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1.
Curr Psychol ; : 1-19, 2022 Oct 14.
Artículo en Inglés | MEDLINE | ID: mdl-36258889

RESUMEN

It is now widely accepted that we are in a climate emergency, and the number of people who are concerned about this problem is growing. Yet, qualitative, in-depth studies to investigate the emotional response to climate change were conducted either in high-income, western countries, or in low-income countries particularly vulnerable to climate change. To our knowledge, there are no qualitative studies conducted in countries that share great barriers to decarbonization while being significant contributors to carbon emissions. Since climate change affects people globally, it is crucial to study this topic in a variety of socio-political contexts. In this work, we discuss views and reflections voiced by highly concerned residents of Poland, a Central European country that is a major contributor to Europe's carbon emissions. We conducted 40 semi-structured interviews with Polish residents, who self-identified as concerned about climate change. A variety of emotions related to climate change were identified and placed in the context of four major themes: dangers posed by climate change, the inevitability of its consequences, attributions of responsibility, and commonality of concern. Our findings highlight a variety of often ambivalent and conflicting emotions that change along with the participant's thoughts, experiences and behaviours. Furthermore, we describe a wide repertoire of coping strategies, which promoted well-being and sustained long-term engagement in climate action. As such, our work contributes to research on a broad array of climate-related emotions. Supplementary Information: The online version contains supplementary material available at 10.1007/s12144-022-03807-3.

2.
J Neurosci ; 41(47): 9720-9731, 2021 11 24.
Artículo en Inglés | MEDLINE | ID: mdl-34663627

RESUMEN

It has been proposed that the auditory cortex in the deaf humans might undergo task-specific reorganization. However, evidence remains scarce as previous experiments used only two very specific tasks (temporal processing and face perception) in visual modality. Here, congenitally deaf/hard of hearing and hearing women and men were enrolled in an fMRI experiment as we sought to fill this evidence gap in two ways. First, we compared activation evoked by a temporal processing task performed in two different modalities, visual and tactile. Second, we contrasted this task with a perceptually similar task that focuses on the spatial dimension. Additional control conditions consisted of passive stimulus observation. In line with the task specificity hypothesis, the auditory cortex in the deaf was activated by temporal processing in both visual and tactile modalities. This effect was selective for temporal processing relative to spatial discrimination. However, spatial processing also led to significant auditory cortex recruitment which, unlike temporal processing, occurred even during passive stimulus observation. We conclude that auditory cortex recruitment in the deaf and hard of hearing might involve interplay between task-selective and pluripotential mechanisms of cross-modal reorganization. Our results open several avenues for the investigation of the full complexity of the cross-modal plasticity phenomenon.SIGNIFICANCE STATEMENT Previous studies suggested that the auditory cortex in the deaf may change input modality (sound to vision) while keeping its function (e.g., rhythm processing). We investigated this hypothesis by asking deaf or hard of hearing and hearing adults to discriminate between temporally and spatially complex sequences in visual and tactile modalities. The results show that such function-specific brain reorganization, as has previously been demonstrated in the visual modality, also occurs for tactile processing. On the other hand, they also show that for some stimuli (spatial) the auditory cortex activates automatically, which is suggestive of a take-over by a different kind of cognitive function. The observed differences in processing of sequences might thus result from an interplay of task-specific and pluripotent plasticity.


Asunto(s)
Corteza Auditiva/fisiología , Trastornos de la Audición , Percepción del Tacto/fisiología , Percepción Visual/fisiología , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino , Plasticidad Neuronal/fisiología , Estimulación Luminosa/métodos , Estimulación Física/métodos , Procesamiento Espacial/fisiología , Percepción del Tiempo/fisiología
3.
Cortex ; 135: 240-254, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-33401098

RESUMEN

There is strong evidence that neuronal bases for language processing are remarkably similar for sign and spoken languages. However, as meanings and linguistic structures of sign languages are coded in movement and space and decoded through vision, differences are also present, predominantly in occipitotemporal and parietal areas, such as superior parietal lobule (SPL). Whether the involvement of SPL reflects domain-general visuospatial attention or processes specific to sign language comprehension remains an open question. Here we conducted two experiments to investigate the role of SPL and the laterality of its engagement in sign language lexical processing. First, using unique longitudinal and between-group designs we mapped brain responses to sign language in hearing late learners and deaf signers. Second, using transcranial magnetic stimulation (TMS) in both groups we tested the behavioural relevance of SPL's engagement and its lateralisation during sign language comprehension. SPL activation in hearing participants was observed in the right hemisphere before and bilaterally after the sign language course. Additionally, after the course hearing learners exhibited greater activation in the occipital cortex and left SPL than deaf signers. TMS applied to the right SPL decreased accuracy in both hearing learners and deaf signers. Stimulation of the left SPL decreased accuracy only in hearing learners. Our results suggest that right SPL might be involved in visuospatial attention while left SPL might support phonological decoding of signs in non-proficient signers.


Asunto(s)
Sordera , Lengua de Signos , Humanos , Imagen por Resonancia Magnética , Lóbulo Parietal/diagnóstico por imagen , Estimulación Magnética Transcraneal
4.
Sci Rep ; 8(1): 3808, 2018 02 28.
Artículo en Inglés | MEDLINE | ID: mdl-29491383

RESUMEN

It is widely accepted that people differ in memory performance. The ability to control one's memory depends on multiple factors, including the emotional properties of the memorized material. While it was widely demonstrated that emotion can facilitate memory, it is unclear how emotion modifies our ability to suppress memory. One of the reasons for the lack of consensus among researchers is that individual differences in memory performance were largely neglected in previous studies. We used the directed forgetting paradigm in an fMRI study, in which subjects viewed neutral and emotional words, which they were instructed to remember or to forget. Subsequently, subjects' memory of these words was tested. Finally, they assessed the words on scales of valence, arousal, sadness and fear. We found that memory performance depended on instruction as reflected in the engagement of the lateral prefrontal cortex (lateral PFC), irrespective of emotional properties of words. While the lateral PFC engagement did not differ between neutral and emotional conditions, it correlated with behavioural performance when emotional - as opposed to neutral - words were presented. A deeper understanding of the underlying brain mechanisms is likely to require a study of individual differences in cognitive abilities to suppress memory.


Asunto(s)
Cognición , Emociones/fisiología , Individualidad , Memoria , Adulto , Encéfalo/diagnóstico por imagen , Encéfalo/fisiología , Mapeo Encefálico , Femenino , Humanos , Imagen por Resonancia Magnética , Adulto Joven
5.
Psychol Med ; 48(11): 1862-1871, 2018 08.
Artículo en Inglés | MEDLINE | ID: mdl-29173243

RESUMEN

BACKGROUND: Recognition of communicative interactions is a complex social cognitive ability which is associated with a specific neural activity in healthy individuals. However, neural correlates of communicative interaction processing from whole-body motion have not been known in patients with schizophrenia (SCZ). Therefore, the current study aims to examine the neural activity associated with recognition of communicative interactions in SCZ by using displays of the dyadic interactions downgraded to minimalistic point-light presentations. METHODS: Twenty-six healthy controls (HC) and 25 SCZ were asked to judge whether two agents presented only by point-light displays were communicating or acting independently. Task-related activity and functional connectivity of brain structures were examined with General Linear Model and Generalized Psychophysiological Interaction approach, respectively. RESULTS: HC were significantly more efficient in recognizing each type of action than SCZ. At the neural level, the activity of the right posterior superior temporal sulcus (pSTS) was observed to be higher in HC compared with SCZ for communicative v. individual action processing. Importantly, increased connectivity of the right pSTS with structures associated with mentalizing (left pSTS) and mirroring networks (left frontal areas) was observed in HC, but not in SCZ, during the presentation of social interactions. CONCLUSION: Under-recruitment of the right pSTS, a structure known to have a pivotal role in social processing, may also be of importance for higher-order social cognitive deficits in SCZ. Furthermore, decreased task-related connectivity of the right pSTS may result in reduced use of additional sources of information (for instance motor resonance signals) during social cognitive processing in schizophrenia.


Asunto(s)
Corteza Cerebral/fisiopatología , Conectoma/métodos , Relaciones Interpersonales , Percepción de Movimiento/fisiología , Reconocimiento Visual de Modelos/fisiología , Esquizofrenia/fisiopatología , Percepción Social , Adulto , Corteza Cerebral/diagnóstico por imagen , Comunicación , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Adulto Joven
6.
Protoplasma ; 255(1): 43-55, 2018 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-28612274

RESUMEN

The midgut of millipedes is composed of a simple epithelium that rests on a basal lamina, which is surrounded by visceral muscles and hepatic cells. As the material for our studies, we chose Telodeinopus aoutii (Demange, 1971) (Kenyan millipede) (Diplopoda, Spirostreptida), which lives in the rain forests of Central Africa. This commonly reared species is easy to obtain from local breeders and easy to culture in the laboratory. During our studies, we used transmission and scanning electron microscopes and light and fluorescent microscopes. The midgut epithelium of the species examined here shares similarities to the structure of the millipedes analyzed to date. The midgut epithelium is composed of three types of cells-digestive, secretory, and regenerative cells. Evidence of three types of secretion have been observed in the midgut epithelium: merocrine, apocrine, and microapocrine secretion. The regenerative cells of the midgut epithelium in millipedes fulfill the role of midgut stem cells because of their main functions: self-renewal (the ability to divide mitotically and to maintain in an undifferentiated state) and potency (ability to differentiate into digestive cells). We also confirmed that spot desmosomes are common intercellular junctions between the regenerative and digestive cells in millipedes.


Asunto(s)
Artrópodos/ultraestructura , Epitelio/metabolismo , Microscopía Electrónica de Rastreo/métodos , Animales , Regeneración
7.
Neotrop Entomol ; 46(1): 45-57, 2017 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-27553718

RESUMEN

Cimicidae are temporary ectoparasites, which means that they cannot obtain food continuously. Both Cimex species examined here, Cimex lectularius (Linnaeus 1758) and Cimex pipistrelli (Jenyns 1839), can feed on a non-natal host, C. lectularius from humans on bats, C. pipistrelli on humans, but never naturally. The midgut of C. lectularius and C. pipistrelli is composed of three distinct regions-the anterior midgut (AMG), which has a sack-like shape, the long tube-shaped middle midgut (MMG), and the posterior midgut (PMG). The different ultrastructures of the AMG, MMG, and PMG in both of the species examined suggest that these regions must fulfill different functions in the digestive system. Ultrastructural analysis showed that the AMG fulfills the role of storing food and synthesizing and secreting enzymes, while the MMG is the main organ for the synthesis of enzymes, secretion, and the storage of the reserve material. Additionally, both regions, the AMG and MMG, are involved in water absorption in the digestive system of both Cimex species. The PMG is the part of the midgut in which spherites accumulate. The results of our studies confirm the suggestion of former authors that the structure of the digestive tract of insects is not attributed solely to diet but to the basic adaptation of an ancestor.


Asunto(s)
Chinches/anatomía & histología , Sistema Digestivo/anatomía & histología , Conducta Alimentaria , Animales , Quirópteros , Dieta , Humanos
8.
Arthropod Struct Dev ; 45(6): 536-551, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27671869

RESUMEN

The salivary glands (mandibular epidermal glands) of adult males and females of Lithobius forficatus (Myriapoda, Chilopoda) were isolated during spring, summer and autumn. In addition, the organs were isolated at different times of the day - at about 12:00 (noon) and about 00:00 (midnight). The ultrastructure of these organs depending on seasonal and circadian rhythms was analyzed using transmission and scanning electron microscopy and histochemical methods. The paired salivary glands of L. forficatus are situated in the vicinity of the foregut and they are formed by numerous acini that are surrounded by the fat body, hemocytes and tracheolae. The salivary glands are composed of a terminal acinar component and a system of tubular ducts that are lined with a cuticle. The glandular part is composed of secretory epithelial cells that are at various stages of their secretory activity. The saliva that is produced by the secretory cells of the acini is secreted into the salivary ducts, which are lined with a simple epithelium that is based on the non-cellular basal lamina. The ultrastructural variations suggest that salivary glands function differently depending on seasonal rhythms and prepare the animal for overwintering. Therefore, the salivary glands of the centipedes that were analyzed participate in the accumulation of proteins, lipids and polysaccharides during the spring, summer and autumn. Subtle differences in the ultrastructure of the secretory cells of the salivary glands during the circadian cycle must be related to the physiological reactions of the organism. The salivary ducts showed no differences in the specimens that were analyzed during the day/night cycle or during the seasonal cycle.


Asunto(s)
Artrópodos/ultraestructura , Ritmo Circadiano , Glándulas Salivales/ultraestructura , Adaptación Fisiológica , Animales , Conducta Alimentaria , Glucógeno/metabolismo , Microscopía Electrónica de Rastreo , Polisacáridos/metabolismo , Glándulas Salivales/metabolismo , Estaciones del Año
9.
Int J Psychophysiol ; 107: 54-62, 2016 09.
Artículo en Inglés | MEDLINE | ID: mdl-27327377

RESUMEN

BACKGROUND: Despite social cognitive dysfunction that may be observed in patients with schizophrenia, the knowledge about social and nonsocial affective processing in schizophrenia is scant. The aim of this study was to examine neurophysiological and behavioural responses to neutral and negative stimuli with (faces, people) and without (animals, objects) social content in schizophrenia. METHODS: Twenty-six patients with schizophrenia (SCZ) and 21 healthy controls (HC) completed a visual oddball paradigm with either negative or neutral pictures from the Nencki Affective Picture System (NAPS) as targets while EEG was recorded. Half of the stimuli within each category presented social content (faces, people). RESULTS: Negative stimuli with social content produced lower N2 amplitude and higher mean LPP than any other type of stimuli in both groups. Despite differences in behavioural ratings and alterations in ERP processing of affective stimuli (lack of EPN differentiation, decreased P3 to neutral stimuli) SCZ were still able to respond to specific categories of stimuli similarly to HC. CONCLUSIONS: The pattern of results suggests that with no additional emotion-related task demands patients with schizophrenia may present similar attentional engagement with negative social stimuli as healthy controls.


Asunto(s)
Afecto/fisiología , Potenciales Evocados/fisiología , Esquizofrenia/fisiopatología , Percepción Social , Adulto , Electroencefalografía , Femenino , Humanos , Masculino , Adulto Joven
10.
J Physiol Pharmacol ; 65(5): 733-8, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-25371533

RESUMEN

The aim of this study was to evaluate the influence of a six-week aerobic training on peripheral blood in adults with Down syndrome. Fifteen men with Down syndrome (average age 22.4 years ± 0.91) with moderate or severe intellectual disability took part in the study. Patients underwent a training program three times a week for six weeks. Venous blood samples of 10 ml were collected from every examined patient, 24 hours before and after the exercise. The blood samples were submitted to hematological examination (hematocrit, fibrinogen, plasma viscosity, red blood cell (RBC) number, RBC indicators: mean corpuscular volume (MCV), mean corpuscular hemoglobin concentration (MCHC), mean corpuscular hemoglobin (MCH)), reduced glutathione (GSH) level and number of macrocytes, polikilocytrometric examination of RBC and rheological blood examination (elongation index (EI), aggregation index (AI), syllectogram amplitude (AMP), aggregation half time (t1/2)) was made by LORCA. Amoderate six-week physical training performed on a cycloergometer resulted in a statistically significant decrease in the MCV value, hematocrit and plasma viscosity. The six-week cycloergometer training caused a statistically significant increase in the GSH level and erythrocyte pliability at a shear stress of 0.58 Pa.


Asunto(s)
Síndrome de Down/sangre , Esfuerzo Físico , Adulto , Viscosidad Sanguínea , Síndrome de Down/fisiopatología , Recuento de Eritrocitos , Índices de Eritrocitos , Eritrocitos/citología , Eritrocitos/fisiología , Glutatión/sangre , Hematócrito , Humanos , Masculino , Proyectos Piloto , Adulto Joven
11.
Neuropsychologia ; 49(12): 3327-37, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21864550

RESUMEN

Left unilateral spatial neglect resulting from right brain damage is characterized by loss of awareness for stimuli in the contralesional side of space, despite intact visual pathways. We examined using fMRI whether patients with neglect are more likely to consciously detect in the neglected hemifield, emotionally negative complex scenes rather than visually similar neutral pictures and if so, what neural mechanisms mediate this effect. Photographs of emotional and neutral scenes taken from the IAPS were presented in a divided visual field paradigm. As expected, the detection rate for emotional stimuli presented in the neglected field was higher than for neutral ones. Successful detection of emotional scenes as opposed to neutral stimuli in the left visual field (LVF) produced activations in the parahippocampal and anterior cingulate areas in the right hemisphere. Detection of emotional stimuli presented in the intact right visual field (RVF) activated a distributed network of structures in the left hemisphere, including anterior and posterior cingulate cortex, insula, as well as visual striate and extrastriate areas. LVF-RVF contrasts for emotional stimuli revealed activations in right and left attention related prefrontal areas whereas RVF-LVF comparison showed activations in the posterior cingulate and extrastriate visual cortex in the left hemisphere. An additional analysis contrasting detected vs. undetected emotional LVF stimuli showed involvement of left anterior cingulate, right frontal and extrastriate areas. We hypothesize that beneficial role of emotion in overcoming neglect is achieved by activation of frontal and limbic lobe networks, which provide a privileged access of emotional stimuli to attention by top-down modulation of processing in the higher-order extrastriate visual areas. Our results point to the importance of top-down regulatory role of the frontal attentional systems, which might enhance visual activations and lead to greater salience of emotional stimuli for perceptual awareness.


Asunto(s)
Trastorno por Déficit de Atención con Hiperactividad/etiología , Emociones/fisiología , Trastornos de la Percepción/complicaciones , Campos Visuales/fisiología , Adulto , Anciano , Encéfalo/irrigación sanguínea , Encéfalo/fisiopatología , Mapeo Encefálico , Femenino , Lateralidad Funcional , Humanos , Procesamiento de Imagen Asistido por Computador , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas , Oxígeno/sangre , Trastornos de la Percepción/patología , Estimulación Luminosa/métodos
12.
Clin Hemorheol Microcirc ; 47(3): 169-76, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21498896

RESUMEN

The principal aim of the study was to investigate rheological properties of erythrocytes obtained from patients admitted to the clinic, and diagnosed with polycythemia vera. The polycythemia vera diagnosis was based on the WHO criteria for polycythemia vera. Using a laser rheometer SSD Rheometer-Rheodyn, the elongation index of erythrocytes was determined, indicating an increased rigidity of the erythrocytes in this disease compared with the erythrocytes in healthy people. In order to explain (albeit partially) the reason for reduced elasticity, the erythrocytes of patients with polycythemia were studied for the activity of enzymes - glucose-6-phosphate dehydrogenase and acetylcholinesterase membrane enzyme, as well as the levels of glutathione and malonyldialdehyde. The elevated activities of these enzymes, the glutathione level, and elevated ‰ of reticulocytes, indicated an increased pool of juvenile erythrocyte forms; furthermore, the elevated value of malonyldialdehyde may suggest a lipid peroxidative damage in certain pool of the erythrocyte membrane in blood circulation.


Asunto(s)
Acetilcolinesterasa/sangre , Eritrocitos/metabolismo , Glucosafosfato Deshidrogenasa/sangre , Glutatión/sangre , Malondialdehído/sangre , Policitemia Vera/sangre , Anciano , Membrana Eritrocítica/enzimología , Membrana Eritrocítica/metabolismo , Eritrocitos/enzimología , Humanos , Masculino , Policitemia Vera/diagnóstico , Policitemia Vera/enzimología , Reticulocitos/enzimología , Reticulocitos/metabolismo , Reología
13.
Soc Neurosci ; 6(1): 98-107, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-20602286

RESUMEN

Our own name, due to its high social relevance, is supposed to have a unique status in our information processing. However, demonstrating this phenomenon empirically proves difficult as famous and unknown names, to which self-name is often compared in the studies, may differ from self-name not only in terms of the 'me vs. not-me' distinction, but also as regards their emotional content and frequency of occurrence in everyday life. In this fMRI study, apart from famous and unknown names we used the names of the most important persons in our subjects' lives. When compared to famous or unknown names recognition, self-name recognition was associated with robust activations in widely distributed bilateral network including fronto-temporal, limbic and subcortical structures, however, when compared to significant other's name, the activations were present specifically in the right inferior frontal gyrus. In addition, the significant other's name produced a similar pattern of activations to the one activated by self-name. These results suggest that the differences between own and other's name processing may rather be quantitative than qualitative in nature.


Asunto(s)
Encéfalo/fisiología , Nombres , Reconocimiento en Psicología/fisiología , Autoimagen , Adulto , Mapeo Encefálico , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino
14.
Neuropsychologia ; 48(9): 2447-57, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20430041

RESUMEN

Dyslexia is characterized by a core phonological deficit, although recent studies indicate that semantic impairment also contributes to this condition. In this study, event-related potentials (ERP) were used to examine whether the N400 wave in dyslexic children is modulated by phonological or semantic priming, similarly to age-matched controls. ERPs were recorded while children listened to word lists in which the semantic and phonological congruency of the terminal words were manipulated. No overt judgments were made by participants. In control children the N400 amplitude to both semantically and phonologically incongruent words was enlarged relative to congruent words. Dyslexic children exhibited a dissociation of priming effects depending on whether semantic or phonological primes were used. Semantic priming elicited an N400 effect comparable to controls, though delayed. In phonological priming, the dyslexics differed from controls in both the phonologically incongruent and congruent conditions showing reduced N400 amplitude in the former and enhanced N400 in the latter. This pattern suggests that when faced with phonological priming, dyslexics show abnormal neural responses related to both integration of similarities between the consecutive stimuli and the ability to detect incongruent stimuli. Semantic priming seems relatively intact in dyslexics, however neural responses to contextual incongruency are delayed.


Asunto(s)
Dislexia/complicaciones , Trastornos del Desarrollo del Lenguaje/etiología , Fonética , Semántica , Estimulación Acústica/métodos , Análisis de Varianza , Mapeo Encefálico , Niño , Electroencefalografía , Potenciales Evocados/fisiología , Femenino , Humanos , Masculino , Tiempo de Reacción , Estadística como Asunto
15.
Neurobiol Learn Mem ; 90(1): 280-4, 2008 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-18329298

RESUMEN

We have investigated whether the left (LH) and right (RH) hemisphere play a different role in eliciting false recognition (FR) and whether their involvement in this memory illusion depends on the emotional content of stimuli. Negative and neutral pictures (taken from IAPS) were presented in the divided-visual field paradigm. Subjects task was to indicate whether the pictures had already been presented or not during the preceding study phase. FR rate was much higher for the RH than the LH presentations. In line, FR resulted in activations mainly in the right prefrontal cortex (PFC) for either RH or LH presentations. Emotional content of stimuli facilitated the formation of false memories and strengthened the involvement of the right PFC in FR induction.


Asunto(s)
Emociones/fisiología , Lateralidad Funcional/fisiología , Imagen por Resonancia Magnética , Corteza Prefrontal/fisiología , Reconocimiento en Psicología/fisiología , Represión Psicológica , Adulto , Femenino , Humanos , Masculino , Estimulación Luminosa
19.
Nurs Res ; 30(1): 30-1, 1981.
Artículo en Inglés | MEDLINE | ID: mdl-6906013

RESUMEN

Development of the Nursing Research Committee in the Mary Hitchcock Memorial Hospital, Hanover, New Hampshire, is described. Six problems were identified, and ways in which the committee solved the problems are discussed.


Asunto(s)
Servicio de Enfermería en Hospital/organización & administración , Enfermería , Comité de Profesionales , Investigación , Ética en Enfermería , New Hampshire
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