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Clinical Anatomy 1 > Axilla & Arm > Flashcards

Axilla & Arm Flashcards

1
Q

Anconeus AAIN

A

Attachments: lateral epicondyle of humerus to lateral surface of the olecranon process
Actions: extension of elbow
Innervation: radial nerve
Nerve roots: C7-8

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2
Q

Biceps Brachii AAIN

A

Attachments: coracoid process (short head) and supraglenoid tubercle (long head) of the scapula to the radial tuberosity and the deep antebrachial fascia (through the bicipital aponeurosis)
Actions: flexion of the shoulder and elbow & supination of the forearm
Innervation: musculocutaneous nerve
Nerve roots: C5-6

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3
Q

Brachialis AAIN

A

Attachments: distal anterior shaft of the humerus & lateral & medial intermuscular septa to the conoid process & ulnar tuberosity
Actions: flexion of the elbow
Innervation: musculocutaneous nerve & small branch from radial nerve
Nerve roots: C5-6

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4
Q

Coracobrachialis AAIN

A

Attachments: coracoid process to the proximal medial shaft of the humerus
Actions: flexion and adduction of the shoulder
Innervation: musculocutaneous nerve
Nerve roots: C6-7

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5
Q

Triceps Brachii AAIN

A

Attachments: infraglenoid tubercle of the scapula (long head) and proximal posterolateral (lateral head) and distal posteromedial (medial) shaft of the humerus to the olecranon process of the ulna
Actions: extension of the shoulder (long head) and extension of the elbow (long, lateral and medial heads)
Innervation: radial nerve
Nerve roots: C6-T1

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6
Q

What are the boundaries and contents of the axilla?

A

Boundaries: 1st rib, clavicle (apex), skin of armpit (base), pectoral muscles (anterior), scapula and subscap muscles (posterior), thoracic wall and serratus anterior muscles (medial), humerus (lateral)

Contents: axillary artery/vein, axillary lymph nodes, 3 cords of the brachial plexus (medial, posterior, lateral)

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7
Q

Spinal cord segments of dorsal scapular nerve

A

C4-5

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8
Q

Spinal cord segments of long thoracic nerve

A

C5-7

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9
Q

Spinal cord segments of suprascapular nerve

A

C4-6

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10
Q

Spinal cord segments of subclavian nerve

A

C5-6

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11
Q

Spinal cord segments of lateral pectoral nerve

A

C5-7

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12
Q

Spinal cord segments of musculocutaneous nerve

A

C5-7

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13
Q

Spinal cord segments of median nerve

A

C5-C7 (lateral root)

C8-T1 (medial root)

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14
Q

Spinal cord segments of medial pectoral nerve

A

C8-T1

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15
Q

Spinal cord segments of medial cutaneous nerves of the arm & forearm

A

C8-T1

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16
Q

Spinal cord segments of ulnar nerve

A

C7-T1

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17
Q

Spinal cord segments of upper subscapular nerve

A

C5-6

18
Q

Spinal cord segments of thoracodorsal nerve

A

C6-8

19
Q

Spinal cord segments of lower subscapular nerve

A

C5-6

20
Q

Spinal cord segments of axillary nerve

A

C5-6

21
Q

Spinal cord segments of radial nerve

A

C5-T1

22
Q

Function of dorsal scapular nerve

A

PG S & M: levator scapulae & rhomboid

23
Q

Function of long thoracic nerve

A

S, PG S & M: serratus anterior

24
Q

Function of suprascapular nerve

A

S, PG S & M: supraspinatus & infraspinatus

25
Q

Function of the subclavian nerve

A

S, PG S & M: subclavius

26
Q

Function of the lateral pectoral nerve

A

S, PG S & M: pectoralis major & minor

27
Q

Function of the musculocutaneous nerve (muscular branches & lateral cutaneous nerve of the forearm)

A

Muscular branches: S, PG S & M: biceps brachii, coracobrachialis, and brachialis
Lateral cutaneous nerve of the forearm: S & PG S: skin overlying the lateral aspect of the forearm

28
Q

Function of the medial pectoral nerve

A

S, PG S & M: pectoralis major & minor

29
Q

Function of the medial cutaneous nerves of the arm & forearm

A

S & PG S: skin overlying the medial aspect of the arm & forearm

30
Q

Function of the upper subscapular nerve

A

S, PG S & M: subscapularis

31
Q

Function of the thoracodorsal nerve

A

S, PG S & M: latissimus dorsi

32
Q

Function of the lower subscapular nerve

A

S, PG S & M: subscapularis & teres major

33
Q

Function of the axillary nerve

A

Muscular branches in the arm: S, PG S & M: deltoid & teres minor
Superior lateral cutaneous nerve of the arm: S & PG S: skin overlying the superior lateral aspect of the arm

34
Q

Function of radial nerve (muscular branches in the arm only)

A

S, PG S & M: triceps brachii & brachialis

35
Q

What is the convention for naming cervical nerves?

A

Nerve is named after the spinous process it exits above (ex. C5-C6 would be C6)

36
Q

What is the convention for naming thoracic nerves (and all other than cervical)?

A

Nerve is named after the spinous process it exits below (ex. T1-T2 would be T1)

37
Q

What is the location/contents of the triangular space?

A

Borders: teres minor, major & triceps brachii long head
Contents: circumflex scapular artery

38
Q

What is the location/contents of the triceps hiatus?

A

Borders: triceps brachii long head, teres major, humerus/triceps brachii medial head
Contents: radial n, profundi brachii a

39
Q

Contents/actions/innervations/blood supply to anterior arm compartment

A

Muscles: biceps brachii, brachialis, coracobrachialis
Actions: shoulder and elbow flexion
Innervations: musculocutaneous n
Blood supply: brachial a

40
Q

Contents/actions/innervations/blood supply to posterior arm compartment

A

Muscles: triceps brachii, anconeus
Actions: shoulder and elbow extension
Innervation: radial n
Blood supply: profunda brachii a

41
Q

What would the most common dislocation of the shoulder be (based on joint structure and ligaments)?

A

Anterior dislocation

42
Q

What neuromuscular structures would be injured due to bone fracture at the surgical neck of the humerus? Radial groove of the humerus?

A

Surgical neck: axillary n, posterior circumflex humeral a

Radial groove of the humerus: axillary n, anterior/posterior circumflex humeral a

Clinical Anatomy 1 (6 decks)

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