Lumbricals muscle
Origin of Lumbricals
Palmar 1 - 3: Palmar surfaces of 2nd, 4th and 5th metacarpals (unipennate muscles)
Insertion of Lumbricals
Palmar 1 - 3: Extensor expansions of digits and bases of proximal phalanges of digits 2, 4 and 5
Muscle Function of Lumbricals
Palmar 1 - 3: Adduct digits toward axial line and assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints
Arterial (Blood) Supply of Lumbricals
Palmar 1 - 3: Palmar metacarpal arteries
Lumbricals Video
Lumbrical muscles of the Hand