THIRD SESSIONTHIRD SESSION

AXILLARY REGIONAXILLARY REGIONOr FOSSA Or FOSSA

Pyramidal shape with 4 walls, Pyramidal shape with 4 walls, base base . and apex. and apex•Anterior or pectoral wall Anterior or pectoral wall

•Posterior or scapular wallPosterior or scapular wall

•Medial or costal wallMedial or costal wall

•Lateral or humeral wall (bony Lateral or humeral wall (bony wall)wall)

•ApexApex

•BaseBase

Pectoral wall

1- superficial layer:Pectoralis major . and its fascia

Pectoral wall

2- deep layer: Pectoralis minor and subclavius and . . clavipectoral fascia

Scapular wall

1-Subscapularis muscle

2-Teres major

3-Latissimus Dorsi

Costal wall

1-Serratus anterior muscle

2-First four ribs and intercostal muscles

Humeral wall

1-intertubercular groove

2-coracobrachialis and biceps muscles

Apex of axillary fossa

Base of axillary fossa

Pectoral region

• 1-pectoralis major

• 2-pectoralis minor

• 3-subclavius• Pectoral and clavipectoral fascia

Clavipectoral FasciaClavipectoral Fascia

Three anatomical elements that Three anatomical elements that perforate this fasciaperforate this fascia : :

1- cephalic vein1- cephalic vein 2-thoracoacromial artery and 2-thoracoacromial artery and veinvein 3-lateral pectoral nerve3-lateral pectoral nerve

Scapular region

Ant. Scapular region 1-subscapularis muscle

Post. Scapular region 1-supraspinatus muscle 2-infraspinatus muscle 3-teres minor muscle 4-teres major muscle

Subscapularis muscle

Rotator cuff

Subscapualris muscle Supraspinatus muscle Infraspinatus muscle Teres minor muscle

Axillay spaces

Quadrangular spaceTriangular space

Costal regionCostal region

Serratus anterior muscleSerratus anterior muscle

Long thoracic(c5,c6,c7)

Deltoid regionDeltoid region

Deltoid muscleDeltoid muscle