Frequency of Type-1 Berrettini's Connection in a Neurophysiology Laboratory.

 This study aims to estimate the frequency of Berrettini's ulnar-median nerves communication in a neurophysiology laboratory.  A total of 358 hands belonging to patients, both sexes, median age of 58 years, was studied. Antidromic sensory nerve conduction studies of the ulnar nerves, registered in digits III and IV were performed in search of the ulnar-median communication.