Origin
It arises from the palmar aponeurosis and the flexor retinaculum.
Insertion
Palmaris brevis is inserted into the skin of the palm and sometimes into the pisiform bone.
Blood supply
Palmar metacarpal artery.
Nerve supply
Superficial branch of the ulnar nerve.
Action
This muscle helps in gripping objects. It is also responsible for formation of creases on the palm.
Disease/Injury
Palmaris brevis spasm syndrome is a relatively rare occurrence. The causes are nerve injury, post-surgical, spontaneous, or even familial.
Interesting facts
The palmaris brevis, amongst other muscles, helps to deepen the hollow of the palm.
