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Anatomy > Arm and Anterior Forearm Muscles > Flashcards

Arm and Anterior Forearm Muscles Flashcards

1
Q

Biceps brachii long head origin

A

Supraglenoid tubercle

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2
Q

Biceps brachii short head origin

A

Coracoid process of scapula

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3
Q

Biceps brachii insertion

A

Radial tuberosity; antebrachial fascia via bicipital aponeurosis

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4
Q

Biceps brachii actions

A

Flexes and supinates forearm; long head weakly flexes arm; short head weakly adducts the abducted arm

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5
Q

Biceps brachii innervation

A

Musculocutaneous nerve

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6
Q

Coracobrachialis origin

A

Coracoid process

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7
Q

Coracobrachialis insertion

A

Anterior surface of humerus midshaft

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8
Q

Coracobrachialis actions

A

Flexes and adducts arm (weak)

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9
Q

Coracobrachialis innervation

A

Musculocutaneous nerve

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10
Q

Brachialis origin

A

Anterior surface of humeral shaft inferior to coracobrachialis

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11
Q

Brachialis insertion

A

Ulnar tuberosity and coronoid process

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12
Q

Brachialis actions

A

Flexes forearm

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13
Q

Brachialis innervation

A

Musculocutaneous nerve

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14
Q

What are the anterior compartments of the arm?

A

Biceps brachii, coracobrachialis, brachialis

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15
Q

What are the posterior compartments of the arm?

A

Triceps brachii, anconeus

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16
Q

All arm muscles in the anterior compartment are innervated and supplied by what?

A

Innervated by musculocutaneous nerve and supplied by branches of the brachial artery

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17
Q

All arm muscles in the posterior compartment are innervated and supplied by what?

A

Innervated by radial nerve and supplied by branches of the profounda brachii artery

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18
Q

Triceps brachii long head origin

A

Infraglenoid tubercle of scapula

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19
Q

Triceps brachii lateral head origin

A

Posterior surface of humerus superior to spiral groove

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20
Q

Triceps brachii medial head origin

A

Posterior surface of humerus inferior to spiral groove

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21
Q

Triceps brachii insertion

A

Olecranon process of ulna

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22
Q

Triceps brachii actions

A

Extends forearm, long head weakly extends and adducts arm

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23
Q

Triceps brachii innervation

A

Radial nerve

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24
Q

Anconeus origin

A

Lateral epicondyle of humerus

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25
Q

Anconeus insertion

A

Lateral surface of olecranon process of ulna

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26
Q

Anconeus actions

A

Weakly extends forearm and stabilizes elbow joint

27
Q

Anconeus innervation

A

Radial nerve

28
Q

What are the anterior superficial compartments of the forearm?

A

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

29
Q

All forearm muscles in the anterior superficial compartment are innervated and supplied by what?

A

Innervated by median nerve (except flexor carpi ulnaris) and supplied by branches of radial and ulnar arteries.

30
Q

Pronator teres origin

A

Medial epicondyle of humerus, coronoid process of ulna

31
Q

Pronator teres insertion

A

Lateral radius at midshaft

32
Q

Pronator teres actions

A

Pronates forearm

33
Q

Pronator teres innervation

A

Median nerve

34
Q

Flexor carpi radialis origin

A

Medial epicondyle of humerus

35
Q

Flexor carpi radialis insertion

A

Base of Metacarpal 2

36
Q

Flexor carpi radialis actions

A

Flexes and abducts wrist

37
Q

Flexor carpi radialis innervation

A

Median nerve

38
Q

Palmaris longus origin

A

Medial epicondyle of humerus

39
Q

Palmaris longus insertion

A

Palmar aponeurosis

40
Q

Palmaris longus actions

A

Weakly flexes wrist

41
Q

Palmaris longus innervation

A

Median nerve

42
Q

Flexor carpi ulnaris origin

A

Humeral head: medial epicondyle of humerus

Ulnar head: medial olecranon process, posterior border of ulna

43
Q

Flexor carpi ulnaris insertion

A

Pisiform bone, hook of hamate bone, and base of Metacarpal 5

44
Q

Flexor carpi ulnaris actions

A

Flexes and adducts wrist

45
Q

Flexor carpi ulnaris innervation

A

Ulnar nerve

46
Q

Flexor digitorum superficialis origin

A

Humeroulnar head: medial epicondyle, coronoid process of ulna
Radial head: proximal anterior surface of radius

47
Q

Flexor digitorum superficialis insertion

A

By 4 separate tendons to bases of middle phalanges of Digits 2-5

48
Q

Flexor digitorum superficialis actions

A

Flexes proximal interphalangeal (PIP), metacarpophalangeal (MP), and wrist joints

49
Q

Flexor digitorum superficialis innervation

A

Median nerve

50
Q

What are the anterior deep compartments of the forearm?

A

Flexor digitorum profundus, Flexor pollicis longus, Pronator quadratus

51
Q

All forearm muscles in the anterior deep compartment are innervated and supplied by what?

A

Innervated by median nerve and supplied by anterior interosseous artery

52
Q

Flexor digitorum profundus origin

A

Upper three quarters of ulnar shaft and adjacent interosseous membranes

53
Q

Flexor digitorum profundus insertion

A

By 4 separate tendons to bases of distal phalanges of Digits 2-5

54
Q

Flexor digitorum profundus actions

A

Flexes distal and proximal interphalangeal (DIP & PIP) joints, MP joints, and wrist

55
Q

Flexor digitorum profundus innervation

A 
Lateral half (Digits 2-3): median nerve
Medial half (Digits 4-5): ulnar nerve
56
Q

Flexor pollicis longus origin

A

Anterior radial shaft and adjacent interosseous membrane

57
Q

Flexor pollicis longus insertion

A

Base of distal phalanx of thumb

58
Q

Flexor pollicis longus actions

A

Flexes IP, MP, and carpometacarpal joints of thumb; assist wrist flexion

59
Q

Flexor pollicis longus innervation

A

Median nerve

60
Q

Pronator quadratus origin

A

Lower one fourth of ulnar shaft

61
Q

Pronator quadratus insertion

A

Lower one fourth of radial shaft

62
Q

Pronator quadratus actions

A

Pronates forearm

63
Q

Pronator quadratus innervation

A

Median nerve

Anatomy (6 decks)

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