Hand Flashcards
How many bones form the wrist?
8 carpal bones
Describe the proximal row of wrist bones.
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Scaphoid
Lunate
Triquetrum
Pisiform
Describe the distal row of wrist bones.
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Hamate
Capitate
Trapeziod
Trapezium (under the thumb)
Name the muscles in the thenar eminence. (4)
Adductor pollicis
Abductor pollicis brevis
Flexor pollicus brevis
Opponens pollicis
What 2 muscles allow the thumb and little finger to pinch?
Opponens pollicis (thumb) Opponens digiti minimi (pinky)
Name the muscles in the hypothenar eminence. (3)
Abductor digiti minimi
Flexor digiti minimi
Opponens digiti minimi
How many dorsal interossei are there?
4; one in each web space on the back of the hand
What do the dorsal interossei do?
Abduct [DAB] fingers away from the middle finger
How many palmar interossei are there?
3; on the palm of the hand
What do the palmar interossei do?
Adduct [PAD] fingers towards the middle finger
What hand muscles does the median nerve supply? (5)
LLOAF Lumbrical to the middle finger Lumbrical to the index finger Opponens pollicis Abductor pollicis brevis Flexor pollicis brevis
Describe the cutaneous innervation of the hand.
Median nerve - supplies 3 1/2 digits of the palm and their nail beds.
Ulnar nerve - supplies medial 1 1/2 digits of the hand.
Radial nerve - supplies the lateral 2/3 of the dorsum of the hand
What are metacarpals?
Lie between the carpals and the phalanges. Thumb (1) Index (2) Middle (3) Ring (4) Little (5)
What are the phalanges?
Insert onto the meta carpals.
Proximal phalanges
Middle phalanges
Distal phalanges
What runs in the carpal tunnel? (4)
Flexor pollicis longus
Four tendons of flexor digitorum superficialis
Four tendons of flexor digitorum profundus
Median nerve
