Quadrangular Space

Quadrangular Space

Question. Write briefly about the quadrangular space.
Answer:

The quadrangular space is one of the subscapular intermuscular spaces present in the region of the axilla.

Quadrangular Space Boundaries

Quadrangular Space Superior

• Subscapularis in front
• Teres minor behind
• Capsule of the shoulder joint (in between the subscapularis and the teres minor)

quadrangular space anatomy

Quadrangular Space Inferior:

Teres major

Medial:

Long head of the triceps brachii

Lateral:

Surgical neck of the humerus

Structures passing through the space

boundaries of quadrangular space

• Axillary nerve
• Posterior circumflex humeral vessels

Quadrangular Space Applied Anatomy

The fracture of the surgical neck of the humerus may damage the axillary nerve, leading to paralysis of the deltoid muscle.