Neuroimaging studies of alexithymia: physical, affective, and social perspectives

BioPsychoSocial Medicine

Yoshiya Moriguchi²  Gen Komaki¹ 

[1] Fukuoka School of Rehabilitation Sciences, International University of Health and Welfare, 137-1, Enokizu, Ohkawa, Fukuoka, 831-0004, Japan

[2] Integrative Brain Imaging Center, National Center of Neurology and Psychiatry4-1-1 Ogawahigashi, Kodaira, Tokyo, 187-0031, Japan

关键词: Emotional awareness;    Psychosomatic medicine;    Interoception;    Neuroimaging study;    PET;    fMRI;    Alexithymia;   

Others  :  1084178
DOI  :  10.1186/1751-0759-7-8

 received in 2012-11-08, accepted in 2013-03-20,  发布年份 2013

【 摘 要 】

Alexithymia refers to difficulty in identifying and expressing one’s emotions, and it is related to disturbed emotional regulation. It was originally proposed as a personality trait that plays a central role in psychosomatic diseases. This review of neuroimaging studies on alexithymia suggests that alexithymia is associated with reduced neural responses to emotional stimuli from the external environment, as well as with reduced activity during imagery, in the limbic and paralimbic areas (i.e., amygdala, insula, anterior/posterior cingulate cortex). In contrast, alexithymia is also known to be associated with enhanced neural activity in somatosensory and sensorimotor regions, including the insula. Moreover, neural activity in the medial, prefrontal, and insula cortex was lowered when people with alexithymia were involved in social tasks. Because most neuroimaging studies have been based on sampling by self-reported questionnaires, the contrasted features of neural activities in response to internal and external emotional stimuli need to be elucidated. The social and emotional responses of people with alexithymia are discussed and recommendations for future research are presented.

【 授权许可】

   
2013 Moriguchi and Komaki; licensee BioMed Central Ltd.

【 图 表 】

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