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2015 ; 8
(ä): 455-61
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Dysfunction of ventrolateral prefrontal cortex underlying social anxiety
disorder: A multi-channel NIRS study
#MMPMID26106570
Yokoyama C
; Kaiya H
; Kumano H
; Kinou M
; Umekage T
; Yasuda S
; Takei K
; Nishikawa M
; Sasaki T
; Nishimura Y
; Hara N
; Inoue K
; Kaneko Y
; Suzuki S
; Tanii H
; Okada M
; Okazaki Y
Neuroimage Clin
2015[]; 8
(ä): 455-61
PMID26106570
show ga
Social anxiety disorder (SAD) is characterized by strong fear and anxiety during
social interactions. Although ventrolateral prefrontal cortex (VLPFC) activity in
response to emotional stimuli is related to pathological anxiety, little is known
about the relationship between VLPFC activity and social anxiety. This study
aimed to investigate whether VLPFC activity was involved in SAD and whether VLPFC
activity was related to the level of social anxiety. Twenty-four drug-naïve
patients with SAD and 35 healthy controls underwent near-infrared spectroscopy
(NIRS) scanning while performing a verbal fluency task (VFT). Results indicated
that, compared to the healthy controls, the SAD patients exhibited smaller
changes of oxygenated hemoglobin (oxy-Hb) concentrations in the VLPFC during the
VFT. Furthermore, the right VLPFC activation was negatively correlated with
social avoidance. In contrast to the latter, the healthy controls exhibited a
positive correlation between changes of oxy-Hb concentrations in the bilateral
VLPFC and social fear. Our findings provide evidence for VLPFC dysfunction in
SAD, and indicate that the VLPFC dysfunction may contribute to the difference
between normal and abnormal social anxiety.