- Discussion:
- motor nerve may cross over from the
median to
ulnar nerve in the forearm;
- 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.
