The Hand Flashcards
how many categories of bones in the hand are there, and what are they?
3 categories =
- 8 carpal in the wrist area
- 5 metacarpals for each digit
- bones of the phalanges (each has 3 but thumb has 2)
Name the 8 carpal bones (lateral to medial)
She Looks Too Pretty
Try To Catch Her
Proximal row =
1) scaphoid 5) Trapezium
2) Lunate 6) Trapeziod
3) Triquetrum 7) capitate
4) Pisiform 8) Hamate
what are the 2 categories of muscle in the hand?
Extrinsic - located in compartments of forearm. control crude movements
Intrinsic - located in the hand itself. control fine motor movements
what are the 4 intrinsic muscles of the hand?
Thenar, hypothena, lumbricals, interossei
what nerve innervates the thenar muscles?
Median nerve
what are the 2 elevations in the palm and where are they?
thenar - under the thumb
hypothenar - under the pinky
what are the 3 thenar muscles? (thumb)
1) opponens pollicis
2) abductor pollicis brevis
3) Flexor pollicis brevis
what are the 4 hyopothenar muscles? (pinky)
1) abductor digitoi minimi
2) flexor digiti minimi
3) oppones digiti minimi
4) palmaris brevis
how many lumbricals are there and what do they do?
4 - one for each finger
Connects extensor tendons to flexor tendons
how many palmar interossei are there?
3
how many dorsal interossei are there?
4
what are 4 extrinsic muscles of the hand?
1) flexor digitorum superficialis
2) flexor digitorum profundus
3) flexor pollicis longus
4) palmaris longus
how is ape hand caused?
wasting away of the thenar muscle
how is claw hand caused?
ulna nerve palsy
which carpal fractures more commonly?
scaphoid
