Anatomy of Axilla & Arm Flashcards
posterior wall of apex border
subscapula
branches of third part: (3)
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
axillary artery is continuous to
subclavian artery
coracobrachialis action
flexes arm in all positions
anastomosis of scapula between:
circumflex scapular and transverse cervical ( a branch of thyrocervical)
apex/superiorly of axillary boundary
cervico-axillary canal
axillary sheath surrounds
cords + axillary vein + axillary artery
Lymphatic vessels ascending with cephalic vein will terminate in the
apical axillary lymph nodes
fracture of shaft
damage radial nerve
wounds in the axilla often involve the axillary vein bc of:
large size and its anterior position in relation to the aixllary artery
lateral wall of apex border
intertubercular sulcus
Quadrilateral space syndrome (QSS)
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.
apical nodes obstruct
cephalic vein
supracondylar fracture
damage median nerve
brachialis innervation
(ANTERIOR)
musculocutaneous
branches of First Part: (1)
Superior Thoracic, supplying all the intercostal muscles of the first and second intercostal ribs.
Biceps function
(ANTERIOR) Function: supinates forearm and, when it is supine, flexes forearm, short head resists dislocation of shoulder.
pathway of lymph node drainage
- humeral + pectoral + subscapular drain into
- central nodes, which drain into
- apical nodes that drain into
- supraclavicular nodes
- and continues to venous drainage
label the following
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
medial + lateral intermuscular septum divides arm into
Anterior + posterior
anterior wall of axillary boundary
pect. major + minor
Name the muscle
triceps
Origin: long head ; infraglenoidtubercle, lateral head; humerussuperior to radial groove, medial; humerusinferior to radial groove.
Insertion: olecranon of ulna.
conditions associated with biceps tendon
Biceps tendinitis
Dislocation of the tendon of the long head of biceps
Torn long head of the biceps