the hand and wrist Flashcards
describe the articulation of wrist?
distal end of radius and articular disc of distal radio-ulnar joint articulate with proximal row of carpal bones (except pisiform)
name the bones in the carpus
some lovers try positions that they cant handle
scaphoid lunate triquetrum pisiform trapezium trapezoid capitate hamate
what makes the carpal tunnel?
carpal bones (posteriorly) and flexor retinaculum (anteriorly)
what nerve is compressed in carpal tunnel syndrome?
median nerve
why is the palmar cutaneous branch of median nerve not affected in carpal tunnel syndrome?
because it branches off proximal to the tunnel and travels superficially to reach skin of palm
name 2 tests you can do for carpal tunnel syndrome?
Tinel’s test
Phalen’s test
name the joints in the hand?
carpometatarsal
metacarpophalangeal
prox and dist interphalangeal
what are the fatty pad bits on the hand called?
`thenar and hypothenar eminence
what is dupuytren’s contracture?
progressive, shortening, thickening and fibrosis of palmar fascia
name the 3 nerves which innervate the hand (sensory)?
radial nerve
ulnar nerve
median nerve
on the palmar aspect of the hand, what nerve innervates the skin over the base of thumb?
radial nerve
on the palmar aspect of the hand, what nerve innervates the central/lateral palm, half of the ring finger, the thumb, index and middle finger?
median nerve
on the palmar aspect of the hand, what nerve innervates the medial part of palm, the little finger and the medial half of ring finger?
ulnar nerve
on the dorsal aspect of the palm, what nerve innervates the skin over anatomical snuff box, lateral dorsum of hand and prox index and middle fingers?
radial nerve
on the dorsal aspect of the palm, what nerve innervates the skin over distal phalanges and nail beds of the thumb, index, middle finger?
median nerve
on the dorsal aspect of the palm, what nerve innervates the medial dorsum of hand, teh little finger and medial half of ring finger?
ulnar nerve
which nerve enters the thenar muscles?
recurrent branch of median nerve
what are the 4 groups of intrinsic hand muscles?
thenar
hypothenar
lumbricals
interossei
what nerve supplies the first and second lumbricals?
median nerve
what nerve supplies the 3rd and 4th lumbricals?
deep branch of ulnar
what nerve supplies the 1st-4th dorsal interossei an dthe 1st-3rd palmar interossei?
deep branch of ulnar nerve
which nerve supplies the hypothenar muscles?
deep branch of ulnar nerve
where would you find palmaris brevis muscle?
in hypothenar subcutaneous tissue
it aids palmar grip by wrinkling skin to deepen hollow in plam
name the thenar muscles supplied by the recurrent branch of median nerve?
opponens pollicus
abductor pollicus brevis
flexor pollicus brevis
superficial head
name the thenar muscles supplied by the deep branch of ulnar nerve?
deep head
adductor pollicus
oblique head
transverse head
name the hypothenar muscles?
abductor digiti minimi
flexor digiti minimi brevis
opponens digiti
what 2 main arteries supply the hand?
radial and ulnar
what makes the superficial palmar arch?
superficial branches of radial and ulnar arteries
what makes the deep palmar arch?
the deep branches of radial and ulnar arteries
name the arteries which supply the fingers?
proper digital arteries
explain the venous drainage of the hand?
dorsal digital veins drain to 3 metacarple veins which unite to form venous plexus and then join cephalic vein
the basilic vein arises from the medial side of dorsal venous network
where does the lymph in the hands drain to?
cubital and axillary nodes
