High‐resolution ultrasound demonstrates in vivo effects of wrist movement on the median nerve along the forearm

Introduction/Aims High‐resolution ultrasound (HRUS) is the imaging method of choice to visualize peripheral nerve size, structure, and biomechanical performance. The purpose of this study was to show and quantify the effects of active and passive wrist alignment on median nerve (MN) cross‐sectional area (CSA) along the forearm in a healthy population. Methods Sixteen healthy volunteers underwent HRUS of their dominant forearm (n = 16, 10 males, 6 females, 18–55 y of age). Median nerveʼs CSA was assessed at four defined areas on the forearm in relation to active and passive wrist alignment. Results Changes in wrist alignment were significantly associated with MN CSA (P