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Musculoskeletal Anatomy > Anterior Forearm > Flashcards

Anterior Forearm Flashcards

1
Q

Deep fascia

A

Dense connective tissue
Blends with periosteum
Deep to superficial fascia

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2
Q

Investing fascia

A

Extension of deep fascia surrounding individual muscles

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3
Q

Inermuscular fascia

A

Connects deep fascia to bones
Divides limb into fascial compartments

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4
Q

Anterior compartment

A

Compartment that contains flexor and pronator muscles
Innervated by anterior divisions of the brachial plexus

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5
Q

Posterior compartment

A

Compartment that contains extensor and supinator muscles
Innervated by posterior divisions of the brachial plexus

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6
Q

Interosseous membrane

A

Forms syndesmosis between the radius and ulna
Divides the forearm into anterior and posterior compartments

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7
Q

Palmar aponeurosis

A

Thickened central portion of the palmar fascia

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8
Q

Retinacula

A

Thickenings of deep fascia
Holds tendons close to bones to prevent ‘bowstringing’ during flexion and extension

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9
Q

Flexor retinaculum

A

Forms roof of carpal tunnel
Medial nerve passes deep to here with tendons of digital flexors

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10
Q

Extensor retinaculum

A

Connected to radius and ulna
Forms tunnels for tendons and synovial sheaths of posterior forearm muscles

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11
Q

Finger retinacula

A

Made from anular and cruciform ligaments to prevent bowstringing of flexor tendons in the fingers

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12
Q

Innervation of the anterior compartment of the arm

A

Musculocutaneous muscle

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13
Q

Blood supply to anterior compartment of arm

A

Brachial artery

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14
Q

Origin of biceps brachii

A

Long head- supraglenoid tubercle, glenoid labrum
Short head- coracoid process

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15
Q

Insertion of biceps brachii

A

Radial tuberosity

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16
Q

Action of biceps brachii

A

Supination, elbow flexion, shoulder flexion

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17
Q

Bicipital aponeurosis

A

Blends with deep antebrachial fossa
Protects deep structures in cubital fossa

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18
Q

Origin of brachialis

A

Anterior humerus

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19
Q

Insertion of brachialis

A

Coronoid process and ulnar tuberosity

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20
Q

Action of brachialis

A

Elbow flexion

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21
Q

Origin of coracobrachialis

A

Coracoid process

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22
Q

Insertion of coracobrachialis

A

Medial humerus

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23
Q

Action of coracobrachialis

A

Assist in flexion and adduction of shoulder.
Resist dislocation

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24
Q

Superior border of cubital fossa

A

Line between medial and lateral epicondyles

25
Q

Lateral border of cubital fossa

A

Brachioradialis and extensor muscle mass

26
Q

Medial border of cubital fossa

A

Pronator teres and flexor muscle mass

27
Q

Roof of cubital fossa

A

Deep brachial and antebrachial fascia

28
Q

Origin of pronator teres

A

Humeral head: medial epicondyle
Ulnar head: coronoid process

29
Q

Insertion of pronator teres

A

Lateral radius

30
Q

Innervation of pronator teres

A

Medial nerve

31
Q

Action of pronator teres

32
Q

Origin of flexor carpi radialis

A

Medial epicondyle

33
Q

Insertion of flexor carpi radialis

A

Base of second metacarpal

34
Q

Innervation of flexor carpi radialis

A

Median nerve

35
Q

Action of flexor carpi radialis

A

Flexion and abduction of wrist

36
Q

Origin of palmaris longus

A

Medial epicondyle

37
Q

Insertion of palmaris longus

A

Palmar aponeurosis and flexor retinaculum

38
Q

Innervation of palmar longus

A

Median nerve

39
Q

Action of palmaris longus

A

Tension of palmar aponeurosis, weak wrist flexion

40
Q

Origin of flexor digitorum superficialis

A

Humero-ulnar head: medial epicondyle and coronoid process
Radial head: anterior radius

41
Q

Insertion of flexor digitorum superficialis

A

Intermediate phalanges 2-5

42
Q

Innervation of flexor digitorum superficialis

A

Median nerve

43
Q

Action of flexor digitorum superficialis

A

PIP joint flexion and MCP of 2-5

44
Q

Dorsal boundary of carpal tunnel

A

Trapezoid, capitate, hamate, triquetrum

45
Q

Medial boundary of carpal tunnel

A

Hook of hamate, pisiform

46
Q

Lateral boundary of carpal tunnel

A

Tubercle of trapezium, scaphoid

47
Q

Palmar boundary of carpal tunnel

A

Flexor retinaculum

48
Q

Origin of flexor digitorum profundus

A

Ulnar shaft, interosseous membrane

49
Q

Insertion of flexor digitorum profundus

A

Distal phalanges of digits 2-5

50
Q

Innervation of flexor digitorum profundus

A

Lateral half: anterior interosseous (from median nerve)
Medial half: ulnar nerve

51
Q

Action of flexor digitorum produnfus

A

Flexion of DIP joints of digits 2-5

52
Q

Origin of flexor pollicis longus

A

Radial shaft, interosseous membrane

53
Q

Insertion of flexor pollicis longus

A

Distal phalanx of pollex

54
Q

Innervation of flexor pollicis longus

A

Anterior interosseous (from median)

55
Q

Action of flexor pollicis longus

A

Flexion of IP joint of pollex

56
Q

Origin of pronator quadratus

A

Distal medial ulna

57
Q

Insertion of pronator quadratus

A

Distal lateral radius

58
Q

Innervation of pronator quadratus

A

Anterior interosseous (from median)

59
Q

Action of pronator quadratus

Musculoskeletal Anatomy (11 decks)

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