Martin Gruber Anastomosis
- motor nerve may cross over from the median to ulnar nerve in the forearm; (motor connections but not sensory connections);
- it occurs in two patterns:
- from median nerve in proximal forearm to ulnar nerve in middle to distal third of forearm, & from AIN to ulnar nerve;
- other anastomoses between median nerve & ulnar nerve includes:
- motor branch of median nerve to superficial head of FPB & ulnar nerve to the deep head of the FPB;
- anastomosis, of median nerve & ulnar motor branches thru first lumbrical or thru innervation of & adductor pollicis;
- branch of median nerve to third lumbrical joining neural branch to this muscle from deep branch of ulnar nerve;
- median nerve may also form anastomoses w/ branch of radial nerve in vicinity of apb & have radial nerve innervate this muscle;
- first dorsal interosseous, adductor pollicis, or even abductor digiti minimi may be innervated by the median nerve
Martin-Gruber anastomosis revisited.
Original Text by Clifford R. Wheeless, III, MD.
Last updated by Data Trace Staff on Thursday, December 15, 2011 3:22 pm