Quadrangular Space

Description

Diagram showing the quadrilateral space (red area) and the site of the fibrous band extending from the long head of the triceps to the humerus (black line). The axillary nerve is represented by a yellow circle.

View of quadrilateral space

Name

• Quadrangular Space
• Quadrilateral Space of Velpeau
• Foramen humerotricipitale

General

• Anatomical space in the posterior axilla
• Provides a conduit to transmit structures from the axilla into the posterior arm

Borders

• Superior: inferior margin of teres minor
• Lateral: surgical neck of the humerus
• Medial: long head of triceps brachii
• Inferior: superior aspect of teres major
• Anterior: subscapularis

Contents

• Axillary Nerve
• Posterior Circumflex Humeral Artery

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Clinical Significance

• Quadrilateral Space Syndrome

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See Also

• Shoulder Pain Main
• Physical Exam Shoulder
• Shoulder Anatomy Main

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