Disrupted regional homogeneity in treatment-resistant depression: a resting-state fMRI study.

Abstract:

BACKGROUND:Using a newly developed regional homogeneity (ReHo) approach, we were to explore the features of brain activity in patients with treatment-resistant depression (TRD) in resting state, and further to examine the relationship between abnormal brain activity in TRD patients and specific symptom factors derived from ratings on the Hamilton Rating Scale for Depression (HRSD). METHODS:24 patients with TRD and 19 gender-, age-, and education-matched healthy subjects participated in the fMRI scans. RESULTS:1. Compared with healthy controls, decreased ReHo were found in TRD patients in the left insula, superior temporal gyrus, inferior frontal gyrus, lingual gyrus and cerebellumanterior lobe (culmen) (p<0.05, corrected). 2. Compared with healthy controls, increased ReHo were found in the left superior temporal gyrus, cerebellum posterior lobe (tuber), cerebellum anterior lobe (culmen), the right cerebellar tonsil and bilateral fusiform gyrus (p<0.05, corrected). 3. There was no correlation between the ReHo values in any brain region detected in our study and the patients' age, years of education, illness duration, HRSD total score and its symptom factors. LIMITATION:The influence of antidepressants to the brain activity in TRD patients was not fully eliminated. CONCLUSIONS:The pathogenesis of TRD may be attributed to abnormal neural activity in multiple brain regions.

authors

Guo WB,Sun XL,Liu L,Xu Q,Wu RR,Liu ZN,Tan CL,Chen HF,Zhao JP

doi

10.1016/j.pnpbp.2011.02.006

subject

Has Abstract

pub_date

2011-07-01 00:00:00

pages

1297-302

issue

5

eissn

0278-5846

issn

1878-4216

pii

S0278-5846(11)00060-1

journal_volume

35

pub_type

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