Palmaris brevis muscle
Palmaris brevis muscle |
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origin |
Ulnar aspect of the flexor retinaculum , palmar aponeurosis |
approach |
Skin on the ulnar side of the palm |
function |
Involved in the tension of the palmar aponeurosis |
Innervation |
Ulnar nerve , superficial branch |
Spinal segments |
C8, Th1 |
The musculus palmaris brevis ( Latin for "short palm muscle") is one of the muscles of the hand .
The palmaris brevis muscle is relatively functionless in humans and accordingly extremely small. It is involved in the tensioning of the palmar fascia , but is probably negligible in this function as well. Presumably, this muscle is in developmental decline in humans.
The muscle has a more relevant function in people who do not have a palmaris longus muscle . In this case, the muscle is more developed because it is now likely to be more important for tensioning the palmar fascia.
Palmaris brevis spasm syndrome is a rare disease .