Palmar Interossei
Hand
Remember 'PAD' — Palmar ADduct. They pull your fingers together.
Function
Adduct fingers toward middle finger, flex MCP, extend IP joints
Origin
Metacarpal shafts of digits 2, 4, 5
Insertion
Extensor expansions and bases of proximal phalanges
Innervation
Deep branch of ulnar nerve (C8-T1)