#handmuscles

Hypothenar compartment:

Opponens digiti minimi

Originates on the hook of the hamate and the flexor retinaculum

Inserts on the medial side of the fifth metacarpal

Opposes digit 5.

Flexor digiti minimi brevis

Originates on the hook of the hamate and the flexor retinaculum

Inserts on the medial side of the base of the proximal phalanx of digit 5

Flexes digit 5.

Abductor digiti minimi

Originates on the pisiform (and, in some cases, from the tendon of flexor carpi ulnaris)

Inserts near flexor opponens digiti minimi on the base of the proximal phalanx of digit 5

Abducts digit 5.