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PSYCHOSOCIAL STRESS EFFECTS ON PHYSIOLOGICAL RESPONSE IN SUBJECTS WITH HIGHER AND LOWER PSYCHOPATHY SCORES
Autores:
LAURA ESPIN LOPEZ
,
JESUS GOMEZ AMOR
, TIAGO OLIVEIRA PAIVA, ALICIA SALVADOR FERNÁNDEZ-MONTEJO, JOAO MARQUES TEIXEIRA, FERNANDO DOS SANTOS BARBOSA,
Grupos de investigación:
[GI/IMIB/C044/2011] PSICOBIOLOGÍA Y NEUROBIOLOGÍA DEL COMPORTAMIENTO
Comunicación:
Antecedentes:
There is evidence in the literature for a blunted cortisol response and diminished autonomic activity in men with high psychopathic traits. In the present study we tested whether variations in psychopathic personality traits are related to cortisol production and autonomic activation in men and women exposed to a standardized psychosocial stressor (Trier Social Stress Test, TSST).
Métodos:
Fifty three subjects (27 male) were selected through a general health questionnaire to become part of the study (Mage =22.64 , SD =4.42). The sample was divided into higher and lower psychopathy groups by the median-split of the total TriPM score on women and men. For the cardiac and cognitive functions measures we report data from 44 subjects, 22 male (Mage = 22.06 yeas old, SD = 4.43). The autonomic activity was continuously measured with a device watch POLAR and registered with different parameters of cardiovascular activity, such as heart rate (HR) and heart rate variability (RR distance and RMSSD). Three salivary hormone samples were taken prior to task (C1: t-40; C2: t-30; C3: t-10), and five samples (C4: t0; C5: t+15; C6: t+20; C7: t+30; C8: t+40) were taken with reference to the beginning of the stressor. In order to assess the cognitive function, we used an emotional memory task based on the recognition of affective pictures (selected from IAPS).
Resultados:
We confirm the low reactivity of the HPA axis and of autonomic nervous system to stress in the high psychopathy group. Furthermore, we found that the HPA axis response to stress is different for men and women with high psychopathic women showing a decrease in cortisol response during the phases of TSST. At cognitive level, we found that men with low psychopathy revealed higher reaction times to the recognition of affective pictures task, when compared with women with low psychopathy.
Conclusiones:
Our results confirm previous studies and provide a more complete view of the possible neurobiological deficits associated with psychopathy integrating psychophysiological and memory measures.
Instituto de Investigación Sanitaria Acreditado
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