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MSK anatomy > Upper Limb 3 > Flashcards

Upper Limb 3 Flashcards

1
Q

What are the superficial muscles of the forearm?

A

Pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris

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2
Q

What are the actions of the pronator teres?

A

pronates and flexes forearm

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3
Q

What supplies the pronator teres?

A

median nerve

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4
Q

What are the actions of the flexor carpi radialis?

A

flexes and abducts wrist

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5
Q

What supplies the flexor carpi radialis?

A

median nerve

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6
Q

What are the actions of the flexor carpi ulnaris?

A

flexes and adducts wrist

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7
Q

What is the action of the palmaris longus?

A

flexes wrist

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8
Q

What supplies the palmaris longus?

A

median nerve

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9
Q

What supplies the flexor carpi ulnaris?

A

ulnar nerve

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10
Q

What are the actions of the flexor digitorum superficialis?

A

Flexes wrist and MCP & proximal IP joints of middle 4 digits

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11
Q

What are the deep muscles of the forearm?

A

flexor digitorum profundus, flexor pollicus longus and pronator quadratus

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12
Q

What are the actions of the flexor digitorum profundus?

A

flexes wrist and distal IP joints middle 4 digits

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13
Q

What supplies the flexor digitorum profundus?

A

median nerve supplies digits 2&3, ulnar nerve supplies digits 4&5

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14
Q

What is the action of the flexor pollicus longus?

A

flexes thumb (across hand)

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15
Q

What supplies the flexor pollicus longus?

A

median nerve

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16
Q

What is the action of the pronator quadratus?

A

pronates forearm

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17
Q

What supplies the pronator qudratus?

A

median nerve

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18
Q

How does the median nerve lie compared to the brachial artery in the cubital fossa?

A

lies medial to the artery

19
Q

Which muscles of the forearm does the median nerve NOT supply? What supplies these muscles?

A

Does not supply flexor carpi ulnaris and medial half of flexor digitorum profundus- they are supplied by ulnar nerve

20
Q

What are the 2 terminal branches oft the brachial artery? Where does this divide occur?

A

terminal branches are radial and ulnar arteries, this happens at the neck of the radius

21
Q

What is the roof of the carpal tunnel formed by?

A

fibrous retinaculum

22
Q

What are the contents of the carpal tunnel?

A

4 tendons of flexor digitorum superficialis, 4 tendons of flexor digitorum profundus, median nerve and 1 tendon of flexor pollicus longus

23
Q

What causes carpal tunnel syndrome? What are the symptoms?

A

results from a lesion that reduces the size of the carpal tunnel. Leads to tingling, decreased sensation and absence of tactile sensation in area supplied by median nerve

24
Q

What muscle is palmar aponeurosis a continuation of?

A

Palmaris longus

25
Q

What are the thenar muscles? Where are they located?

A

Aductor pollicus brevis, flexor pollicus brevis and opponens pollicis. Located on lateral part of the palm

26
Q

What is the supply to the thenar muscles?

A

Median nerve

27
Q

What are the hypothenar muscles? Where are they located?

A

Abductor digiti minimi, flexor digiti minimi, opponens digiti minimi. Located at medial side of palm.

28
Q

What supplies the hypothenar muscles?

A

Ulnar nerve

29
Q

What is the action of the adductor pollicus?

A

Adducts thumb

30
Q

What is the supply of the adductor pollicus?

A

Ulnar nerve

31
Q

What are the actions of the lumbricals?

A

flex fingers at MCP joints and extend fingers at IP joints of 2nd-5th fingers

32
Q

What are the lumbricals innervated by?

A

Medial 2 lumbriicals supplied by median nerve. Lateral 2 lumbricals supplied by ulnar nerve

33
Q

Where are the interossei located? How many are there?

A

Present between metacarpal bones. 4 dorsal and 3 palmar.

34
Q

What is the action of the dorsal interossei?

A

Abduction of the fingers (DAB)

35
Q

What is the action of the palmar interossei?

A

Adduction of the fingers (PAD)

36
Q

What are the interossei innervated by?

A

ulnar nerve

37
Q

What muscles in the hand does the ulnar nerve NOT supply? What are they supplied by?

A

does not supply the thenar muscles and 1st and 2nd lumbricals. They are supplied by median nerve.

38
Q

What are the 8 carpal bones in the wrist?

A

trapezium, scaphoid, lunate, triquetrum, pisiform, hamate, capitate, trapezoid

39
Q

What type of joint is the wrist joint? What bones articulate?

A

Synovial condyloid joint. Radius articulates with lunate and scaphoid.

40
Q

What movements can occur at the wrist joint?

A

flexion, extension, circumduction, adduction and abduction

41
Q

What are the actions of the extensor carpi radialis?

A

Extension and abduction of the wrist

42
Q

What can be seen on the dorsum of the hand when fingers are abducted?

A

tendons of extensor digitorum

43
Q

What bones can be felt in the anatomical snuff box? What artery lies on the floor of the box?

A

Scaphoid and trapezium can be felt. Radial artery lies on the floor.

MSK anatomy (6 decks)

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