Name
Pronunciation
(ab-DUK-tor DIJ-I-ti MIN-I-mi)
Origin/Proximal Attachment
Pisiform & tendon of flexor carpi ulnaris
Insertion/Distal Attachment
Medial aspect of base of proximal phalanx of 5th digit
May send slip to ulnar side of dorsal expansion
Action/Relevance
Abducts 5th digit (requires pisiform stabilized by FCU)
Assists to flex 5th digit (at MCP)
May assist in extension of 5th digit (at IP due to slips to extensor digitorum)
Innervation
Ulnar nerve - deep branch (C8, T1)
Notes
Muscle for abduction of the fifth finger. Origin: pisiform and tendon of flexor carpi ulnaris tendon. Insertion: ulnar aspect of the base of the proximal phalanx of the fifth finger.