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Early Adverse Life Events and Resting State Neural Networks in Patients With Chronic Abdominal Pain: Evidence for Sex Differences
Gupta, Arpana PhD; Kilpatrick, Lisa PhD; Labus, Jennifer PhD; Tillisch, Kirsten MD; Braun, Adam BSc; Hong, Jui-Yang BSc; Ashe-McNalley, Cody BSc; Naliboff, Bruce PhD; Mayer, Emeran A. MD, PhD
Background: Early adverse life events (EALs) and sex have been identified as vulnerability factors for the development of several stress-sensitive disorders, including irritable bowel syndrome (IBS). We aimed to identify disease and sex-based differences in resting state (RS) connectivity associated with EALs in individuals with IBS.
Method: A history of EALs before age 18 years was assessed using the early trauma inventory. RS functional magnetic resonance imaging was used to identify patterns of intrinsic brain oscillations in the form of RS networks in 168 people (58 people with IBS, 28 were female; 110 healthy controls, 72 were female). Partial least squares, a multivariate analysis technique, was used to identify disease and sex differences and possible correlations between EALs and functional connectivity in six identified RS networks.
Results: Associations between EALs and RS networks were observed. Although a history of EALs was associated with altered connectivity in the salience/executive control network to a similar extent in male and female patients with IBS (bootstrap ratio = 3.28–5.61; p = .046), male patients with IBS demonstrated additional EAL-related alterations in the cerebellar network (bootstrap ratio = 3.92–6.79; p = .022).
Conclusions: This cross sectional study identified correlations between RS networks and EALs in individuals with IBS. These results suggest that exposure to EALs before age 18 years can shape adult RS in both male and female patients in the salience/executive control network, a brain network that has been implicated in the pathophysiology of central pain amplification.
Copyright © 2014 by American Psychosomatic Society
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Readers Of this Article Also Read
early adverse traumatic life events, irritable bowel syndrome, resting state networks, salience/executive control network, cerebellar network, sex differences, EAL = early adverse life event, IBS = irritable bowel syndrome, RS = resting state, HCs = healthy controls, THAL = thalamus, INS = insula, ACC = cingulate cortex, ETI = Early Traumatic Inventory, HAD = Hospital Anxiety and Depression Inventory, RT = repetition time, TE = echo time, TA = resting duration, BOLD = functional blood oxygen-level dependent, FOV = field of view, ANOVA = analysis of variance, EALs = early adverse life events, RSN = resting state networks, MCC = mid cingulate cortex, IPG = inferior parietal gyrus, SFG = superior frontal gyrus, MFG = middle frontal gyrus, IFG = inferior frontal gyrus, ITG = inferior temporal gyrus, MOG = middle occipital gyrus, SMA = supplementary motor area, BA = Broadmann's area, BSR = bootstrap ratio