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Anatomy 1 (post) > axilla and arm LOs > Flashcards

axilla and arm LOs Flashcards

1
Q

aconeus m.

A
  • BL: lateral epicondyle of humerus > lateral surface of olecranon process (ulna)
  • action: extension of elbow
  • innervation: radial nerve
  • SC segment: C7-8
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2
Q

biceps brachii m.

A
  • BL: coracoid process (short head), supraglenoid tubercle (long head) of scapula > radial tuberosity and deep antebrachial fascia (through bicipital aponeurosis)
  • action: flexion of shoulder and elbow, supination of forearm
  • innervation: musculocutaneous nerve
  • SC segment: C5-6
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3
Q

brachialis m.

A
  • BL: distal anterior shaft of humerus, lateral and medial intermuscular septa > coronoid process and ulnar tuberosity
  • action: flexion of elbow
  • innervation: musculocutaneous nerve, small branch of radial nerve
  • SC segment: C5-6
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4
Q

coracobrachialis m.

A
  • BL: coracoid process > proximal medial shaft of humerus
  • action: flexion and adduction of shoulder
  • innervation: musculocutaneous nerve
  • SC segment: C6-7
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5
Q

triceps brachii m.

A
  • BL: infraglenoid tubercle of scapula (long head), proximal posterolateral (lateral head) and distal posteromedial (medial) shaft of humerus > olecranon process (ulna)
  • action: extension of shoulder (long head), extension of elbow (long, medial, lateral)
  • innervation: radial nerve
  • SC segment: C6-T1
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6
Q

boundaries of axilla

A
  • apex: first rib/clavicle
  • base: skin of armpit
  • anterior: pectoral mm.
  • posterior: scapula, subscapular m.
  • medial: thoracic wall, serratus anterior m.
  • lateral: humerus
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7
Q

C4-5 nerve(s)

A

dorsal scapular

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8
Q

C4-6 nerve(s)

A

suprascapular

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9
Q

C5-6 nerve(s)

A

axillary

subclavian

upper subscapular

lower subscapular

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10
Q

C5-7 nerve(s)

A

musculocutaenous

long thoracic

lateral pectoral

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11
Q

C5-T1 nerve(s)

A

median

radial

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12
Q

C6-8 nerve(s)

A

thoracodorsal

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13
Q

C7-T1 nerve(s)

A
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14
Q

C8-T1 nerve(s)

A

medial pectoral

medial cutaneous of arm

medial cutaneous of forearm

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15
Q

dorsal scapular n. functions

A

C4-5

postganglionic sympathetic

motor

  • to levator scapulaee and rhomboid mm.
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16
Q

long thoracic n. functions

A

C5-7

sesnsory

postganglionic sympathetic

motor

  • to serratus anterior
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17
Q

suprascapular n. functions

A

C4-6

sensory

postganglionic sympathetic

motor

  • to supraspinatus and infraspinatus mm.
18
Q

subclavian n. functions

A

C5-6

sensory

postganglionic sympathetic

motor

  • to subclavius m.
19
Q

lateral pectoral nerve functions

A

C5-7

sensory

postganglionic sympathetic

motor

  • to pectoralis major and minor mm.
20
Q

musculocutaneous n. functions

A

C5-7

sensory

postganglionic sympathetic

motor

  • S/PS/M to biceps brachii, brachialis, coracobrachialis mm.
  • S/PS to lateral aspect of forearm
21
Q

median n. functions

A

C5-T1

sensory

postganglionic sympathetic

motor

  • S/PS/M to flexor carpi radialis, palmaris longus, flexor digitorum superficialis, pronator teres, flexor pollicis longus, flexor digitorum profundus, pronator quadratus, 2 lateral lumbrical, flexor pollicis brevis, abductor pollicis brevis, opponens pollicis mm.
  • S/PS skin overlaying radial aspect of palm and digits 1-4
22
Q

medial pectoral n. functions

A

C8-T1

sensory

postganglionic sympathetic

motor

  • to pectoralis major and minor mm.
23
Q

medial cutaenous n. of arm and forearm functions

A

C8-T1

sensory

postganglinoic sympathetic

  • to skin overlying medial aspect of arm and forearm
24
Q

ulnar n. functions

A

C7-T1

sensory

postganglionic sympathetic

motor

  • S/PS/M to flexor carpi ulnaris, flexor digitorum profundus, abductor digiti minimi, flexor pollicis brevis, opponens digiti, palmar interossei, dorsal interossei, medial 2 lumbricals, adductor pollicis mm.
  • S/PS to skin overlying ulnar side of palm
25
Q

upper subscapular n. functions

A

C5-6

sensory

postganglionic sympathetic

motor

  • to subscapularis m.
26
Q

thoracodorsal n. functions

A

C6-8

sensory

postganglionic sympathetic

motor

  • to latissimus dorsi m.
27
Q

lower subscapular n. functions

A

C5-6

sensory

postganglionic sympathetic

motor

  • to teres major and subscapularis mm.
28
Q

axillary n. functions

A

C5-6

sensory

postganglinoic sympathetic

motor

  • S/PS/M to deltoid and teres minor mm.
  • S/PS to skin overlying superior lateral aspect of arm
29
Q

radial n. functions

A

C5-T1

sensory

postganglionic sympathetic

motor

  • S/PS/M to tripces brachii, brachialis, anconeus, brachioradialis, supinator, extensor carpi radialis longus, extensor carpi radialis bravis, extensor carpi ulnaris, extensor digitorum, extensor digiti minimi, extensor indicis, extensor pollicis brevis, extensor pollicis longus, abductor pollicis longus mm.
  • S/PS to skin overlying posterior aspect of forearm, radial side of dorsum of hand
30
Q

brachial plexus

A
31
Q

triangular space

A

inferior to teres minor

superior to teres major

medial to long head of triceps brachii

  • contains circumflex scapular artery
32
Q

triceps hiatus

A

lateral to triceps brachii long head

inferior to teres major

medial to humerus

  • radial nerve
  • profunda brachii artery
33
Q

anterior arm

A
  • contents: coracobrachilalis, biceps brachii, brachialis
  • action: shoulder and elbow flection
  • innervation: musculocutaneous n.
  • blood supply: brachial a.
34
Q

posterior compartment of arm

A
  • contents: triceps brachii, anconeus
  • action: shoulder and elbow extension
  • innervation: radial n.
  • blood supply: profunda brachii a.
35
Q

most common direction of shoulder dislocation

A

inferior joint capsule not reinforced by rotator cuff or ligaments (especially abducted when arm is abducted)

anterior dislocation is 95% of shoulder dislocations

36
Q

path of drainage of axillary lymph nodes to venous system

A

humeral (hand, forearm, medial arm, deep forearm)

pectoral (anterior thorax, breast)

subscapular (posterior shoulder, posterior thorax, scapula)

central

apical

right subclavian trunk

right lymphatic duct

venous angle

right brachiocephalic vein

superior vena cava

right atrium

37
Q
A

cephalic vein (cross section)

38
Q
A

long head of biceps brachii (cross section)

39
Q
A

short head of biceps brachii (cross section)

40
Q
A

lateral head of triceps brachii (cross section)

41
Q
A

medial head of triceps brachii (cross section)

42
Q
A

long head of triceps brachii (cross section)

Anatomy 1 (post) (38 decks)

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