Frequency of Electrodiagnostically Measurable Berrettini Anastomosis

Conclusions:
The Berrettini anastomosis can frequently be seen as a small amplitude sensory nerve action potential response, but at times can be observed with an amplitude greater than 10 μV. It is possible that patients with an absent or significantly delayed median nerve response may have simultaneous inadvertent spread of stimulus to ulnar axons measurable on D3 that may be interpreted as a falsely normal response. All electromyographers need to be aware of this potential pitfall.

Source: Journal of Clinical Neurophysiology - May 1, 2020 Category: Neurology Tags: Original Research Source Type: research