Exam 1 - Wrist and Hand Flashcards
What are the Proximal row Carpal bones?
Scaphoid, Lunate, Triquetrum, Pisiform
Some Lovers Try Positions That They Can’t Handle
What are the Distal row Carpal bones?
Trapezium, Trapezoid, Capitate, Hamate
Some Lovers Try Positions That They Can’t Handle
TrapeziUM is by the thUMB, TrapeziOID is inSIDE.
What are the bones of the fingers and thumb?
Metacarpal and 3 phalanges for the fingers and 2 phalanges for the thumb
What are the Thenar muscles?
Abductor Pollicis Brevis, Flexor Pollicis Brevis, Adductor Pollicis, Opponens Pollicis
Brevis - Abduct, Flex No Brevis - Oppose, Adduct
Abduct, Flex, Oppose, Adduct
What are the Hypothenar muscles?
Abductor digiti minimi, Flexor digiti minimi brevis, Opponens digiti minimi
Brevis - Flex. No Brevis - Abduct, Oppose
Flex, Oppose, Abduct - Digiti Minimi
What are the muscles of the hand besides the Thenar and Hypothenar muscles?
Lumbricals, Dorsal interossei, Palmar interossei
What are the origins of abductor pollicis brevis?
flexor retinaculum, scaphoid, trapezium
What are the insertions of abductor pollicis brevis?
base of the proximal phalanx of the first digit
What are the functions of abductor pollicis brevis?
abducts thumb
What innervates the abductor pollicis brevis?
recurrent branch of median nerve
What supplies blood to abductor pollicis brevis?
superficial palmar br. of the radial a.
What are the origins of Flexor pollicis brevis?
flexor retinaculum, trapezium
What are the insertions of Flexor pollicis brevis?
proximal phalanx of the 1st digit
What are the functions of Flexor pollicis brevis?
flexes the carpometacarpal and metacarpophalangeal joints of the thumb
What innervates the Flexor pollicis brevis?
recurrent branch of the median nerve
What supplies blood to the Flexor pollicis brevis?
superficial palmar br. of the radial a.
What are the origins of Adductor pollicis?
oblique head: capitate and base of the 2nd and 3rd metacarpals; transverse head: shaft of the 3rd metacarpal
What are the insertions of Adductor pollicis?
base of the proximal phalanx of the thumb
What are the functions of Adductor pollicis?
Adducts the thumb
What innervates the Adductor pollicis?
ulnar nerve, deep branch
What supplies blood to the Adductor pollicis?
deep palmar arterial arch
What are the origins of Abductor digiti minimi?
pisiform
What are the insertions of Abductor digiti minimi?
base of the proximal phalanx of the 5th digit on its ulnar side
What are the functions of Abductor digiti minimi?
abducts the 5th digit
What innervates the Abductor digiti minimi?
deep branch of the ulnar nerve
What supplies blood to the Abductor digiti minimi?
ulnar artery
What are the origins of Flexor digiti minimi brevis?
hook of hamate & the flexor retinaculum
What are the insertions of Flexor digiti minimi brevis?
proximal phalanx of the 5th digit
What are the functions of Flexor digiti minimi brevis?
flexes the carpometacarpal and metacarpophalangeal joints of the 5th digit
What innervates the Flexor digiti minimi brevis?
ulnar nerve, deep branch
What supplies blood to the Flexor digiti minimi brevis?
ulnar artery
What are the origins of Opponens digiti minimi?
hook of hamate and flexor retinaculum
What are the insertions of Opponens digiti minimi?
shaft of 5th metacarpal
What are the functions of Opponens digiti minimi?
opposes the 5th digit
What innervates the Opponens digiti minimi?
Ulnar nerve, deep branch
What supplies blood to the Opponens digiti minimi?
ulnar artery
What are the origins of the Lumbricals?
flexor digitorum profundus tendons of digits 2-5
What are the insertions of the Lumbricals?
extensor expansion on the radial side of the proximal phalanx of digits 2-5
What are the functions of the Lumbricals?
flex the metacarpophalangeal joints, extend the proximal and distal interphalangeal joints of digits 2-5
What innervates the Lumbricals?
median nerve (radial 2) via palmar digital nerves & ulnar nerve (ulnar 2) via deep branch
What supplies blood to the Lumbricals?
superficial palmar arterial arch
What are the origins of the Dorsal interossei?
four muscles, each arising from two adjacent metacarpal shafts
What are the insertions of the Dorsal Interossei?
base of the proximal phalanx and the extensor expansion on lateral side of the 2nd digit, lateral & medial sides of the 3rd digit, and medial side of the 4th digit
What are the functions of the Dorsal Interossei?
flex the metacarpophalangeal joint, extend the proximal and distal interphalangeal joints of digits 2-4, abduct digits 2-4 (abduction of digits in the hand is defined as movement away from the midline of the 3rd digit)
What innervates the Dorsal Interossei?
ulnar nerve, deep branch
What supplies blood to the Dorsal Interossei?
dorsal and palmar metacarpal aa.
What are the origins of the Palmar Interossei?
four muscles, arising from the palmar surface of the shafts of metacarpals 1, 2, 4, & 5 (the 1st palmar interosseous is often fused with the adductor pollicis m.)
What are the insertions of the Palmar interossei?
base of the proximal phalanx and extensor expansion of the medial side of digits 1 & 2, and lateral side of digits 4 & 5
What are the functions of the Palmar Interossei?
flexes the metacarpophalangeal, extends proximal and distal interphalangeal joints and adducts digits 1, 2, 4, & 5 (adduction of the digits of the hand is in reference to the midline of the 3rd digit)
What innervates the Palmar Interossei?
ulnar nerve, deep branch
What supplies blood to the Palmar Interossei?
Superficial is Ulnar artery and Deep is Radial artery
