Intrinsic Muscles Of Hand Flashcards
Insertion of Opponens Pollicis
Lateral side of 1st metacarpal
Opponens Pollicis Origin
Flexor retinaculum and tubercle of scaphoid and trapezium
Innervation of Opponens Pollicis
Recurrent branch of median nerve C8 T1
Action of Opponens Pollicis
To oppose thumb
draws 1st metacarpal medially to center of palm and rotates it medially
Abductor pollicis Breves origin
Flexor retinaculum
tubercles scaphoid and trapezius
Abductor pollicis breves insertion
Lateral side of base of proximal phalanx of thumb
Innervation of Abductor Pollicis breves
Recurrent branch of median nerve C8 T1
Action of Abductor Pollicis Breves
Abducts thumb: helps oppose it
Flexor Pollicis Breves: superficial and deep head Origin
Flexor Retiniculum
tubercles of scaphoid and trapezium
Insertion of Flexor Pollicis Breves: Superficial head and deep head
Lateral side of proximal base of phalnax of thumb
Innervation of Flexor Pollicis Breves: superficial and Deep head
Recurrent branch of median nerve C8 T1
Action of Flexor Pollicis Breves: superficial head and Deep head
Flexes thumb
Adductor Policis: Oblique and Transverse Head
Origin
Oblique Head: Base of 2nd and 3rd metacarpals, Capitate, Adjacent carpals
Transverse Head: Anterior surface Of 3rd Metacarpals
Insertion of Adductor Pollicis: Oblique and Transverse Heads
Medial side of base of proximal phalanx of thumb
Innervation of Aducctor Pollicis: oblique and transverse heads
Deep branch of ulnar nerve C8 T1
Action of Adductor Pollicis: Oblique and Transverse Heads
Adducts thumb toward lateral border of palm
Abductor Digiti Minimi Origin
Pisiform
Abductor digiti minimi Insertion
Medial side of base of proximal phalanx of 5th finger
Innervation of abductor digiti minimi
Deep branch of ulnar nerve C8 T1
Action of Abductor Digiti Minimi
abducts 5th finger
assists in flexion of its proximal phalanx
Flexor Digiti Minimi Breves Origin
Hook of hamate and flexor retinaculum
Insertion of Flexor Digiti Minimi
Medial side of base of proximal phalanx of 5th finger
Innervation of Flexor Digiti minimi
Deep branch of ulnar C8 T1
Action of flexor Digiti Minimi
Flexes proximal phalanx of 5th finger
Opponens of digiti Minimi Origin
Hook of hamate
flexor retinaculum
Insertion of opponens digiti minimi
Medial border of 5th metacarpal
Innervation of Opponens Digiti minimi
Deep branch of ulnar nerve C8 T 1
Action of Opponen digiti Minimi
Opposes 5th metacarpal anterior and
rotates it
bringing 5th finger into opposition with thumb
Lumbrical origin
1 and 2
3 and 4
1 and 2 Origin lateral two tendons of flexor digitorum profundus
3 and origin medial 3 tendons of flexor digitorum profundus
Lumbrical Insertion
1 and 2
3 and 4
Both insert lateral side of extensor expansions of 2nd-5th fingers
Innervation of Lumbricals
1 and 2
3 and 4
1 and 2 : median nerve C8 T1
3 and 4; deep branch of ulna C8 T1
Action of lumbrical
1 and 2
3 and 4
(karate hand)
Flexes metacarpophalangeal joint and
extends interphalangeal joints 2-5 fingers
Dorsal Interossei, 1-4 Origin
adjacent side of 2 metacarpals
Dorsal interossie 1-4 Insertion (bipennate muscle)
Base of proximal phalnages,
extensor expansion 2nd-4th finger
Innervation of Dorsal Interossei 1-4
deep branch of ulna nerve C8 T1
Action of Dorsal Interoseii 1-4
Abduct 2-4th finger from axial line
act with lumbricals in flexing metacapophalangeal and extending interphalangeal joint
Origin Palmar Interossei 1-3
palmar surface of 2nd, 4th, 5th metacarpals
Insertion of Palmar Interossei 1-3 (unipennate muscle)
base of proximal base of phalanges
extensor expansion of 2nd, 4th, 5th finger
Palmar Interossei 1-3 innervation
Deep branch of ulnar nerve C8 T1
Action of Palmar Interossei 1-3
Adduct 2nd,4th,5th fingers towards axial line
assist Lumbricals in flexing metacarpophalanges and extends interphalangeal joints
