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upper limb muscles info Flashcards

1
Q

Abductor pollicis brevis

A

Median nerve (recurrent branch)

Abducts thumb

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2
Q

Abductor pollicis longus

A

Median nerve

Abducts and extends thumb at carpometacarpal joint

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3
Q

Adductor pollicis

A

Ulnar nerve (deep branch)

adducts thumb

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4
Q

Abductor digiti minimi

A

ulnar nerve

abducts little finger

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5
Q

Anconeus

A

Radial nerve

Assists triceps brachii in extending elbow, abducts ulna in pronation

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6
Q

Biceps brachii

A

Musculocutaneous nerve

Flexes and supinates forearm at elbow

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7
Q

Brachialis

A

Musculocutaneous nerve and radial nerve

Flexes forearm at elbow

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8
Q

Brachioradialis

A

Radial nerve

Weak flexion of forearm when forearm is midpronated

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9
Q

Coracobrachialis

A

Musculocutaneous nerve

Flexes and adducts arm at shoulder

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10
Q

Deltoid

A

Axillary nerve

Clavicular part: flexes and medially rotates arm Acromial part: abducts arm beyond initial 15 degrees done by supraspinatus Spinous part: extends and laterally rotates arm

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11
Q

Dorsal interosseous muscles

A

Ulnar nerve (deep branch)

Abduct digits; flex digits at metacarpophalangeal joint and extend interphalangeal joints

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12
Q

Extensor carpi radialis brevis

A

Radial nerve (deep branch)

Extends and abducts hand at wrist

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13
Q

Extensor carpi radialis longus

A

Radial nerve

Extends and abducts hand at wrist

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14
Q

Extensor carpi ulnaris

A

Radial nerve (posterior interosseous nerve)

Extends and adducts hand at wrist

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15
Q

Extensor digiti minimi

A

Radial nerve (posterior interosseous nerve)

Extends 5th digit

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16
Q

Extensor digitorum

A

Radial nerve (posterior interosseous nerve)

Extends medial four digits, assists in wrist extension

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17
Q

Extensor indicis

A

Radial nerve (posterior interosseous nerve)

Extends 2nd digit and helps extend hand at wrist

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18
Q

Extensor pollicis brevis

A

Radial nerve (posterior interosseous nerve)

Extends proximal phalanx of thumb at carpometacarpal joint

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19
Q

Extensor pollicis longus

A

Radial nerve (posterior interosseous nerve)

Extends distal phalanx of thumb at interphalangeal and metacarpophalangeal joints

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20
Q

Flexor carpi radialis

A

Median nerve

Flexes and abducts hand at wrist

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21
Q

Flexor carpi ulnaris

A

Ulnar nerve

Flexes and adducts hand at wrist

22
Q

Flexor digiti minimi brevis

A

Ulnar nerve (deep branch)

Flexes proximal phalanx of little finger

23
Q

Flexor digitorum profundus

A

Medial part: ulnar nerve
Lateral part: median nerve

Flexes distal phalangeal bones of medial four digits, assists with flexion of hand at wrist

24
Q

Flexor digitorum superficialis

A

Median nerve

Flexes middle and proximal phalangeal bones of medial four digits, flexes hand at wrist

25
Q

Flexor pollicis brevis

A

Median nerve (recurrent branch)

Flexes proximal phalanx of thumb

26
Q

Flexor pollicis longus

A

Median nerve (anterior interosseous nerve)

Flexes phalangeal bones of thumb

27
Q

Infraspinatus

A

Suprascapular nerve

Lateral rotation of arm

28
Q

Latissimus dorsi

A

Insertion: Intertubercular sulcus of humerus

innervation: Thoracodorsal nerve
action: Extends, adducts, and medially rotates humerus

29
Q

Levator scapulae

A

Anterior rami of C3–C4 and dorsal scapular nerve

Elevates scapula medially, inferiorly rotates glenoid fossa

30
Q

Lumbrical, first and second

A

Median nerve (digital branches)

Extend digits at interphalangeal joints, flex metacarpophalangeal joints

31
Q

Lumbrical, third and fourth

A

Ulnar nerve (deep branch)

Extends digits at interphalangeal joints, flex metacarpophalangeal joints

32
Q

Opponens digiti minimi

A

Ulnar nerve (deep branch)

draws 5th metacarpal anteriorly and rotates it to face thumb

33
Q

Opponens pollicis

A

Median nerve (recurrent branch)

Draws 1st metacarpal forward and rotates it medially

34
Q

Palmar interosseous muscles

A

Ulnar nerve (deep branch)

Adducts digits; flexes digits and extends interphalangeal joints

35
Q

Palmaris brevis

A

Superficial branch of ulnar nerve

deepens hollow of hand, assists grip

36
Q

Palmaris longus

A

Median nerve

Flexes hand at wrist and tenses palmar aponeurosis

37
Q

Pectoralis major

A

Medial and lateral pectoral nerves

Flexes, adducts, and medially rotates arm

38
Q

Pectoralis minor

A

Medial pectoral nerve

Lowers lateral angle of scapula and protracts scapula

39
Q

Pronator quadratus

A

Median nerve (anterior intero sseous nerve)

pronates forearm

40
Q

Pronator teres

A

Median nerve

pronates forearm and weakly flexes elbow

41
Q

Rhomboid major

A

Dorsal scapular nerve

Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity

42
Q

Rhomboid minor

A

Dorsal scapular nerve

Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity

43
Q

Serratus anterior

A

Long thoracic nerve

Protracts and rotates scapula and holds it against thoracic wall

44
Q

Subclavius

A

Nerve to subclavius

Anchors and depresses clavicle

45
Q

Subscapularis

A

Upper and lower subscapular nerves

Medially rotates and adducts arm; helps hold humeral head in glenoid fossa

46
Q

Supinator

A

Radial nerve (deep branch)

Supinates forearm

47
Q

Supraspinatus

A

Suprascapular nerve

Initiates arm abduction

48
Q

Teres major

A

Lower subscapular nerve

Adducts and medially rotates arm

49
Q

Teres minor

A

Axillary nerve

Laterally rotates arm

50
Q

Trapezius

A

Accessory nerve (cranial nerve XI)

Elevates, retracts, and rotates scapula; lower fibers depress scapula

51
Q

Triceps brachii

A

radial nerve

Extends forearm at elbow; long head stabilizes head of abducted humerus and extends and adducts arm

My Anatomy (11 decks)

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