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Upper Limb Muscles > Upper Limb > Flashcards

Upper Limb Flashcards

1
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A

Abductor pollicis longus

Posterior (extensor) deep forearm

Posterior interosseous nerve (continuation of deep branch of radial nerve)

  1. Abducts thumb and extends it at carpometacarpal joint
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2
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Adductor pollicis

Adductor-Interosseous compartment

Deep branch of ulnar nerve

  1. Adducts thumb toward lateral border of palm
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3
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Adductor-Interosseus

Ulnar nerve

  1. Adductor pollicis
  2. Palmar interossei
  3. Dorsal interossei
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4
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Biceps brachii

Anterior (flexor) arm

Musculocutaneous nerve

  1. Supinates forearm
  2. Flexes forearm (when supine)
  3. Short head resists dislocation of shoulder
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5
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Brachialis

Anterior (flexor) arm

Musculocutaneous nerve

  1. Flexes forearm in all positions
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6
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Brachioradialis

Posterior (extensor) superficial forearm

Radial nerve

  1. Relatively weak flexion of forearm; maximal when forearm is in mid-pronated position
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7
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Central

  1. Lumbricals
  2. Tendons of flexor digitorum superficialis
  3. Tendons of flexor digitorum profundus
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8
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Coracobrachialis

Anterior (flexor) arm

Musculocutaneous nerve

  1. Flexes arm
  2. Adducts arm
  3. Resists dislocation of shoulder
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9
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Deltoid

Axillary nerve

  1. Flexes, abducts, extends, medially and laterally rotates arm
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10
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Dorsal interossei

Adductor-Interosseous compartment

Deep branch of ulnar nerve

  1. Abducts digits 2-4 from axial line
  2. Act with lumbricals in flexing MCP joints and extending IP joints
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11
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Extensor carpi radialis brevis

Posterior (extensor) superficial forearm

Deep branch of radial nerve

  1. Extends and abducts hand (at wrist)
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12
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Extensor carpi radialis longus

Posterior (extensor) superficial forearm

Radial nerve

  1. Extend and abducts hand (at wrist)
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13
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Extensor carpi ulnaris

Posterior (extensor) superficial forearm

Deep branch of radial nerve

  1. Extends and adducts hand (at wrist)
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14
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Extensor digiti minimi

Posterior (extensor) superficial forearm

Deep branch of radial nerve

  1. Extends 5th digit primarily at MCP joint, secondarily at IP joint
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15
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Extensor digitorum

Posterior (extensor) superficial forearm

Deep branch of radial nerve

  1. Extends medial 4 digits primarily at MCP joints, secondarily at IP joints
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16
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Extensor indicis

Posterior (extensor) deep forearm

Posterior interosseous nerve (continuation of deep branch of radial nerve)

  1. Extends 2nd digit (enabling its independent extension)
  2. Helps extend hand (at wrist)
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17
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Extensor pollicis brevis

Posterior (extensor) deep forearm

Posterior interosseous nerve (continuation of deep branch of radial nerve)

  1. Extends proximal phalanx of thumb at MCP joint
  2. Extends carpometacarpal joints
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18
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Extensor pollicis longus

Posterior (extensor) deep forearm

Posterior interosseous nerve (continuation of deep branch of radial nerve)

  1. Extends distal phalanx of thumb at IP joint
  2. Extends MCP and carpometacarpal joints
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19
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A

Flexor carpi radialis

Anterior (flexor) superficial forearm

Median nerve

  1. Flexes and abducts hand (at wrist)
20
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Flexor carpi ulnaris

Anterior (flexor) superficial forearm

Ulnar nerve

  1. Flexes and adducts hand (at wrist)
21
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A

Flexor digitorum profundus

Anterior (flexor) deep forearm

Anterior interosseous nerve (from median nerve)= digits 1, 2, 3

Ulnar nerve= digits 4, 5

  1. Flexes distal phalanges at distal IP joints
22
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A

Flexor digitorum superficialis

Anterior (flexor) superficial forearm

Median nerve

  1. Flexes middle phalanges at proximal IP joints of middle 4 digits
  2. Flexes proximal phalanges at MCP joints
23
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A

Flexor pollicis longus

Anterior (flexor) deep forearm

Anterior interosseous nerve (from median nerve)

  1. Flexes phalanges of 1st digit (thumb)
24
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A

Hypothenar

Deep branch of ulnar nerve

  1. Abductor digiti minimi
  2. Flexor digiti minimi
  3. Opponens digiti minimi
25
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A

Infraspinatus

Suprascapular nerve

  1. Laterally rotates arm
26
Q
A

Latissimus dorsi

Thoracodorsal nerve

  1. Extends, adducts, and medially rotates humerus
27
Q
A

Levator scapulae

Dorsal scapular nerve

  1. Elevates and retracts scapula
28
Q
A

Lumbricals

Median nerve (1st and 2nd)

Deep branch of ulnar nerve (3rd and 4th)

  1. Flex MCP joints
  2. Extend IP joints of 2nd-5th digits
29
Q
A

Palmar interossei

Adductor-Interosseous compartment

Deep branch of ulnar nerve

  1. Adducts 2nd, 4th, and 5th digits toward axial line
  2. Assists lumbricals in flexing MCP joints and extending IP joints
30
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A

Palmaris longus

Anterior (flexor) superficial forearm

Median nerve

  1. Flexes hand (at wrist)
  2. Tenses palmar aponeurosis
31
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A

Pectoralis major

Lateral pectoral nerve & medial pectoral nerve

  1. Adducts, flexes and medially rotates humerus
  2. Protracts, depresses, and downwardly rotates scapula
32
Q
A

Pectoralis minor

Medial pectoral nerve

  1. Depresses and inferiorly rotates scapula
33
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A

Pronator quadratus

Anterior (flexor) deep forearm

Anterior interosseous nerve (from median nerve)

  1. Pronates forearm
34
Q
A

Pronator teres

Anterior (flexor) forearm

Median nerve

  1. Pronates and flexes forearm
35
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A

Rhomboid major

Dorsal scapular nerve

  1. Retracts and elevates scapula
36
Q
A

Rhomboid minor

Dorsal scapular nerve

  1. Retracts and elevates scapula
37
Q
A

Serratus anterior

Long thoracic nerve

  1. Protracts and rotates scapula
38
Q
A

Subscapularis

Upper subscapular nerve & lower subscapular nerve

  1. Medially rotates arm
39
Q
A

Supinator

Posterior (extensor) deep forearm

Deep branch of radial nerve

  1. Supinates forearm
40
Q
A

Supraspinatus

Suprascapular nerve

  1. Initiates abduction of arm
41
Q
A

Teres major

Lower subscapular nerve

  1. Adducts, extends, and medially rotates arm
42
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A

Teres minor

Axillary nerve

  1. Laterally rotates arm
43
Q
A

Thenar

Recurrent branch of median nerve

  1. Opponens pollicis
  2. Abductor pollicis
  3. Flexor pollicis brevis
44
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A

Trapezius

Accessory nerve (CN XI)

  1. Elevates, depresses, retracts (adducts), and rotates and scapula upward
45
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Triceps brachii

Posterior (extensor) arm

Radial nerve

  1. Chief extensor of forearm
  2. Long head resists dislocation of humerus

Upper Limb Muscles (2 decks)

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