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Functional Musculoskeletal Anatomy A > Week 9: Muscles of the Hand and Hand Function > Flashcards

Week 9: Muscles of the Hand and Hand Function Flashcards

1
Q

What is the common origin for the superficial muscles of the anterior forearm?

A

medial epicondyle of humerus

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2
Q

What are the superficial muscles of the anterior forearm?

A

pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris, flexor digitorum superficialis

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3
Q

What is the distal attachment does pronator teres have?

A

ulnar tuberosity

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4
Q

What is the distal attachment of FCR?

A

base of the 2nd and 3rd MC

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5
Q

What is the distal attachment of palmaris longus?

A

palmar fascia

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6
Q

What is the distal attachment of FCU?

A

pisiform and base of 5th MC

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7
Q

What is the distal attachment of FDS?

A

middle phalanges (2-5)

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8
Q

What are the deep muscles of the anterior forearm?

A

flexor digitorum profundus, flexor pollicus longus, pronator quadratus

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9
Q

What are the attachments of FDP?

A

ulna and interosseous membrane to distal phalanges (2-5)

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10
Q

What are the attachments of FPL?

A

radius and interosseous membrane to distal phalanx 1

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11
Q

What are the attachments of pronator quadratus?

A

anterior surface of ulna to anterior surface of radius

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12
Q

What are the superficial muscles of the posterior forearm?

A

extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris

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13
Q

What is the common origin of the superficial muscles of the posterior forearm?

A

lateral epicondyle

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14
Q

What is the distal attachment of ECRL?

A

2nd MC

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15
Q

What is the distal attachment of ECRB?

A

3rd MC

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16
Q

What is the distal attachment of ED?

A

extensor expansions of digits 2-5

17
Q

What is the distal attachment of EDM?

A

extensor expansion of digit 5

18
Q

What is the distal attachment of ECU?

A

5th MC

19
Q

What are the deep muscles of the posterior forearm?

A

Abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, extensor indicis

20
Q

What are the attachments of abductor pollicis longus?

A

posterior surface of proximal half of radius, ulna and interosseous membrane to 1st MC

21
Q

What are the attachments of extensor pollicis brevis?

A

posterior surface of distal third of radius and interosseous membrane to proximal phalanx of thumb

22
Q

What are the attachments of extensor pollicis longus?

A

posterior surface of middle third of ulna and interosseous membrane to distal phalanx of thumb

23
Q

What are the attachments of extensor indicis?

A

posterior surface of distal third of ulna and interosseous membrane to extensor expansion of index finger

24
Q

What are the muscles in the thenar eminence?

A

opponens pollicis, abductor pollicis brevis, flexor pollicis brevis

25
Q

What are the muscles in the hypothenar eminence?

A

opponens digiti minimi, abductor digiti minimi, flexor digiti minimi

26
Q

What are the attachments of abductor digiti minimi?

A

pisiform bone and flexor retinaculum to proximal phalanx of 5th digit

27
Q

What are the attachments of abductor pollicis brevis?

A

scaphoid, trapezium and flexor retinaculum to proximal phalax of thumb

28
Q

What are the attachments of flexor digiti minimi?

A

hamate to proximal phalanx of 5th digit

29
Q

What are the attachments of flexor pollicis brevis?

A

trapezium and flexor retinaculum to proximal phalanx of thumb

30
Q

What are the attachments of opponens digiti minimi?

A

hamate and flexor retinaculum to 5th MC

31
Q

What are the attachments of opponens pollicis?

A

trapezium and flexor retinaculum to 1st MC

32
Q

What are the attachments of adductor pollicis?

A

oblique head= capitate, palmar bases of 2nd and 3rd MC to medial base of proximal phalanx of thumb
transverse head= palmar base of 3rd MC to medial base of proximal phalanx of thumb

33
Q

What are the attachments of the lumbricals?

A

FDP tendons to lateral side of extensor expansions of digits 2-5

34
Q

What are the attachments of the palmar interossei?

A

digit 2= ulnar side of 2nd MC to ulnar base of proximal phalanx
digit 4 and 5= radial side of MC to radial base of proximal phalanx

35
Q

What are the attachments of the dorsal interossei?

A

digits 3 and 4= ulnar side to extensor expansion

digits 2 and 3= radial side to extensor expansion

36
Q

What are the functions of sheaths?

A

facilitate smooth gliding of tendons, create a mechanical advantage, maintains tendon health via synovial fluid supply

37
Q

What are the functions of the palmar aponeurosis?

A

strengthens the hand for gripping, protect underlying vessels and nerves, vertical septa fibres form compartments

38
Q

What is the role of the wrist joint complex in a power grip?

A

provide a stable base to grip, move through range to control the tool/object

39
Q

What is the tole of the wrist joint in a precision grip?

A

provide a stable base, optimize length tension relationship for longer finger muscles

Functional Musculoskeletal Anatomy A (12 decks)

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