Hand

Question 1

carpal bones

Answer 1

-Some Lovers Try Positions That They Cant Handle
-carpals, metacarpals, proximal phalanges, intermediate phalanges (not on thumb), distal phalanges
-scaphoid
-lunate
-triquetrum
-pisiform
-trapzium
-trapezoid
-capitate
-hamate

Question 2

intrinsic muscles of hand: thenar and hypothenar

Answer 2

-originate inside the hand
-thenar, hypothenar, interossei and the lumbrical muscles
-Thenar Muscles: (Median Nerve): fine movements of the thumb (lateral)
-opposition abduction flexion at thumb
All- Abductor Pollicus Brevis
For- Flexor Pollicus Brevis
One- Oppones Pollicus
And- Adductor Pollicus- ULNAR NERVE

-Hypothenar Muscles: (Ulnar Nerve)
-opposition abduction and flexion at pinky
One- Oppones Digiti Minimi
For- Flexor digiti minimi
All- Abductor digiti minimi

Question 3

intrinsic muscles: lumbricals

Answer 3

-4
-attach to flexor digitorum profundus (proximally) and tendons of extensor expansion (distally)
-flexion of metacarpophalangeal joints MCP joint
-extension of interphalangeal joints
-help make L shape
-1st and 2nd- median nerve
-3rd and 4th- ulnar nerve

Question 4

intrinsic muscles: interossei

Answer 4

-2 types
-palmar aspect dorsal aspect
-2 diff functions
-DAB- Dorsal ABduct
-PAD- palmar ADduct
-ULNAR NERVE

Question 5

extrinsic muscles of hand

Answer 5

-extrinsic action at wrist and hand
-extrinsic muscles are under transverse carpal ligament
-flexor digitorum superficialis, profundus, flexor pollicus longus, flexor carpi radialis
-extrinsic muscles of extension- posterior compartment of forearm

Question 6

median nerve innervation

Answer 6

-LOAF
-lumbricals (1st and 2nd)
-oppens pollicus
-abductor pollicus brevis
-felxor pollicus brevis
-everything else is innervated by ulnar

Question 7

median, radial, ulnar nerve deficits in the hand

Answer 7

-cant perform rock position - median nerve injury -> flexor digitorum superficialis, flexor carpi radialis, palmaris longus
-cant perform paper - radial nerve (posterior interosseous nerve) -> extensor carpi radialis longus, extensor carpi radialis brevis
-cant perform scissors (ab and adduct)- ulnar nerve -> dorsal and palmar interossei muscles