High-resolution sonographic study of the communicating branch of Berrettini: an anatomical feasibility study.

Sensory changes are common manifestations of nerve complications of carpal tunnel surgery. Division or contusion of a superficial communicating branch between the median nerve and the ulnar nerve, the communicating branch of Berrettini, can explain these symptoms. The aim of this study was to describe the potential value of high-resolution sonography to examine this branch.