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6. MSK > Upper Limb Muscles of the Forearm > Flashcards

Upper Limb Muscles of the Forearm Flashcards

1
Q

What are the two main compartments of the forearm?

A

Anterior and posterior compartments.

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2
Q

What are the layers of the anterior forearm and the muscles in them?

A

Superficial layer - pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris.
Intermediate layer - flexor digitorum superficialis.
Deep layer - flexor digitorum profundus, flexor pollicis longus, pronator quadratus.

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3
Q

What are the proximal attachments of the pronator teres?

A

Ulnar head - coronoid process.

Humeral head - medial epicondyle of humerus.

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4
Q

What is the distal attachment of the pronator teres?

A

Middle of convexity of lateral surface of radius.

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5
Q

What is the pronator teres innervated by?

A

Median nerve (C6, C7).

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6
Q

What is the arterial supply of the pronator teres?

A

Ulnar artery and the anterior ulnar recurrent artery.

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7
Q

What is the action of the pronator teres?

A

Pronates and flexes forearm at the elbow.

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8
Q

What is the proximal attachment of the flexor carpi radialis?

A

Medial epicondyle of the humerus.

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9
Q

What is the distal attachment of the flexor carpi radialis?

A

Base of 2nd metacarpal.

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10
Q

What is the flexor carpi radialis innervated by?

A

Median nerve (C6, C7).

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11
Q

What is the arterial supply of the flexor carpi radialis?

A

Ulnar artery.

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12
Q

What is the action of the flexor carpi radialis?

A

Flexes and abducts hand at wrist.

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13
Q

What is the proximal attachment of the palmaris longus?

A

Medial epicondyle of humerus.

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14
Q

What are the distal attachments of the palmaris longus?

A

Distal half of flexor retinaculum and apex of palma aponeurosis.

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15
Q

What is the palmaris longus innervated by?

A

Median nerve (C7, C8).

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16
Q

What is the arterial supply of the palmaris longus?

A

Ulnar artery.

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17
Q

What is the action of the palmaris longus?

A

Flexes hand at the wrist and tenses palmar aponeurosis.

18
Q

What are the proximal attachments of the flexor carpi ulnaris?

A

Humeral head - medial epicondyle of humerus.

Ulnar head - olecranon and posterior border of ulna.

19
Q

What are the distal attachments of the flexor carpi ulnaris?

A

Pisiform, hook of hamate and 5th metacarpal.

20
Q

What is the flexor carpi ulnaris innervated by?

A

Ulnar nerve (C7, C8).

21
Q

What is the arterial supply of flexor carpi ulnaris?

A

Ulnar artery.

22
Q

What is the action of flexor carpi ulnaris?

A

Flexes and adducts hand at wrist.

23
Q

What are the proximal attachments of the flexor digitorum superficialis?

A

Humeruo-ulnar head - medial epicondyle.

Radial head - superior half of anterior border.

24
Q

What are the distal attachments of the flexor digitorum superficialis?

A

Shafts of middle phalanges of medial four digits.

25
Q

What is the flexor digitorum superficailis innervated by?

A

Median nerve (C7, C8, T1).

26
Q

What is the arterial supply of flexor digitorum superficialis?

A

Ulnar artery.

27
Q

What is the action of the flexor digitorum superficialis?

A

Flexes middle phalanges at proximal interphalangeal joints of middle four digits, acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints.

28
Q

What are the proximal attachments of the flexor digitorum profundus?

A

Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane.

29
Q

What are the distal attachments of the flexor digitorum profundus?

A

Medial part - bases of distal phalanges of 4th and 5th digits.
Lateral part - bases of distal phalanges of 2nd and 3rd digits.

30
Q

What is the flexor digitorum profundus innervated by?

A

Medial part - ulnar nerve (C8, T1).

Lateral part - anterior interosseous nerve, from median nerve (C8, T1).

31
Q

What is the arterial supply to the flexor digitorum profundus?

A

Ulnar artery and the anterior interosseous artery.

32
Q

What is the action of the flexor digitorum profundus?

A

Medial part - flexes distal phalanges 4 and 5 at distal interphalangeal joints.
Lateral part - flexes digital phalanges 2 and 3 at distal interphalangeal joints.

33
Q

What are the proximal attachments of the flexor pollicis longus?

A

Anterior surface of radius and adjacent interosseous membrane.

34
Q

What is the distal attachment of the flexor pollicis longus?

A

Base of the distal pahlanx of thumb.

35
Q

What is the flexor pollicis longus innervated by?

A

Anterior interosseous nerve, from median nerve (C8, T1).

36
Q

What is the arterial supply to the flexor pollicis longus?

A

Anterior interosseous artery.

37
Q

What is the action of the flexor pollicis longus?

A

Flexes phalanges of 1st digit.

38
Q

What is the proximal attachment of the pronator quadratus?

A

Distal quarter of anterior surface of ulna.

39
Q

What is the distal attachment of the pronator quadratus?

A

Distal quarter of anterior surface of radius.

40
Q

What is the pronator quadratus innervated by?

A

Anterior interosseous nerve, from median nerve (C8, T1).

41
Q

What is the arterial supply to the pronator quadratus?

A

Anterior interosseous artery.

42
Q

What is the action of the pronator quadratus?

A

Pronates forearm, deep fibres bind radius and ulna together.

6. MSK (30 decks)

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