Gender Differences in Functional Connectivities Between Insular Subdivisions and Selective Pain-related Brain Structures

Overview

Journal J Headache Pain

Publisher Biomed Central

Date 2018 Mar 16

PMID 29541875

Citations 16

Authors

Yu-Jie Dai

Xin Zhang

Yang Yang

Hai-Yan Nan

Ying Yu

Qian Sun

Lin-Feng Yan

Bo Hu

Jin Zhang

Zi-Yu Qiu

Yi Gao

Guang-Bin Cui

Bi-Liang Chen

Wen Wang

Affiliations

Soon will be listed here.

Abstract

Background: The incidence of pain disorders in women is higher than in men, making gender differences in pain a research focus. The human insular cortex is an important brain hub structure for pain processing and is divided into several subdivisions, serving different functions in pain perception. Here we aimed to examine the gender differences of the functional connectivities (FCs) between the twelve insular subdivisions and selected pain-related brain structures in healthy adults.

Methods: Twenty-six healthy males and 11 age-matched healthy females were recruited in this cross-sectional study. FCs between the 12 insular subdivisions (as 12 regions of interest (ROIs)) and the whole brain (ROI-whole brain level) or 64 selected pain-related brain regions (64 ROIs, ROI-ROI level) were measured between the males and females.

Results: Significant gender differences in the FCs of the insular subdivisions were revealed: (1) The FCs between the dorsal dysgranular insula (dId) and other brain regions were significantly increased in males using two different techniques (ROI-whole brain and ROI-ROI analyses); (2) Based on the ROI-whole brain analysis, the FC increases in 4 FC-pairs were observed in males, including the left dId - the right median cingulate and paracingulate/ right posterior cingulate gyrus/ right precuneus, the left dId - the right median cingulate and paracingulate, the left dId - the left angular as well as the left dId - the left middle frontal gyrus; (3) According to the ROI-ROI analysis, increased FC between the left dId and the right rostral anterior cingulate cortex was investigated in males.

Conclusion: In summary, the gender differences in the FCs of the insular subdivisions with pain-related brain regions were revealed in the current study, offering neuroimaging evidence for gender differences in pain processing.

Trial Registration: ClinicalTrials.gov, NCT02820974 . Registered 28 June 2016.

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