Dr. Sama ul HaqueDr. Rania Jabr

Objectives

Define axilla.

Give its boundaries and contents.

Axilla(Arm pit)

AXILLA

• A pyramid-shaped.• it is a space

between the upper part of the arm and the side of the chest

• Transmit major neurovascular structures between neck & thorax and upper limbs.

• Axilla has an apex, a base and four walls.

Axilla is a space4 Sided pyramidApex connected to the neck=InletBase Arm pit= OutletAnterior wallPosterior wallMedial wallLateral wall

Apex

directed upward. called Cervicoaxillary

canal. Boundaries:• Clavicle anteriorly.• Upper border of the

scapula posteriorly.• Outer border of the

first rib medially.

CL

A

V

IC

L E

1

R

IB

Base

Formed of Axillary fascia and Skin of the arm pit

1. Pectoralis major2. Pectoralis minor3. Subclavius muscles4. Clavipectoral fascia

Anterior wall

• Subscapularis.• Latissimus dorsi.• Teres major

muscles.

Posterior wall

• Serratus anterior.• Upper 4-5 ribs &

Intercostal muscles .

Medial wall

• Coracobrachialis.• Biceps brachii. • Bicepital groove

of the humerus.

Lateral wall

1. Cords and branches of the brachial plexus

2. Axillary artery and its branches.

3. Axillary vein and its tributaries.

4. Axillary lymph nodes.

5. Axillary lymphatic vessels

6. Axillary fat.7. Loose connective

tissue.8. Axillary sheath

Axillary a. & v.

Brachial plexus

Contents of the axilla

Anterior wall

Medial wall

Lateral wall

Posterior wall