Hand Intrinsic Muscles Flashcards
Dorsal Interossei
(Origin)
Origin: Adjacent Sides of Two Metacarpal Bones
Dorsal Interossei
(Insertion)
Insertion: Base of Proximal Phalanges, Extensor Expansion of Digits 2-4
Dorsal Interossei
(Action)
Action: Abduct Digits from Axial Line of hand (3rd digit): Flex digits at metacarpophalangeal joint and extend interphalangeal joints
Dorsal Interossei
(Innervation)
Innervation: Ulnar Nerve (Deep Branch)
Dorsal Interossei
(Blood Supply)
Blood Supply: Deep Palmar Arch
Palmar Interossei
(Origin)
Origin: Sides of Metacarpals 2,4,and 5
Palmer Interossei
(Insertion)
Insertion: Bases of proximal phalanx and
extensor expansion of digits 2, 4,
and 5
Palmer Interossei
(Action)
Adducts digits toward axial line of
hand (3rd digit); flexes digits at
metacarpophalngeal joint and
extends interphalangeal joints
Palmer Interossei
(Innervation)
Innervation: Ulnar Nerve (Deep Branch)
Palmer Interossei
(Blood Supply)
Blood Supply: Deep Palmar Arch
Lumbricals
(Origin)
Origin: 1st and 2nd: Lateral two
tendons of flexor
digitorum profundus. 3rd
and 4th: Medial three
tendons of flexor
digitorum profundus
Lumbricals
(Insertion)
Insertion: 1st and 2nd: Lateral sides of
extensor expansion of digits 2
and 3. 3rd and 4th: Lateral sides
of extensor expansion of digits 4
and 5
Lumbricals
(Action)
Action: Extend digits at interphalangeal
joints, flex metacarpophalangeal
joints
Lumbricals
(Innervation)
Innervation: Ulnar Nerve (Deep Branch)
Lumbricals
(Blood Supply)
Blood Supply: Superficial and Deep Palmer Arches