Everyday Muscle.

Palmaris Brevis

Hand
Wrinkles the skin of the hypothenar eminence to improve grip — the only intrinsic hand muscle innervated by the superficial branch of the ulnar nerve.
Function
Wrinkles hypothenar skin; protects ulnar neurovascular bundle
Origin
Palmar aponeurosis and flexor retinaculum
Insertion
Skin of medial palm
Innervation
Superficial branch of ulnar nerve (C8-T1)
Learn this region Quiz this region
Flexor Digitorum Profundus Extensor Digitorum Extensor Indicis Flexor Pollicis Longus Extensor Pollicis Longus Extensor Pollicis Brevis Abductor Pollicis Longus Adductor Pollicis Opponens Pollicis Opponens Digiti Minimi (Hand)