Key result
High-resolution ultrasound detects reduced vagus nerve cross-sectional area in Parkinson's disease versus healthy controls.
May support vagus nerve ultrasound as a noninvasive biomarker for Parkinson's disease; strengthens aggregated evidence for its diagnostic utility.
To evaluate whether the vagus nerve (VN) cross-sectional area (CSA), measured by high-resolution ultrasound, differs between Parkinson’s disease (PD) patients and healthy controls.
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Sousa et al. (2026) studied this question. High-resolution ultrasound demonstrates reduced vagus nerve cross-sectional area in patients with Parkinson's disease compared to healthy controls.
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