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1.
Neuroimage ; 265: 119812, 2023 01.
Artículo en Inglés | MEDLINE | ID: mdl-36526104

RESUMEN

Increasing time spent on the task (i.e., the time-on-task (ToT) effect) often results in mental fatigue. Typical effects of ToT are decreasing levels of task-related motivation and the deterioration of cognitive performance. However, a massive body of research indicates that the detrimental effects can be reversed by extrinsic motivators, for example, providing rewards to fatigued participants. Although several attempts have been made to identify brain areas involved in mental fatigue and related reward processing, the neural correlates are still less understood. In this study, we used the psychomotor vigilance task to induce mental fatigue and blood oxygen-level-dependent functional magnetic resonance imaging to investigate the neural correlates of the ToT effect and the reward effect (i.e., providing extra monetary reward after fatigue induction) in a healthy young sample. Our results were interpreted in a recently proposed neurocognitive framework. The activation of the right middle frontal gyrus, right insula and right anterior cingulate gyrus decreased as fatigue emerged and the cognitive performance dropped. However, after providing an extra reward, the cognitive performance, as well as activation of these areas, increased. Moreover, the activation levels of all of the mentioned areas were negatively associated with reaction times. Our results confirm that the middle frontal gyrus, insula and anterior cingulate cortex play crucial roles in cost-benefit evaluations, a potential background mechanism underlying fatigue, as suggested by the neurocognitive framework.


Asunto(s)
Encéfalo , Imagen por Resonancia Magnética , Humanos , Imagen por Resonancia Magnética/métodos , Encéfalo/fisiología , Motivación , Mapeo Encefálico/métodos , Recompensa , Fatiga Mental/diagnóstico por imagen
2.
BMC Med Educ ; 23(1): 381, 2023 May 25.
Artículo en Inglés | MEDLINE | ID: mdl-37231506

RESUMEN

BACKGROUND: The doctor-patient relationship has changed a lot in the 21st century and the varying expectations of the patients play an important role in future professional medical care. The knowledge of patients' needs is crucial in determining the learning outcomes in medical education. The objective of this study was to examine the expectations of the patients regarding professional and soft skills (e.g. communicational skills, empathy) of doctors and to get a deeper view. METHODS: Face-to face data collection through self-reported questionnaire in accredited health care institutions (GPs, hospitals, outpatient care) in Hungary was carried out in 2019. Descriptive statistics, independent sample t-tests, k-means cluster and gap matrices were performed to analyze the data. RESULTS: In total 1115 patients (male-female: 50-50%, age groups: between 18 and 30: 20%, between 31 and 60: 40% above 60: 40%) participated in the survey. They rated sixteen learning outcomes along with two dimensions: importance and satisfaction. Except for one learning outcome, patients rated the outcomes more important than they were satisfied with them (negative gap). Positive gap was registered only in the case of respecting individual specialty during patient care. CONCLUSIONS: The results suggest the importance of learning outcomes in relation to the rate of satisfaction from the patients' perspectives. In addition, the results support that patients' need are not met in medical care. Patients' ratings also make an emphasis on the fact that besides professional knowledge other learning outcomes are also important in health care which should have been emphasized as a basis in medical education.


Asunto(s)
Educación Médica , Estudiantes de Medicina , Humanos , Masculino , Femenino , Estudios Transversales , Hungría , Relaciones Médico-Paciente , Encuestas y Cuestionarios
3.
Behav Med ; 44(1): 28-35, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-27223330

RESUMEN

The aim of this study was to examine associations between exercise capacity-indexed as the metabolic equivalent of the task-and various aspects of subjective fatigue, physical functionality, and depression in patients with coronary artery disease. A cross-sectional design was used. Patients with stable coronary artery disease (N = 240) underwent an exercise stress test and completed self-report assessments of depression, subjective physical limitations, vital exhaustion, and the impact of fatigue on physical, social, and cognitive functions. Associations between exercise capacity and these self-report variables were assessed using bivariate correlations and a series of multivariate regressions. Exercise capacity was negatively associated with vital exhaustion, physical limitations, and impact of fatigue on physical and social functioning but not on cognitive functioning. There was a marginal association between exercise capacity and depression. The associations between exercise capacity and fatigue remained significant even after controlling for effects of age, body mass index, gender, education, and comorbid diabetes mellitus. The main conclusion of the study is that in patients with coronary artery disease, exercise capacity has the strongest predictability for physical fatigue, but, importantly, it also independently predicts the feeling of loss of energy and malaise.


Asunto(s)
Enfermedad de la Arteria Coronaria/psicología , Ejercicio Físico/psicología , Fatiga/psicología , Rendimiento Físico Funcional , Adulto , Anciano , Anciano de 80 o más Años , Cognición , Enfermedad de la Arteria Coronaria/complicaciones , Estudios Transversales , Depresión/complicaciones , Depresión/psicología , Prueba de Esfuerzo , Femenino , Humanos , Masculino , Persona de Mediana Edad
4.
Cogn Process ; 18(4): 349-357, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-28780698

RESUMEN

The aim of the present study was to compare junior and senior healthy participants for their multimodal integration capability. The instrument used for the investigation was the rubber hand illusion (RHI) where synchronous and asynchronous multimodal stimulation were applied. The study focused on assessing the rate of integration for visuo-tactile and visuo-proprioceptive stimuli. METHODS: From a large sample of right-handed volunteers, 50 senior employees (containing younger and middle age adults) and 51 senior retired (senior adults) participants were recruited. RESULTS: The between-subject analyses revealed that individuals both the junior and the senior participants responded to induction of RHI with vivid ownership and disownership experiences and a higher mislocalization error in the synchronous condition. However, the between-group analysis showed that participants in the senior group reported less vivid ownership and less vivid total RHI experiences scores compared to members of the junior group, but no mislocalization error differences were found between the groups. CONCLUSION: The results indicated that when visuo-tactile stimuli synchronously presented, the gain in multisensory integration decreased in seniors group. In contrast, in the case of visuo-proprioceptive synchronous presentation, the efficiency of multisensory integration remained unchanged across the lifespan.


Asunto(s)
Imagen Corporal , Mano , Ilusiones/fisiología , Propiocepción/fisiología , Percepción del Tacto/fisiología , Percepción Visual/fisiología , Adulto , Factores de Edad , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven
5.
Biol Psychol ; 185: 108727, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38056707

RESUMEN

Fatigue-specific changes in the autonomic nervous system are often assumed to underlie the development of mental fatigue caused by prolonged cognitive tasks (i.e. Time-on-Task). Therefore, several previous studies have chosen to investigate the Time-on-Task related changes in heart rate variability (HRV). However, previous studies have used many different HRV indices, and their results often show inconsistencies. The present study, therefore, systematically reviewed previous empirical HRV studies with healthy individuals and in which mental fatigue is induced by prolonged cognitive tasks. Articles relevant to the objectives were systematically searched and selected by applying the PRISMA guidelines. We screened 360 records found on 4 databases and found that 19 studies were eligible for full review in accordance with the inclusion criteria. In general, all studies reviewed (with the exception of two studies) found significant changes in HRV with increasing Time-on-Task, suggesting that HRV is a reliable autonomic marker for Time-on-Task induced fatigue. The most conclusive HRV indices that showed a consistent Time-on-Task effect were the low frequency component of HRV and the time domain indices, particularly the root mean square of successive differences. Time-on-Task typically induced an increasing trend in both type of measures.


Asunto(s)
Sistema Nervioso Autónomo , Frecuencia Cardíaca , Fatiga Mental , Humanos , Sistema Nervioso Autónomo/fisiología , Frecuencia Cardíaca/fisiología
6.
Bioelectromagnetics ; 34(7): 530-41, 2013 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-23787775

RESUMEN

One of the most frequently investigated effects of radiofrequency electromagnetic fields (RF EMFs) on the behavior of complex biological systems is pain sensitivity. Despite the growing body of evidence of EMF-induced changes in pain sensation, there is no currently accepted experimental protocol for such provocation studies for the healthy human population. In the present study, therefore, we tested the effects of third generation Universal Mobile Telecommunications System (UMTS) RF EMF exposure on the thermal pain threshold (TPT) measured on the surface of the fingers of 20 young adult volunteers. The protocol was initially validated with a topical capsaicin treatment. The exposure time was 30 min and the genuine (or sham) signal was applied to the head through a patch antenna, where RF EMF specific absorption rate (SAR) values were controlled and kept constant at a level of 1.75 W/kg. Data were obtained using randomized, placebo-controlled trials in a double-blind manner. Subjective pain ratings were tested blockwise on a visual analogue rating scale (VAS). Compared to the control and sham conditions, the results provide evidence for intact TPT but a reduced desensitization effect between repeated stimulations within the individual blocks of trials, observable only on the contralateral side for the genuine UMTS exposure. Subjective pain perception (VAS) data indicated marginally decreased overall pain ratings in the genuine exposure condition only. The present results provide pioneering information about human pain sensation in relation to RF EMF exposure and thus may contribute to cover the existing gap between safety research and applied biomedical science targeting the potential biological effects of environmental RF EMFs.


Asunto(s)
Teléfono Celular , Voluntarios Sanos , Umbral del Dolor/efectos de la radiación , Temperatura , Adolescente , Adulto , Capsaicina/farmacología , Femenino , Humanos , Masculino , Percepción del Dolor/efectos de los fármacos , Percepción del Dolor/efectos de la radiación , Umbral del Dolor/efectos de los fármacos , Factores de Tiempo , Adulto Joven
7.
Biol Futur ; 2023 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-37778004

RESUMEN

A large body of previous research has shown that emotional stimuli have an advantage in a wide variety of cognitive processes. This was mainly observed in visual search and working memory tasks. Emotionally charged objects draw and hold attention, are remembered better, and interfere more with the completion of the primary task than neutral ones. Therefore, it seems reasonable to assume that emotional stimuli also greatly affect sustained attention and vigilance decrement. In the present research, we investigated whether emotional stimuli demand more attentional resources than neutral ones in a dual-task paradigm. We adopted the abbreviated semantic discrimination vigilance task and measured participants' (N = 49) performance in a single-task and two dual-task settings. In the dual-task conditions, the visual semantic vigilance paradigm was combined with an auditory word recall task (with neutral or emotional stimuli). We found reduced vigilance and improved word recall performance in the emotional dual-task condition compared to the neutral dual-task and single-task conditions. The reduced performance was apparent throughout the task, while in the neutral conditions, participants' performance first increased and then dropped as time progressed. To conclude, our results indicate that emotional stimuli not only have an advantage in cognitive processing but also demand more attentional resources continuously while it is present compared to neutral stimuli. These results are consistent with the emotionality effect theory and evolutionary accounts of the neural circuits underlying motivated behaviors associated with critical survival needs.

8.
Biol Futur ; 2023 Oct 27.
Artículo en Inglés | MEDLINE | ID: mdl-37889452

RESUMEN

Neuroimaging studies investigating the association between mental fatigue (henceforth fatigue) and brain physiology have identified many brain regions that may underly the cognitive changes induced by fatigue. These studies focused on the functional changes and functional connectivity of the brain relating to fatigue. The structural correlates of fatigue, however, have received little attention. To fill this gap, this study explored the associations of fatigue with cortical thickness of frontal and parietal regions. In addition, we aimed to explore the associations between reward-induced improvement in performance and neuroanatomical markers in fatigued individuals. Thirty-nine healthy volunteers performed the psychomotor vigilance task for 15 min (i.e., 3 time-on-task blocks of 5 min) out of scanner; followed by an additional rewarded block of the task lasting 5 min. Baseline high-resolution T1-weigthed MR images were obtained. Reaction time increased with time-on-task but got faster again in the rewarded block. Participants' subjective fatigue increased during task performance. In addition, we found that higher increase in subjective mental fatigue was associated with the cortical thickness of the following areas: bilateral precuneus, right precentral gyrus; right pars triangularis and left superior frontal gyrus. Our results suggest that individual differences in subjective mental fatigue may be explained by differences in the degree of cortical thickness of areas that are associated with motor processes, executive functions, intrinsic alertness and are parts of the default mode network.

10.
BMC Psychol ; 10(1): 97, 2022 Apr 10.
Artículo en Inglés | MEDLINE | ID: mdl-35399087

RESUMEN

BACKGROUND: Socioeconomic disadvantages in the childhood environment might strongly influence beliefs and behavior characterizing the adult years. When children experience unpredictable and adverse situations, they develop an unpredictability schema with the core belief that situations are unpredictable. METHODS: In two studies, we examined the association of childhood socioeconomic disadvantages with self-reported pain sensitivity, pain catastrophizing, and pain-related fear. Multidimensional survey measures were used to assess environmental conditions experienced in childhood. In addition, participants completed the Pain Catastrophizing Scale, Pain Sensitivity Questionnaire, Body Awareness Questionnaire, Unpredictability Schema Questionnaire, and Fear of Pain Questionnaire. In Study 1 (N = 252), in separate models, we examined pain sensitivity and pain catastrophizing of a community sample of pain-free young individuals in association with their childhood experiences. In Study 2 (N = 293), in a new sample, but with a wider age range, we examined the association of early life socioeconomic disadvantages with pain-related fear. In both studies, the predictions were tested with Structural Equation Modeling. Our models constituted a path from childhood socioeconomic status and household unpredictability to pain variables via the factors of family resources, unpredictability schemas, and body awareness. RESULTS AND CONCLUSIONS: The findings converged on the conclusion that individuals experiencing disadvantageous early life conditions tended to have an elevated level of pain catastrophizing, higher perceived sensitivity to pain, and higher level of pain-related fear. These associations were mediated by an unpredictability schema and body awareness.


Asunto(s)
Catastrofización , Trastornos Fóbicos , Adulto , Niño , Miedo , Humanos , Dolor , Encuestas y Cuestionarios
11.
Anxiety Stress Coping ; 35(2): 248-258, 2022 03.
Artículo en Inglés | MEDLINE | ID: mdl-33853454

RESUMEN

Medical Fear Survey (MFS) was designed to assess the fear of medical treatments and related factors through five dimensions including fears of injections and blood draws, sharp objects, blood, mutilation, medical examination and physical symptoms. We analysed the factor structure and validity of a short version of MFS in Hungarian, on a large sample (2631 participants; 558 men, 2067 women) focusing on possible age and gender differences (aged Mean = 30.4, SD = 13.4), which were not reported for the original version. Furthermore, using discriminant analysis, potential screening function of the MFS-short was examined. Results supported construct and convergent validity and scale-reliability for the five-factor structure of the MFS-short. Further analyses demonstrated excellent discriminatory power for four subscales, while one subscale had acceptable power. Our findings provide implications for the utility of MFS-short as a screening measure in assessing the severity of medical fears controlling for gender differences and age-biases.


Asunto(s)
Miedo , Anciano , Femenino , Humanos , Hungría , Masculino , Psicometría , Reproducibilidad de los Resultados , Factores Sexuales , Encuestas y Cuestionarios
12.
Sci Rep ; 12(1): 20023, 2022 11 21.
Artículo en Inglés | MEDLINE | ID: mdl-36414673

RESUMEN

A prolonged period of cognitive performance often leads to mental fatigue, a psychobiological state that increases the risk of injury and accidents. Previous studies have trained machine learning algorithms on Heart Rate Variability (HRV) data to detect fatigue in order to prevent its consequences. However, the results of these studies cannot be generalised because of various methodological issues including the use of only one type of cognitive task to induce fatigue which makes any predictions task-specific. In this study, we combined the datasets of three experiments each of which applied different cognitive tasks for fatigue induction and trained algorithms that detect fatigue and predict its severity. We also tested different time window lengths and compared algorithms trained on resting and task related data. We found that classification performance was best when the support vector classifier was trained on task related HRV calculated for a 5-min time window (AUC = 0.843, accuracy = 0.761). For the prediction of fatigue severity, CatBoost regression showed the best performance when trained on 3-min HRV data and self-reported measures (R2 = 0.248, RMSE = 17.058). These results indicate that both the detection and prediction of fatigue based on HRV are effective when machine learning models are trained on heterogeneous, multi-task datasets.


Asunto(s)
Aprendizaje Automático , Fatiga Mental , Humanos , Frecuencia Cardíaca/fisiología , Algoritmos , Descanso
13.
Q J Exp Psychol (Hove) ; 75(4): 565-582, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-34507504

RESUMEN

Top-down cognitive control seems to be sensitive to the detrimental effects of fatigue induced by time-on-task (ToT). The planning and preparation of the motor responses may be especially vulnerable to ToT. Yet, effects of ToT specific to the different phases of movements have received little attention. Therefore, in three experiments, we assessed the effect of ToT on a mouse-pointing task. In Experiment 1, there were 16 possible target positions with variable movement directions. In Experiment 2, the layout of the targets was simplified. In Experiment 3, using cuing conditions, we examined whether the effects of ToT on movement preparation and execution were caused by an increased orientation deficit or decreased phasic alertness. In each experiment, initiation of movement (preparatory phase) became slower, movement execution became faster and overall response time remained constant with increasing ToT. There was, however, no significant within-person association between the preparatory and execution phases. In Experiments 1 and 2, we found a decreasing movement time/movement error ratio, suggesting a more impulsive execution of the pointing movement. In addition, ToT was also accompanied with imprecise movement execution as indicated by the increased errors, mainly in Experiment 2. The results of Experiment 3 indicated that ToT did not induce orientation and phasic alerting deficits but rather was accompanied by decreased tonic alertness.


Asunto(s)
Movimiento , Desempeño Psicomotor , Animales , Atención , Señales (Psicología) , Ratones , Movimiento/fisiología , Desempeño Psicomotor/fisiología , Tiempo de Reacción/fisiología
14.
Acta Psychol (Amst) ; 224: 103536, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35192995

RESUMEN

People's attitudes toward time, the time perspectives (TPs) rooted in past experiences, might be crucial for the emotional evaluation of life events, such as painful situations. In a survey-based study (N = 353), we investigated the relationship of TPs with the self-perceived affective and physical aspects of pain. Specifically, we hypothesised that past-negative TP would be associated with a negative emotional appraisal of pain characterised by higher pain-related catastrophizing, fear, and physical sensitivity to pain. We tested this hypothesis with hierarchical regression models, adding depression, anxiety, and variables of early life circumstances to the model stepwise. Early life circumstances (i.e., socioeconomic status, household unpredictability, and family resources) were measured retrospectively using questionnaires. In addition, based on the results of the regression analyses, we built a structural equation model (SEM) and tested whether past-negative mediates the effect of household unpredictability toward emotional and physical appraisal of pain. We found that individuals scoring high on past-negative TP had greater pain catastrophizing, pain-related fear, and sensitivity to pain. Further, there was evidence that these associations are independent from depression, anxiety, and early life circumstances. Finally, SEM analysis suggested that unpredictable early life circumstances were directed toward intense, negatively emotionalised pain perception via the mediation of the past-negative TP. The findings generally support the view that pain behaviour is formed by emotional states and attitudes that are linked to past experiences that are not necessarily specific to the context of pain.


Asunto(s)
Ansiedad , Depresión , Ansiedad/psicología , Trastornos de Ansiedad/psicología , Depresión/psicología , Humanos , Dolor , Estudios Retrospectivos
15.
BMJ Open ; 12(8): e059493, 2022 08 23.
Artículo en Inglés | MEDLINE | ID: mdl-35998961

RESUMEN

OBJECTIVES: The current global health crisis of the COVID-19 pandemic has drastically affected the whole population, but healthcare workers are particularly exposed to high levels of physical and mental stress. This enormous burden requires both the continuous monitoring of their health conditions and research into various protective factors. DESIGN: Cross-sectional surveys. SETTING AND PARTICIPANTS: Self-administered questionnaires were constructed assessing COVID-19-related worries of health workers in Hungary. The surveys were conducted during two consecutive waves of the COVID-19 pandemic (N-first wave=376, N-second wave=406), between 17 July 2020 and 31 December 2020. PRIMARY AND SECONDARY OUTCOME MEASURES: COVID-19-related worry, well-being and distress levels of healthcare workers. We also tested whether psychological resilience mediates the association of worry with well-being and distress. Multiple linear regression analyses were performed. RESULTS: The results indicated that healthcare workers had high levels of worry and distress in both pandemic waves. When comparing the two waves, enhanced levels of worry (Wald's χ2=4.36, p=0.04) and distress (Wald's χ2=25.18, p<0.001), as well as compromised well-being (Wald's χ2=58.64, p<0.001), were found in the second wave. However, not all types of worries worsened to the same extent across the waves drawing attention to some specific COVID-19-sensitive concerns. Finally, the protective role of psychological resilience was shown by a mediator analysis suggesting the importance of increasing resilience as a key factor in maintaining the mental health of healthcare workers in the burden of the COVID-19 pandemic. CONCLUSIONS: Our results render the need for regular psychological surveillance in healthcare workers. REGISTRATION: Hungarian Scientific and Research Ethics Committee of the Medical Research Council (IV/5079-2/2020/EKU).


Asunto(s)
COVID-19 , COVID-19/epidemiología , Estudios Transversales , Personal de Salud/psicología , Humanos , Salud Mental , Pandemias , Encuestas y Cuestionarios
16.
BMJ Open ; 12(1): e050821, 2022 Jan 04.
Artículo en Inglés | MEDLINE | ID: mdl-34983758

RESUMEN

BACKGROUND/OBJECTIVES: Acute recurrent pancreatitis (ARP) due to alcohol and/or tobacco abuse is a preventable disease which lowers quality of life and can lead to chronic pancreatitis. The REAPPEAR study aims to investigate whether a combined patient education and cessation programme for smoking and alcohol prevents ARP. METHODS AND ANALYSIS: The REAPPEAR study consists of an international multicentre randomised controlled trial (REAPPEAR-T) testing the efficacy of a cessation programme on alcohol and smoking and a prospective cohort study (REAPPEAR-C) assessing the effects of change in alcohol consumption and smoking (irrespective of intervention). Daily smoker patients hospitalised with alcohol-induced acute pancreatitis (AP) will be enrolled. All patients will receive a standard intervention priorly to encourage alcohol and smoking cessation. Participants will be subjected to laboratory testing, measurement of blood pressure and body mass index and will provide blood, hair and urine samples for later biomarker analysis. Addiction, motivation to change, socioeconomic status and quality of life will be evaluated with questionnaires. In the trial, patients will be randomised either to the cessation programme with 3-monthly visits or to the control group with annual visits. Participants of the cessation programme will receive a brief intervention at every visit with direct feedback on their alcohol consumption based on laboratory results. The primary endpoint will be the composite of 2-year all-cause recurrence rate of AP and/or 2-year all-cause mortality. The cost-effectiveness of the cessation programme will be evaluated. An estimated 182 participants will be enrolled per group to the REAPPEAR-T with further enrolment to the cohort. ETHICS AND DISSEMINATION: The study was approved by the Scientific and Research Ethics Committee of the Hungarian Medical Research Council (40394-10/2020/EÜIG), all local ethical approvals are in place. Results will be disseminated at conferences and in peer-reviewed journals. TRIAL REGISTRATION NUMBER: NCT04647097.


Asunto(s)
Fumar Cigarrillos , Pancreatitis , Enfermedad Aguda , Estudios de Cohortes , Humanos , Estudios Multicéntricos como Asunto , Pancreatitis/etiología , Pancreatitis/prevención & control , Estudios Prospectivos , Calidad de Vida , Ensayos Clínicos Controlados Aleatorios como Asunto , Nicotiana
17.
Bioelectromagnetics ; 32(2): 131-9, 2011 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21225890

RESUMEN

In the present experiment, the effect of a single 30 min inhomogeneous static magnetic field (SMF) exposure on thermal pain threshold (TPT) was examined in 15 young healthy human volunteers. The SMF had a maximum peak-to-peak amplitude of 330 mT with a maximum gradient of 13.2 T/m. In either of two experimental sessions (SMF or SHAM), four blocks of 12 TPT trials were carried out under SMF or SHAM exposure on all fingertips of the dominant hand, excluding the thumb. TPT and visual analog scale (VAS) data were recorded at 0, 15, and 30 min exposure time, and 30 min following exposure. SMF treatment resulted in a statistically significant increase in TPT during the entire exposure duration and diminished within-block thermal habituation, leaving pain perception unchanged. These results indicate that SMF-induced peripheral neuronal or circulatory mechanisms may be involved in the observed TPT increase by setting the pain fibre adaptation potential to higher levels.


Asunto(s)
Salud , Magnetoterapia/métodos , Umbral del Dolor , Temperatura , Adolescente , Adulto , Femenino , Humanos , Hiperalgesia/terapia , Masculino , Adulto Joven
18.
PLoS One ; 16(3): e0238670, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33657124

RESUMEN

Heart Rate Variability (HRV) has been suggested as a useful tool to assess fatigue-sensitive psychological operations. The present study uses a between and within-subject design with a cognitively demanding task and a documentary viewing condition, to examine the temporal profile of HRV during reactivity, Time-on-Task (ToT), and recovery. In the cognitive task group, participants worked on a bimodal 2-back task with a game-like character (the Gatekeeper task) for about 1.5 hours, followed by a 12-minute break, and a post-break block of performance (about 18 min). In the other group, participants watched documentaries. We hypothesized an increasing vagal-mediated HRV as a function of Time spent on the Gatekeeper task and no HRV change in the documentary viewing group. We also analyzed the trial-based post-response cardiac activity as a physiological associate of task-related motivation. Relative to the documentary-viewing, ToT was associated with an elevated level of subjective fatigue, decreased heart rate, and increased HRV, particularly in the vagal-mediated components. Based on fatigued participants' post-error cardiac slowing, and post-error reaction time analyses, we found no evidence for motivation deficits. The present findings suggest that the parasympathetic branch of the autonomous nervous system functioning as a relaxation system tends to be activated under increasing mental fatigue. In addition, the study shows that many HRV indices also seem to change when individuals are engaged in a prolonged, less fatiguing activity (e.g. documentary viewing). This finding emphasizes the relevance of comparisons/control conditions in ToT experiments.


Asunto(s)
Frecuencia Cardíaca , Fatiga Mental , Adulto , Arritmias Cardíacas , Femenino , Corazón/fisiología , Humanos , Masculino , Tiempo de Reacción , Nervio Vago/fisiología , Adulto Joven
19.
Br J Psychol ; 111(4): 665-682, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-31633809

RESUMEN

Although large body of research has demonstrated the attention-grabbing nature of threat-related stimuli, threat could also facilitate attentional processes. Previous studies suggest a linear relationship between the facilitating effect of the arousal level conveyed by threat and performance on visual search tasks. Due to the temporal competition bias favouring stimuli with higher arousal level, this could be more pronounced for shorter onset times. Here, through two experiments we aimed to disentangle the two effects by using a visual search paradigm that allowed us to separate the emotional stimuli and the cognitive task. We manipulated stimulus onset time and threat intensity. Participants saw neutral and threatening pictures as priming stimuli, and then, they had to find numbers in ascending order in a matrix array. We measured the reaction time for finding the first number, and search time for finding all the numbers. Our results showed that when the priming stimulus is presented, longer threatening pictures produced longer reaction times compared to neutral ones, which was reversed with increase in arousal. We did not find any significant effects for the shorter onset time. Further theoretical and methodological implications are discussed.


Asunto(s)
Atención , Cognición , Emociones , Tiempo de Reacción , Animales , Miedo , Femenino , Humanos , Masculino , Adulto Joven
20.
Trials ; 21(1): 809, 2020 Sep 29.
Artículo en Inglés | MEDLINE | ID: mdl-32993779

RESUMEN

BACKGROUND: Early reports indicate that COVID-19 may require intensive care unit (ICU) admission in 5-26% and overall mortality can rise to 11% of the recognised cases, particularly affecting the elderly. There is a lack of evidence-based targeted pharmacological therapy for its prevention and treatment. We aim to compare the effects of a World Health Organization recommendation-based education and a personalised complex preventive lifestyle intervention package (based on the same WHO recommendation) on the outcomes of the COVID-19. METHODS: PROACTIVE-19 is a pragmatic, randomised controlled clinical trial with adaptive "sample size re-estimation" design. Hungarian population over the age of 60 years without confirmed COVID-19 will be approached to participate in a telephone health assessment and lifestyle counselling voluntarily. Volunteers will be randomised into two groups: (A) general health education and (B) personalised health education. Participants will go through questioning and recommendation in 5 fields: (1) mental health, (2) smoking habits, (3) physical activity, (4) dietary habits, and (5) alcohol consumption. Both groups A and B will receive the same line of questioning to assess habits concerning these topics. Assessment will be done weekly during the first month, every second week in the second month, then monthly. The composite primary endpoint will include the rate of ICU admission, hospital admission (longer than 48 h), and mortality in COVID-19-positive cases. The estimated sample size is 3788 subjects per study arm. The planned duration of the follow-up is a minimum of 1 year. DISCUSSION: These interventions may boost the body's cardiovascular and pulmonary reserve capacities, leading to improved resistance against the damage caused by COVID-19. Consequently, lifestyle changes can reduce the incidence of life-threatening conditions and attenuate the detrimental effects of the pandemic seriously affecting the older population. TRIAL REGISTRATION: The study has been approved by the Scientific and Research Ethics Committee of the Hungarian Medical Research Council (IV/2428- 2 /2020/EKU) and has been registered at clinicaltrials.gov ( NCT04321928 ) on 25 March 2020.


Asunto(s)
Betacoronavirus/patogenicidad , Infecciones por Coronavirus/prevención & control , Educación en Salud , Conocimientos, Actitudes y Práctica en Salud , Pandemias/prevención & control , Neumonía Viral/prevención & control , Conducta de Reducción del Riesgo , Ensayos Clínicos Adaptativos como Asunto , Factores de Edad , Anciano , Anciano de 80 o más Años , Consumo de Bebidas Alcohólicas/efectos adversos , COVID-19 , Infecciones por Coronavirus/diagnóstico , Infecciones por Coronavirus/mortalidad , Infecciones por Coronavirus/virología , Ejercicio Físico , Conducta Alimentaria , Femenino , Estado de Salud , Interacciones Huésped-Patógeno , Humanos , Hungría , Masculino , Salud Mental , Persona de Mediana Edad , Neumonía Viral/diagnóstico , Neumonía Viral/mortalidad , Neumonía Viral/virología , Ensayos Clínicos Pragmáticos como Asunto , Factores Protectores , Medición de Riesgo , Factores de Riesgo , SARS-CoV-2 , Fumar/efectos adversos
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