Anatomy of Axilla & Arm Flashcards

1
Q

posterior wall of apex border

A

subscapula

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2
Q

branches of third part: (3)

A

1-Subscapular, which divides into two arteries that go to the back and supply the muscles of the scapular region -subscapular branches into thoracodorsal + circumflex scapular 2/3-posterior / anterior circumflex that pass around the surgical neck

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3
Q

axillary artery is continuous to

A

subclavian artery

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4
Q

coracobrachialis action

A

flexes arm in all positions

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5
Q

anastomosis of scapula between:

A

circumflex scapular and transverse cervical ( a branch of thyrocervical)

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6
Q

apex/superiorly of axillary boundary

A

cervico-axillary canal

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7
Q

axillary sheath surrounds

A

cords + axillary vein + axillary artery

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8
Q

Lymphatic vessels ascending with cephalic vein will terminate in the

A

apical axillary lymph nodes

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9
Q

fracture of shaft

A

damage radial nerve

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10
Q

wounds in the axilla often involve the axillary vein bc of:

A

large size and its anterior position in relation to the aixllary artery

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11
Q

lateral wall of apex border

A

intertubercular sulcus

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12
Q

Quadrilateral space syndrome (QSS)

A

happens when the axillary nerve is compressed, or injured in the back of the shoulder.

Sometimes the symptoms are caused by the compression of an artery in the same area

Usually happens from overuse, especially with overhead sports like throwing and swimming.

The syndrome can also be caused by an injury, like a shoulder dislocation.

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13
Q

apical nodes obstruct

A

cephalic vein

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14
Q

supracondylar fracture

A

damage median nerve

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15
Q

brachialis innervation

A

(ANTERIOR)

musculocutaneous

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16
Q

branches of First Part: (1)

A

Superior Thoracic, supplying all the intercostal muscles of the first and second intercostal ribs.

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17
Q

Biceps function

A

(ANTERIOR) Function: supinates forearm and, when it is supine, flexes forearm, short head resists dislocation of shoulder.

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18
Q

pathway of lymph node drainage

A
  1. humeral + pectoral + subscapular drain into
  2. central nodes, which drain into
  3. apical nodes that drain into
  4. supraclavicular nodes
  5. and continues to venous drainage
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19
Q

label the following

A

1- Acromioclavicular joint

2- Acromion

5- Axillary artery and vein

8- Biceps brachii tendon

9- Clavicle

10- Coracobrachialis

11- Coracoclavicular ligament

15- Deltoid muscle

16- Gleniod

17- Glenoid labrum

19- head of humerus

20- Humerus

23- Infraspinatus muscle

26- Pectoralis minor

31- Spine of scapula

32- Subscapularis

36- Supraspinatus muscle

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20
Q

medial + lateral intermuscular septum divides arm into

A

Anterior + posterior

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21
Q

anterior wall of axillary boundary

A

pect. major + minor

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22
Q

Name the muscle

A

triceps

Origin: long head ; infraglenoidtubercle, lateral head; humerussuperior to radial groove, medial; humerusinferior to radial groove.

Insertion: olecranon of ulna.

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23
Q

conditions associated with biceps tendon

A

Biceps tendinitis

Dislocation of the tendon of the long head of biceps

Torn long head of the biceps

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24
Q

fracture of surgical neck

A

damage axillary nerve (loss of abduction bc deltoid will be affected)

25
Q

triceps action

A

extends the forearm

26
Q

2nd part of axillary artery is

A

posterior of pect. minor

27
Q

fracture of medial epicondyle

A

damage ulnar nerve (results in severe numbness in the fingers)

28
Q

medial wall of apex border

A

serratus anterior

29
Q

fracture of surgical neck

A

damage axillary nerve (loss of abduction bc deltoid will be affected)

30
Q

anconeus action

A

(POSTERIOR)

assists triceps in extending forearm, stabilizes elbow joint and abduct ulna during pronation.

31
Q

Lymphatic vessels ascending with basilic vein will terminate in the

A

humeral axillary lymph nodes

32
Q

3rd part of axillary artery

A

inferior of pect minor to lower border of teres major

33
Q

axillary vein is formed by the union of

A

brachial vein (Deep) and the basilic vein (superficial) at the inferior border of teres major.

34
Q

inlet of axixlla

A

clavicle (ant) +1st rib (medially) + scapula (post)

35
Q

The axilla is the pyramidal space inferior to the ____________ and superior to the _______________________.

A

glenohumeral joint axillary fascia at the junction of the arm and thorax

36
Q

triceps innervation

A

(POSTERIOR)

radial nerve

37
Q

base of axillary boundary

A

skin + subcutaneous tissue + fascia

38
Q

anterior compartment of the arm is supplied and innervated by

A

musculocutaneous nerve and brachial artery

39
Q

branches of second part: (2)

A

Thoracoacromial, which as soon as it leaves the axillary area supplies the deltoid, pec major, pec minor, and the lateral thoracic

40
Q

label the following:

A
41
Q

anconeus innervation

A

(POSTERIOR)

radial nerve

42
Q

quadrangular space (boundaries and what passes through it)

A
  • Teres Minor superiorly
  • Long head of triceps medially
  • Large head of triceps and humerus laterally
  • Teres Major inferiorly

The axillary nerve and posterior circumflex artery passes through this space to supply the posterior aspect of the muscles of that area.

43
Q

name the muscle

A

anconeus

Origin: lateral epicondyle of humerus.

Insertion: lateral surface of olecranon.

44
Q

During axillary lymph node dissection, two nerves are in danger of injury

A

long thoracic & thoracodorsal

45
Q

brachialis action:

A

(ANTERIOR)

flexes forearm in all positions.

46
Q

label the following:

A
47
Q

triangular interval (boundaries + what passes through it)

A

Lower triangle bound by the teres major and the two heads of the triceps

includes the radial nerve to supply the posterior of the arm.

48
Q

triangular space (boundaries & what passes through it)

A
  • Bounded by the teres major, teres minor, and long head of the triceps.

Contains the circumflex scapular artery.

49
Q

label the following:

A
50
Q

Name the muscle

A

biceps

Origin: short head coracoid, long head supraglenoidtubercle.

Insertion: tuberosity of radius, bicipitalaponeurosis.

51
Q

name the muscle

A

brachialis

Origin: distal half of humerus.

Insertion: coronoid process & tuberosity of ulna.

52
Q

Biceps innervation

A

(ANTERIOR) musculocutaneous

53
Q

posterior compartment of the arm is supplied and innervated by

A

radial nerve and profunda brachii artery

54
Q

Name the muscle

A

coracobrachialis

Origin: coronoid process of scapula.

Insertion: middle third of medial surface of humerus.

55
Q

label the following:

A
56
Q

1st part of axillary artery b/w

A

1st rib to superior aspect of pect. minor

57
Q

label the following:

A
58
Q

coracobrachialis innervation

A

(ANTERIOR)

musculocutaneous