Abstract:
UNLABELLED:The neural correlates of response to psychosocial stress and gender differences therein are difficult to model experimentally as this type of stressor is difficult to induce in a brain imaging environment. The Trier Social Stress Test (TSST), a behavioral paradigm that reliably induces moderate levels of stress was thus modified for the MRI environment. To determine the neurobehavioral basis of gender differences in response to observing oneself under social evaluative stress, 26 subjects (14 females) performed the TSST while being videotaped. During fMRI scanning, subjects were shown alternating video clips of two CONDITIONS:SELF or a same-sex OTHER performing the TSST. Subjects rated their stress level immediately after the video clips. GENDER differences in the [SELF-OTHER] contrast were analyzed. There was a GENDER×CONDITION interaction such that only women reported increased subjective stress during video feedback of their TSST session. A whole brain analysis (SELF vs. OTHER) showed activation in the bilateral insula, inferior, middle and superior frontal gyri. Greater recruitment was seen among males in some of these same areas in the context of significantly lower stress ratings. Activation of areas involved in inhibitory control and sensory awareness might contribute to the significantly lower stress ratings in males. Understanding these gender differences is relevant to disorders of stress and self-concept.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Lee MR,Cacic K,Demers CH,Haroon M,Heishman S,Hommer DW,Epstein DH,Ross TJ,Stein EA,Heilig M,Salmeron BJdoi
10.1016/j.neuropsychologia.2013.11.022subject
Has Abstractpub_date
2014-01-01 00:00:00pages
257-63eissn
0028-3932issn
1873-3514pii
S0028-3932(13)00419-3journal_volume
53pub_type
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