Muscles Of The Hand (2) Flashcards
What is the origin of the opponens pollicis?
Flexor retinaculum
Tubercles of scaphoid and trapezium
What is the attachment of the opponens pollicis?
Lateral side of 1st metacarpal
What is the function of the opponens pollicis?
Oppose thumb
What is the origin of the abductor pollicis brevis?
Flexor retinaculum
Tubercles of scaphoid and trapezium
What is the attachment of the abductor pollicis brevis?
Lateral side of 1st digit at base of distal phalanx
What is the function of the abductor pollicis brevis?
Abducts thumb
Helps oppose thumb
What is the origin of the flexor pollicis brevis?
Flexor retinaculum
Tubercles of scaphoid and trapezium
What is the attachment of the flexor pollicis brevis?
Lateral side of 1st digit at base of distal phalanx
What is the function of the flexor pollicis brevis?
Flexes thumb
What is the origin of the oblique head of the adductor pollicis?
Bases of 2 and 3 metacarpals, capitate, and adjacent carpals
What is the origin of the transverse head of the adductor pollicis?
Anterior surface of 3rd metacarpal shaft
What is the attachment of the adductor pollicis?
Medial side of 1st digit at base of proximal phalanx
What is the function of the adductor pollicis?
Adducts thumb towards lateral border of palm
What is the origin of the abductor digiti minimi?
Pisiform
What is the attachment of the abductor digiti minimi?
Pisiform
What is the function of the abductor digiti minimi?
Abducts 5th digit
What is the origin of the flexor digiti minimi brevis?
Hook of hamate and flexor retinaculum
What is the attachment of the flexor digiti minimi brevis?
Medial side of 5th digit at base of proximal phalanx
What is the function of the flexor digiti minimi brevis?
Flexes proximal phalanx of 5th digit
What is the origin of the opponens digiti minimi?
Hook of hamate and flexor retinaculum
What is the attachment of the opponens digiti minimi?
Medial border of 5th metacarpal
What is the function of the opponens digiti minimi?
Draws 5th metacarpal anterior and rotates it
What is the origin of the 1st and 2nd Lumbricals?
Lateral 2 tendons of flexor digitorum profundus
What is the origin of the 3rd and 4th Lumbricals?
Medial 3 tendons of flexor digitorum profundus
What is the attachment of the Lumbricals?
Lateral side of extensor
Expansions of 2-5 digits
What is the function of the Lumbricals?
Flex MCP joints
Extends IP joints
What is the origin of the dorsal interossei?
Adjacent sides of 2 metacarpals
What is the attachment of the dorsal interossei?
Bases of proximal phalanges
Extensor expansions of 2-4 digits
What is the function of the dorsal interossei?
Abducts 2-4 digits from axial line
Acts with Lumbricals
What is the origin of the palmar interossei?
Palmar surface of 2,4 and 5 metacarpals
What is the attachment of the palmar interossei?
Bases of proximal phalanges
Extensor expansions of 2, 4, and 5 digits
What is the function of the palmar interossei?
Adducts 2, 4, and 5 digits towards axial line
Assists Lumbricals
What will happen to everything distal of compression site?
It will lose function
What are the important compression zones of the median nerve?
Pronator teres
Carpal tunnel
What are the important compression zones of the ulnar nerve?
Cubital tunnel
Guyons canal
What are the important compression zones of the radial nerve?
Triangular interval
Supinator (arcade of froshe)
What is the anterior interosseus nerve a branch of?
Median nerve
What are the branches of the radial nerve?
Deep radial nerve
Posterior interosseus
