta/psicología
5.
Sci Rep ; 14(1): 10087, 2024 05 02.
Artículo en Inglés | MEDLINE | ID: mdl-38698192

RESUMEN

Detrimental decision-making is a major problem among violent offenders. Non-invasive brain stimulation offers a promising method to directly influence decision-making and has already been shown to modulate risk-taking in non-violent controls. We hypothesize that anodal transcranial direct current stimulation (tDCS) over the right dorsolateral prefrontal cortex beneficially modulates the neural and behavioral correlates of risk-taking in a sample of violent offenders. We expect offenders to show more risky decision-making than non-violent controls and that prefrontal tDCS will induce stronger changes in the offender group. In the current study, 22 male violent offenders and 24 male non-violent controls took part in a randomized double-blind sham-controlled cross-over study applying tDCS over the right dorsolateral prefrontal cortex. Subsequently, participants performed the Balloon Analogue Risk Task (BART) during functional magnetic resonance imaging (fMRI). Violent offenders showed significantly less optimal decision-making compared to non-violent controls. Active tDCS increased prefrontal activity and improved decision-making only in violent offenders but not in the control group. Also, in offenders only, prefrontal tDCS influenced functional connectivity between the stimulated area and other brain regions such as the thalamus. These results suggest baseline dependent effects of tDCS and pave the way for treatment options of disadvantageous decision-making behavior in this population.


Asunto(s)
Criminales , Toma de Decisiones , Imagen por Resonancia Magnética , Corteza Prefrontal , Asunción de Riesgos , Estimulación Transcraneal de Corriente Directa , Violencia , Humanos , Masculino , Estimulación Transcraneal de Corriente Directa/métodos , Adulto , Criminales/psicología , Toma de Decisiones/fisiología , Violencia/psicología , Corteza Prefrontal/fisiología , Corteza Prefrontal/diagnóstico por imagen , Método Doble Ciego , Adulto Joven , Estudios Cruzados , Corteza Prefontal Dorsolateral/fisiología
7.
Commun Biol ; 7(1): 517, 2024 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-38693344

RESUMEN

How does the human brain construct cognitive maps for decision-making and inference? Here, we conduct an fMRI study on a navigation task in multidimensional abstract spaces. Using a deep neural network model, we assess learning levels and categorized paths into exploration and exploitation stages. Univariate analyses show higher activation in the bilateral hippocampus and lateral prefrontal cortex during exploration, positively associated with learning level and response accuracy. Conversely, the bilateral orbitofrontal cortex (OFC) and retrosplenial cortex show higher activation during exploitation, negatively associated with learning level and response accuracy. Representational similarity analysis show that the hippocampus, entorhinal cortex, and OFC more accurately represent destinations in exploitation than exploration stages. These findings highlight the collaboration between the medial temporal lobe and prefrontal cortex in learning abstract space structures. The hippocampus may be involved in spatial memory formation and representation, while the OFC integrates sensory information for decision-making in multidimensional abstract spaces.


Asunto(s)
Cognición , Hipocampo , Imagen por Resonancia Magnética , Corteza Prefrontal , Humanos , Hipocampo/fisiología , Hipocampo/diagnóstico por imagen , Masculino , Corteza Prefrontal/fisiología , Corteza Prefrontal/diagnóstico por imagen , Femenino , Cognición/fisiología , Adulto , Adulto Joven , Mapeo Encefálico/métodos , Toma de Decisiones/fisiología
8.
PLoS One ; 19(5): e0301851, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38696453

RESUMEN

This study tested the usability of a home-based self-administration transcranial direct current stimulation (tDCS) device designed specifically for women's health needs. This is a single center triple blinded clinical usability study for a new wireless, Bluetooth-controlled wearable tDCS device for women's health. The study aims to evaluate the usability and effective blinding of a home-based tDCS system. A total of forty-nine women of reproductive age were randomly allocated (1:1) to receive one session of active tDCS (n = 24) or sham tDCS (n = 25) over the motor and dorsolateral prefrontal cortex. Each participant self-administered one 20-minute session without supervision following guidance on a software application alone. The System Usability Scale (SUS) and the Patient Global Impression of Change (PGIC) were used to evaluate the usability of the system. Regardless of sham or active conditions, all users found the system easy to use without the support of researchers. Usability scores were considered to be "excellent" in both groups and no significant difference was found between sham and active groups showing effective blinding of the device (Active group: 93.7 (83.1-97.5); Sham group 90 (86.2-95) p = 0.79) and PGIC (Active group: 2 (1-2.75); Sham group 2 (1-2) p = 0.99) using an unpaired t-test or non-parametric statistical tests accordingly. The new Bluetooth-controlled wearable tDCS device is easy, safe to use and completely controlled by a smartphone app. This device is focused on women's health and will be tested as an alternative treatment for chronic pelvic pain and mood disturbance associated with menstrual cycles in further research.


Asunto(s)
Dismenorrea , Estimulación Transcraneal de Corriente Directa , Humanos , Femenino , Adulto , Estimulación Transcraneal de Corriente Directa/métodos , Estimulación Transcraneal de Corriente Directa/instrumentación , Dismenorrea/terapia , Adulto Joven , Autoadministración/instrumentación , Dispositivos Electrónicos Vestibles , Corteza Prefrontal/fisiología
9.
Sci Rep ; 14(1): 9996, 2024 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-38693184

RESUMEN

Tracking a moving object with the eyes seems like a simple task but involves areas of prefrontal cortex (PFC) associated with attention, working memory and prediction. Increasing the demand on these processes with secondary tasks can affect eye movements and/or perceptual judgments. This is particularly evident in chronic or acute neurological conditions such as Alzheimer's disease or mild traumatic brain injury. Here, we combined near infrared spectroscopy and video-oculography to examine the effects of concurrent upper limb movement, which provides additional afference and efference that facilitates tracking of a moving object, in a novel dual-task pursuit protocol. We confirmed the expected effects on judgement accuracy in the primary and secondary tasks, as well as a reduction in eye velocity when the moving object was occluded. Although there was limited evidence of oculo-manual facilitation on behavioural measures, performing concurrent upper limb movement did result in lower activity in left medial PFC, as well as a change in PFC network organisation, which was shown by Graph analysis to be locally and globally more efficient. These findings extend upon previous work by showing how PFC is functionally organised to support eye-hand coordination when task demands more closely replicate daily activities.


Asunto(s)
Corteza Prefrontal , Extremidad Superior , Humanos , Corteza Prefrontal/fisiología , Masculino , Femenino , Extremidad Superior/fisiología , Adulto , Adulto Joven , Movimiento/fisiología , Desempeño Psicomotor/fisiología , Movimientos Oculares/fisiología , Espectroscopía Infrarroja Corta , Atención/fisiología
10.
J Med Invest ; 71(1.2): 92-101, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38735731

RESUMEN

This study aimed to investigate blood flow dynamics in the bilateral prefrontal cortex during silent and oral reading using near-infrared spectroscopy (NIRS). The subjects were 40 right-handed university students (20.5±1.8 years old, 20 men and 20 women). After completing the NIRS measurements, the subjects were asked to rate their level of proficiency in silent and oral reading, using a 5-point Likert scale. During oral reading, the left lateral prefrontal cortex (Broca's area) was significantly more active than the right side. During silent reading, prefrontal cortex activity was lower than that during oral reading, and there was no significant difference between both sides of the brain. A significant negative correlation was found between the change in oxy-hemoglobin (oxy-Hb) concentration in the left and right lateral prefrontal cortex during silent reading and silent reading speed. In addition, students with lower self-reported reading proficiency had significantly greater changes in oxy-Hb concentrations in the left and right lateral prefrontal cortex during silent/oral reading than did students with higher self-reported reading proficiency. Reading task assessment using NIRS may be useful for identifying language lateralization and Broca's area. The results demonstrate that NIRS is useful for assessing effortful reading and may be used to diagnose developmental dyslexia in children. J. Med. Invest. 71 : 92-101, February, 2024.


Asunto(s)
Corteza Prefrontal , Lectura , Espectroscopía Infrarroja Corta , Humanos , Corteza Prefrontal/irrigación sanguínea , Corteza Prefrontal/fisiología , Corteza Prefrontal/diagnóstico por imagen , Masculino , Femenino , Adulto Joven , Oxihemoglobinas/análisis , Oxihemoglobinas/metabolismo , Circulación Cerebrovascular/fisiología , Adulto
11.
Sci Rep ; 14(1): 10242, 2024 05 03.
Artículo en Inglés | MEDLINE | ID: mdl-38702415

RESUMEN

Cerebral infra-slow oscillation (ISO) is a source of vasomotion in endogenic (E; 0.005-0.02 Hz), neurogenic (N; 0.02-0.04 Hz), and myogenic (M; 0.04-0.2 Hz) frequency bands. In this study, we quantified changes in prefrontal concentrations of oxygenated hemoglobin (Δ[HbO]) and redox-state cytochrome c oxidase (Δ[CCO]) as hemodynamic and metabolic activity metrics, and electroencephalogram (EEG) powers as electrophysiological activity, using concurrent measurements of 2-channel broadband near-infrared spectroscopy and EEG on the forehead of 22 healthy participants at rest. After preprocessing, the multi-modality signals were analyzed using generalized partial directed coherence to construct unilateral neurophysiological networks among the three neurophysiological metrics (with simplified symbols of HbO, CCO, and EEG) in each E/N/M frequency band. The links in these networks represent neurovascular, neurometabolic, and metabolicvascular coupling (NVC, NMC, and MVC). The results illustrate that the demand for oxygen by neuronal activity and metabolism (EEG and CCO) drives the hemodynamic supply (HbO) in all E/N/M bands in the resting prefrontal cortex. Furthermore, to investigate the effect of transcranial photobiomodulation (tPBM), we performed a sham-controlled study by delivering an 800-nm laser beam to the left and right prefrontal cortex of the same participants. After performing the same data processing and statistical analysis, we obtained novel and important findings: tPBM delivered on either side of the prefrontal cortex triggered the alteration or reversal of directed network couplings among the three neurophysiological entities (i.e., HbO, CCO, and EEG frequency-specific powers) in the physiological network in the E and N bands, demonstrating that during the post-tPBM period, both metabolism and hemodynamic supply drive electrophysiological activity in directed network coupling of the prefrontal cortex (PFC). Overall, this study revealed that tPBM facilitates significant modulation of the directionality of neurophysiological networks in electrophysiological, metabolic, and hemodynamic activities.


Asunto(s)
Electroencefalografía , Corteza Prefrontal , Espectroscopía Infrarroja Corta , Humanos , Corteza Prefrontal/fisiología , Corteza Prefrontal/metabolismo , Masculino , Adulto , Femenino , Espectroscopía Infrarroja Corta/métodos , Terapia por Luz de Baja Intensidad/métodos , Adulto Joven , Descanso/fisiología , Oxihemoglobinas/metabolismo , Complejo IV de Transporte de Electrones/metabolismo , Hemodinámica/fisiología , Red Nerviosa/fisiología , Red Nerviosa/metabolismo
12.
Neurobiol Learn Mem ; 211: 107926, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38579897

RESUMEN

Learning to stop responding is a fundamental process in instrumental learning. Animals may learn to stop responding under a variety of conditions that include punishment-where the response earns an aversive stimulus in addition to a reinforcer-and extinction-where a reinforced response now earns nothing at all. Recent research suggests that punishment and extinction may be related manifestations of a common retroactive interference process. In both paradigms, animals learn to stop performing a specific response in a specific context, suggesting direct inhibition of the response by the context. This process may depend on the infralimbic cortex (IL), which has been implicated in a variety of interference-based learning paradigms including extinction and habit learning. Despite the behavioral parallels between extinction and punishment, a corresponding role for IL in punishment has not been identified. Here we report that, in a simple arrangement where either punishment or extinction was conducted in a context that differed from the context in which the behavior was first acquired, IL inactivation reduced response suppression in the inhibitory context, but not responding when it "renewed" in the original context. In a more complex arrangement in which two responses were first trained in different contexts and then extinguished or punished in the opposite one, IL inactivation had no effect. The results advance our understanding of the effects of IL in retroactive interference and the behavioral mechanisms that can produce suppression of a response.


Asunto(s)
Condicionamiento Operante , Extinción Psicológica , Castigo , Extinción Psicológica/fisiología , Animales , Condicionamiento Operante/fisiología , Masculino , Ratas , Ratas Long-Evans , Corteza Prefrontal/fisiología , Muscimol/farmacología
13.
Cell Rep ; 43(4): 114097, 2024 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-38613783

RESUMEN

The rodent medial prefrontal cortex (mPFC) is functionally organized across the dorsoventral axis, where dorsal and ventral subregions promote and suppress fear, respectively. As the ventral-most subregion, the dorsal peduncular cortex (DP) is hypothesized to function in fear suppression. However, this role has not been explicitly tested. Here, we demonstrate that the DP paradoxically functions as a fear-encoding brain region and plays a minimal role in fear suppression. By using multimodal analyses, we demonstrate that DP neurons exhibit fear-learning-related plasticity and acquire cue-associated activity across learning and memory retrieval and that DP neurons activated by fear memory acquisition are preferentially reactivated upon fear memory retrieval. Further, optogenetic activation and silencing of DP fear-related neural ensembles drive the promotion and suppression of freezing, respectively. Overall, our results suggest that the DP plays a role in fear memory encoding. Moreover, our findings redefine our understanding of the functional organization of the rodent mPFC.


Asunto(s)
Miedo , Memoria , Corteza Prefrontal , Animales , Miedo/fisiología , Memoria/fisiología , Ratones , Corteza Prefrontal/fisiología , Masculino , Ratones Endogámicos C57BL , Neuronas/fisiología , Optogenética
14.
Prog Neurobiol ; 236: 102613, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38631480

RESUMEN

While medial frontal cortex (MFC) and subthalamic nucleus (STN) have been implicated in conflict monitoring and action inhibition, respectively, an integrated understanding of the spatiotemporal and spectral interaction of these nodes and how they interact with motor cortex (M1) to definitively modify motor behavior during conflict is lacking. We recorded neural signals intracranially across presupplementary motor area (preSMA), M1, STN, and globus pallidus internus (GPi), during a flanker task in 20 patients undergoing deep brain stimulation implantation surgery for Parkinson disease or dystonia. Conflict is associated with sequential and causal increases in local theta power from preSMA to STN to M1 with movement delays directly correlated with increased STN theta power, indicating preSMA is the MFC locus that monitors conflict and signals STN to implement a 'break.' Transmission of theta from STN-to-M1 subsequently results in a transient increase in M1-to-GPi beta flow immediately prior to movement, modulating the motor network to actuate the conflict-related action inhibition (i.e., delayed response). Action regulation during conflict relies on two distinct circuits, the conflict-related theta and movement-related beta networks, that are separated spatially, spectrally, and temporally, but which interact dynamically to mediate motor performance, highlighting complex parallel yet interacting networks regulating movement.


Asunto(s)
Conflicto Psicológico , Estimulación Encefálica Profunda , Corteza Motora , Enfermedad de Parkinson , Corteza Prefrontal , Núcleo Subtalámico , Ritmo Teta , Humanos , Ritmo Teta/fisiología , Núcleo Subtalámico/fisiología , Masculino , Femenino , Persona de Mediana Edad , Adulto , Corteza Prefrontal/fisiología , Corteza Motora/fisiología , Enfermedad de Parkinson/fisiopatología , Anciano , Vías Nerviosas/fisiología , Distonía/fisiopatología
15.
Trials ; 25(1): 269, 2024 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-38632647

RESUMEN

BACKGROUND: Treatment effects of conventional approaches with antipsychotics or psychosocial interventions are limited when it comes to reducing negative and cognitive symptoms in schizophrenia. While there is emerging clinical evidence that new, augmented protocols based on theta-burst stimulation can increase rTMS efficacy dramatically in depression, data on similar augmented therapies are limited in schizophrenia. The different patterns of network impairments in subjects may underlie that some but not all patients responded to given stimulation locations. METHODS: Therefore, we propose an augmented theta-burst stimulation protocol in schizophrenia by stimulating both locations connected to negative symptoms: (1) the left dorsolateral prefrontal cortex (DLPFC), and (2) the vermis of the cerebellum. Ninety subjects with schizophrenia presenting negative symptoms and aging between 18 and 55 years will be randomized to active and sham stimulation in a 1:1 ratio. The TBS parameters we adopted follow the standard TBS protocols, with 3-pulse 50-Hz bursts given every 200 ms (at 5 Hz) and an intensity of 100% active motor threshold. We plan to deliver 1800 stimuli to the left DLPFC and 1800 stimuli to the vermis daily in two 9.5-min blocks for 4 weeks. The primary endpoint is the change in negative symptom severity measured by the Positive and Negative Syndrome Scale (PANSS). Secondary efficacy endpoints are changes in cognitive flexibility, executive functioning, short-term memory, social cognition, and facial emotion recognition. The difference between study groups will be analyzed by a linear mixed model analysis with the difference relative to baseline in efficacy variables as the dependent variable and treatment group, visit, and treatment-by-visit interaction as independent variables. The safety outcome is the number of serious adverse events. DISCUSSION: This is a double-blind, sham-controlled, randomized medical device study to assess the efficacy and safety of an augmented theta-burst rTMS treatment in schizophrenia. We hypothesize that social cognition and negative symptoms of patients on active therapy will improve significantly compared to patients on sham treatment. TRIAL REGISTRATION: The study protocol is registered at "ClinicalTrials.gov" with the following ID: NCT05100888. All items from the World Health Organization Trial Registration Data Set are registered. Initial release: 10/19/2021.


Asunto(s)
Esquizofrenia , Adulto , Humanos , Persona de Mediana Edad , Cognición , Método Doble Ciego , Corteza Prefrontal/fisiología , Escalas de Valoración Psiquiátrica , Ensayos Clínicos Controlados Aleatorios como Asunto , Esquizofrenia/diagnóstico , Estimulación Magnética Transcraneal/métodos , Resultado del Tratamiento , Adolescente , Adulto Joven
16.
Front Neural Circuits ; 18: 1286111, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38638163

RESUMEN

Cognitive control of behavior is crucial for well-being, as allows subject to adapt to changing environments in a goal-directed way. Changes in cognitive control of behavior is observed during cognitive decline in elderly and in pathological mental conditions. Therefore, the recovery of cognitive control may provide a reliable preventive and therapeutic strategy. However, its neural basis is not completely understood. Cognitive control is supported by the prefrontal cortex, structure that integrates relevant information for the appropriate organization of behavior. At neurophysiological level, it is suggested that cognitive control is supported by local and large-scale synchronization of oscillatory activity patterns and neural spiking activity between the prefrontal cortex and distributed neural networks. In this review, we focus mainly on rodent models approaching the neuronal origin of these prefrontal patterns, and the cognitive and behavioral relevance of its coordination with distributed brain systems. We also examine the relationship between cognitive control and neural activity patterns in the prefrontal cortex, and its role in normal cognitive decline and pathological mental conditions. Finally, based on these body of evidence, we propose a common mechanism that may underlie the impaired cognitive control of behavior.


Asunto(s)
Encéfalo , Roedores , Animales , Humanos , Anciano , Corteza Prefrontal/fisiología , Neuronas/fisiología , Cognición/fisiología
17.
Sci Rep ; 14(1): 9094, 2024 04 20.
Artículo en Inglés | MEDLINE | ID: mdl-38643299

RESUMEN

Transcranial direct current stimulation (tDCS) can be used to non-invasively augment cognitive training. However, the benefits of tDCS may be due in part to placebo effects, which have not been well-characterized. The purpose of this study was to determine whether tDCS can have a measurable placebo effect on cognitive training and to identify potential sources of this effect. Eighty-three right-handed adults were randomly assigned to one of three groups: control (no exposure to tDCS), sham tDCS, or active tDCS. The sham and active tDCS groups were double-blinded. Each group performed 20 min of an adapted Corsi Block Tapping Task (CBTT), a visuospatial working memory task. Anodal or sham tDCS was applied during CBTT training in a right parietal-left supraorbital montage. After training, active and sham tDCS groups were surveyed on expectations about tDCS efficacy. Linear mixed effects models showed that the tDCS groups (active and sham combined) improved more on the CBTT with training than the control group, suggesting a placebo effect of tDCS. Participants' tDCS expectations were significantly related to the placebo effect, as was the belief of receiving active stimulation. This placebo effect shows that the benefits of tDCS on cognitive training can occur even in absence of active stimulation. Future tDCS studies should consider how treatment expectations may be a source of the placebo effect in tDCS research, and identify ways to potentially leverage them to maximize treatment benefit.


Asunto(s)
Memoria a Corto Plazo , Estimulación Transcraneal de Corriente Directa , Adulto , Humanos , Memoria a Corto Plazo/fisiología , Efecto Placebo , Mano , Corteza Prefrontal/fisiología , Método Doble Ciego
18.
J Psychiatr Res ; 173: 309-316, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38569451

RESUMEN

OBJECTIVE: Psychomotor retardation is a core clinical component of Major Depressive Disorder responsible for disability and is known as a treatment response marker of biological treatments for depression. Our objective was to describe cognitive and motoric measures changes during a treatment by repetitive Transcranial Magnetic Stimulation (rTMS) within the THETAD-DEP trial for treatment-resistant depression (TRD), and compare those performances at the end of treatment and one month after between responders (>50% improvement on MADRS score), partial responders (25-50%) and non-reponders (no clinically relevant improvement). Our secondary aim was to investigate baseline psychomotor performances associated with non-response and response even partial. METHODS: Fifty-four patients with treatment-resistant unipolar depression and treated by either high frequency 10 Hz rTMS or iTBS for 4 weeks (20 sessions) underwent assessment including French Retardation Rating Scale for Depression (ERD), Verbal Fluency test, and Trail Making Test A. before, just after treatment and one month later. RESULTS: 20 patients were responders (R, 21 partial responders (PR) and 13 non-responders (NR). rTMS treatment improved psychomotor performances in the R and PR groups unlike NR patients whose psychomotor performance was not enhanced by treatment. At baseline, participants, later identified as partial responders, showed significantly higher performances than non-responders. CONCLUSION: Higher cognitivo-motor performances at baseline may be associated with clinical improvement after rTMS treatment. This work highlights the value of objective psychomotor testing for the identification of rTMS responders and partial responders, and thus may be useful for patient selection and protocol individualization such as treatment continuation for early partial responders.


Asunto(s)
Trastorno Depresivo Mayor , Trastorno Depresivo Resistente al Tratamiento , Humanos , Trastorno Depresivo Mayor/complicaciones , Trastorno Depresivo Resistente al Tratamiento/terapia , Trastorno Depresivo Resistente al Tratamiento/complicaciones , Fenómenos Magnéticos , Corteza Prefrontal/fisiología , Desempeño Psicomotor , Estimulación Magnética Transcraneal/métodos , Resultado del Tratamiento
19.
Sheng Li Xue Bao ; 76(2): 233-246, 2024 Apr 25.
Artículo en Inglés | MEDLINE | ID: mdl-38658373

RESUMEN

The high-order cognitive and executive functions are necessary for an individual to survive. The densely bidirectional innervations between the medial prefrontal cortex (mPFC) and the mediodorsal thalamus (MD) play a vital role in regulating high-order functions. Pyramidal neurons in mPFC have been classified into several subclasses according to their morphological and electrophysiological properties, but the properties of the input-specific pyramidal neurons in mPFC remain poorly understood. The present study aimed to profile the morphological and electrophysiological properties of mPFC pyramidal neurons innervated by MD. In the past, the studies for characterizing the morphological and electrophysiological properties of neurons mainly relied on the electrophysiological recording of a large number of neurons and their morphologic reconstructions. But, it is a low efficient method for characterizing the circuit-specific neurons. The present study combined the advantages of traditional morphological and electrophysiological methods with machine learning to address the shortcomings of the past method, to establish a classification model for the morphological and electrophysiological properties of mPFC pyramidal neurons, and to achieve more accurate and efficient identification of the properties from a small size sample of neurons. We labeled MD-innervated pyramidal neurons of mPFC using the trans-synaptic neural circuitry tracing method and obtained their morphological properties using whole-cell patch-clamp recording and morphologic reconstructions. The results showed that the classification model established in the present study could predict the electrophysiological properties of MD-innervated pyramidal neurons based on their morphology. MD-innervated pyramidal neurons exhibit larger basal dendritic length but lower apical dendrite complexity compared to non-MD-innervated neurons in the mPFC. The morphological characteristics of the two subtypes (ET-1 and ET-2) of mPFC pyramidal neurons innervated by MD are different, with the apical dendrites of ET-1 neurons being longer and more complex than those of ET-2 neurons. These results suggest that the electrophysiological properties of MD- innervated pyramidal neurons within mPFC correlate with their morphological properties, indicating that the different roles of these two subclasses in local circuits within PFC, as well as in PFC-cortical/subcortical brain region circuits.


Asunto(s)
Corteza Prefrontal , Células Piramidales , Células Piramidales/fisiología , Células Piramidales/citología , Corteza Prefrontal/fisiología , Corteza Prefrontal/citología , Animales , Ratas , Núcleo Talámico Mediodorsal/fisiología , Núcleo Talámico Mediodorsal/citología , Masculino , Fenómenos Electrofisiológicos , Vías Nerviosas/fisiología , Vías Nerviosas/citología , Aprendizaje Automático , Ratas Sprague-Dawley , Técnicas de Placa-Clamp
20.
Elife ; 122024 Apr 09.
Artículo en Inglés | MEDLINE | ID: mdl-38593008

RESUMEN

Brain disturbances during development can have a lasting impact on neural function and behavior. Seizures during this critical period are linked to significant long-term consequences such as neurodevelopmental disorders, cognitive impairments, and psychiatric symptoms, resulting in a complex spectrum of multimorbidity. The hippocampus-prefrontal cortex (HPC-PFC) circuit emerges as a potential common link between such disorders. However, the mechanisms underlying these outcomes and how they relate to specific behavioral alterations are unclear. We hypothesized that specific dysfunctions of hippocampal-cortical communication due to early-life seizure would be associated with distinct behavioral alterations observed in adulthood. Here, we performed a multilevel study to investigate behavioral, electrophysiological, histopathological, and neurochemical long-term consequences of early-life Status epilepticus in male rats. We show that adult animals submitted to early-life seizure (ELS) present working memory impairments and sensorimotor disturbances, such as hyperlocomotion, poor sensorimotor gating, and sensitivity to psychostimulants despite not exhibiting neuronal loss. Surprisingly, cognitive deficits were linked to an aberrant increase in the HPC-PFC long-term potentiation (LTP) in a U-shaped manner, while sensorimotor alterations were associated with heightened neuroinflammation, as verified by glial fibrillary acidic protein (GFAP) expression, and altered dopamine neurotransmission. Furthermore, ELS rats displayed impaired HPC-PFC theta-gamma coordination and an abnormal brain state during active behavior resembling rapid eye movement (REM) sleep oscillatory dynamics. Our results point to impaired HPC-PFC functional connectivity as a possible pathophysiological mechanism by which ELS can cause cognitive deficits and psychiatric-like manifestations even without neuronal loss, bearing translational implications for understanding the spectrum of multidimensional developmental disorders linked to early-life seizures.


Asunto(s)
Hipocampo , Convulsiones , Ratas , Animales , Masculino , Hipocampo/patología , Encéfalo , Corteza Prefrontal/fisiología , Memoria a Corto Plazo/fisiología
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