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Muscular > hand and wrist > Flashcards

hand and wrist Flashcards

1
Q

hand is subdivided into

A
  • carpus
  • metacarpus
  • digits

abduction and adduction of fingers are defined with respect to long axis of the middle finger

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2
Q
  • how many carpal bones
  • how many metacarpals
  • how many phalanges
A
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3
Q

sacred lovers try positions that they cant handle

A
  • scaphoid
  • lunate
  • triquetrum
  • pisiform
  • trapezium
  • trapezoid
  • capitate
  • hamate
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4
Q

msucles of the hand

thenar muscles

A
  • flexor pollicis brevis
  • opponens pollicis
  • abductor pollicis brevis
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5
Q

muscles of the hand

hypothenar muscles

A
  • flexor digiti minimi brevis
  • opponens digiti minimi
  • abductor digiti minimi
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6
Q

thenar muscles

opponens pollicis

origin, insertion, innervation, function

A
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7
Q

thenar muscles

abductor pollicis brevis

origin, insertion, innervation, function

A
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8
Q

thenar muscles

flexor pollicis brevis

origin, insertion, innervation, function

A
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9
Q

hypothenar muscle

opponens digiti minimi

origin insertion innervation function

A
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10
Q

hypothenar muscles

abductor digiti minimi

origin insertion innervation function

A
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11
Q

hypothenar muscles

flexor digiti minimi brevis

origin insertion innervation function

A
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12
Q

blood supply to the hand is by what two arteries?
what are the arches formed?

A

radial and ulnar arteries
- superficial palmar arch = ulnar artery
- radial artery = deep palmar arch

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13
Q

what pattern do the deep veins follow

A

follow the arteries (deep and superficial venous palmar arches)

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14
Q

what pattern do the superificial veins drain into

A

drain into dorsal venous network on back of hand
- cephalic vein = originates from the lateral side of the dorsal venous network
- basilic vein = originates from medial side of dorsal venous netwrok

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15
Q

ulnar nerve

A

enters hand lateral to pisiform and posteromedially to ulnar
- deep branch (motor) = innervats ALL intrinsic muscles except thenar muscles
- superificial branch (sensory) = innervates dorsal and palmar of 5 & 4 digits

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16
Q

median nerve

A

enters the hand by passing through carpal tunnel
- recurrent branch (motor) innervates thenar muscles and first two lumbricalis muscles
- palmar branch (sensory) innervates the skin on palmar surface of 3 and half digits and dorsal aspects of distal phalanges of same digits

17
Q

radial nerve

A

superficial branch is only part that enters hand
- by passing the anatomical snuff box on dorsolateral side of wrist
- provides senosry innervation over dorsolateral aspect of the palm and dorsal apects of the palm and lateral three digits

18
Q

3 carpal bones at the wrist joint
what are they?

A
  • scaphoid
  • lunate
  • triquetrum
19
Q

carpal tunnel

A

formed anteriorly at the wrist by a deep arch formed by the
- proximal row of carpal bones
- flexor retinaculum (thick connective ligament bridges space between medial and lateral sides of the base of the arch and converts carpal arch into carpal tunnel)

20
Q

carpal tunnel has 9 tendons and one nerve

A
  • median nerve
  • 4 felxor digitorum superficialis
  • 4 flexor digitorum profundus
  • flexor pollicis longus

carpal tunnel has no blood vessels

21
Q

fracture of the scaphoid

A

common fracutre is across the waist of the scaphoid bone
- scaphoid bone has a sole blood supply (radial artery) proximal portion undergoes avascular necrosis

22
Q

De Quervains syndrome

A

inflammatory disorder occurs within first dorsal extensor compartment and involves the extensor pollicis brevis and abductor pollicis longus
- wrist pain preventing flexion/extension and abduction of thumb

23
Q

carpal tunnel syndrome

A

pressure of the median nerve w/in tunnel
- pins and needles sensation
- weakness and loss of muscle bulk of the thenar muscles
- Tinels sign = gently tapping over median to see if pins and needles sensation occurs

24
Q

ulnar nerve injury

A

commonly injuried in elbow and wrist
- elbow = nerve lies posterior to medial epicondyle
- wrist = ulnar nerve passes superifical to flexor retinaculum and lies lateral to pisiform bone
- clawing of the hand
- impaired sensory innervation of palmar aspect of the medial one and one half digits

25
Q

radial nerve injury

A

dropped hand due to deep branch of the radial nerve paralyze muscles of posterior comp
- superificial branch of the radial nerve is little damage only supply small area of skin

Muscular (12 decks)

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