Muscles of hand Flashcards
Origin of Abductor Digiti Minimi
Pisiform
Insertion of Abductor Digiti Minimi
Base of proximal phalanx of 5th digit on it ulnar side
Action of Abductor Digiti Minimi
Abducts 5th digit
Origin of Abductor Pollicis Brevis
Flexor retinaculum
Scaphoid
Trapezium
Insertion of Abductor Pollicis Brevis
Base of proximal phalanx of 1st digit
Action of Abductor Pollicis Brevis
Abducts thumb
Origin of Adductor Pollicis
Oblique head: Capitate & base of 2nd &3rd metacarpals
Transverse Head: shaft of 3rd metacarpal
Insertion of Adductor Pollicis
Base of proximal phalanx of thumb
Action of Adductor Pollicis
Adducts thumb
Origin of Dorsal Interosseous (hand)
4 muscles ; arising from 2 adjacent metacarpal shafts
Insertion of Dorsal Interosseous (hand)
Base of proximal phalanx
Extensor expansion on lateral side of the 2nd digit
Lateral and medial side of 3rd digit
Medial side of 4th digit
Origin of Flexor Digiti Minimi (hand)
Hook of hamate
Flexor Retinaculum
Action of Dorsal interosseous (hand)
Flexes MCP joint
Extends PIP and DIP joints 2-4
Abducts digits 2-4
Insertion of Flexor Digiti Minimi (hand)
Proximal phalanx of 5th digit
Action of Flexor Digiti Minimi (hand)
Flexes carpometacarpo and MCP joints of 5th digit
Origin of Flexor Pollicis Brevis
Flexor retinaculum
Trapezium
Insertion of Flexor Pollicis Brevis
Proximal Phalanx of 1st digit
Action of Flexor Pollicis Brevis
Flexes carpometacarpo and MCP joints of thumb
Origin of Lumbricals (of hand)
Flexor digitorum profundus tendons of digits 2-5
Insertion of Lumbricals (of hand)
Extensor expansion on the radial side of the proximal phalanz of digits 2-5
Actions of Lumbricals (of hand)
Flexes the MCP joints of digits 2-5
Extends the PIP & DIP joints of digits 2-5
Origin of Opponens Digiti Minimi
Hook of hamate
Flexor retinaculum
Insertion of Opponens Digiti Minimi
Shaft of 5th metacarpal
Action of Opponens Digiti Mimini
Opposes 5th digit
Origin of Opponens Pollicis
Flexor retinaculum
Trapezium
Insertion of Opponens Pollicis
Shaft of 1st metacarpal
Action of Opponens Pollicis
Opposes thumb
Origin of Palmar Interosseous
4 muscles ; arising from palmar surface of the shafts of the metacarpals 1,2,4&5
Insertion of Palmar Interosseous
Base of proximal phalanx
Extensor expansion of medial side of digits 1&2 and lateral side of digits 4&5
Action of Palmar Interosseous
Flexes the MCP joints of digits 1,2,4&5
Extends PIP&DIP joints of digits 1,2,4&5
Adducts digits 1,2,4,&5
Origin of Palmaris Brevis
Fascia overlying the hypothenar eminance
Insertion of Palmaris Brevis
Skin of the palm near the ulnar border of the hand
Action of Palmaris Brevis
Draws the skin of the ulnar side of hand toward center of palm
