Anterior hippocampal grey matter predicts mental health outcome in functional neurological disorders: an exploratory pilot study

Introduction

Advancements in the management of FND emphasise a 'rule-in' diagnosis and roles for cognitive behavioural therapy (CBT)1 and physical therapy (PT).2 Neuroimaging studies have also started delineating the neuropathophysiology of FND.3 In the same cohort as this present study, we previously identified that impaired mental health and increased trait anxiety correlated with individual differences in amygdalar volume in patients with FND, while diminished physical functioning was associated with reduced anterior insular volume.4 In FND, the magnitude of adverse life event burden also correlated with decreased insular and hippocampal volumes.5

This pilot voxel-based morphometry (VBM) study used a within-group design to investigate the relationship between baseline volumetric profiles and prospectively collected 6-month outcome data in 22 patients with FND. Stratified comparative analyses with 27 controls were performed to contextualise statistically significant within-group findings. Based on the outcome literature6 and previously...

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