What are the main structures found in the Quadrilateral Space?

What are the main structures found in the Quadrilateral Space?

• A. Medial and Lateral Pectoral Nerves
• B. Axillary Nerve and Posterior Circumflex Humeral Artery
• C. Radial Nerve and Brachial Artery
• D. Musculocutaneous Nerve and Axillary Vein

Answer: (B)

The primary structures located in the Quadrilateral Space are indeed the Axillary Nerve and the Posterior Circumflex Humeral Artery. This anatomical space is significant as it allows important neurovascular structures to traverse from the axillary region to the shoulder area. The Axillary Nerve is responsible for innervating the deltoid and teres minor muscles while also providing sensory innervation to the skin overlying the deltoid muscle. Meanwhile, the Posterior Circumflex Humeral Artery supplies blood to the shoulder joint and surrounding areas. Their presence in this space is crucial for the proper functioning and vascularization of the shoulder region, making it an area of interest in injuries or pathologies affecting the shoulder, such as shoulder dislocations which may impact these structures. Understanding the anatomy of the Quadrilateral Space and its contents is essential for clinicians to properly assess and manage shoulder injuries and conditions that may lead to nerve or vascular compromise in this region.

The primary structures located in the Quadrilateral Space are indeed the Axillary Nerve and the Posterior Circumflex Humeral Artery. This anatomical space is significant as it allows important neurovascular structures to traverse from the axillary region to the shoulder area.

The Axillary Nerve is responsible for innervating the deltoid and teres minor muscles while also providing sensory innervation to the skin overlying the deltoid muscle. Meanwhile, the Posterior Circumflex Humeral Artery supplies blood to the shoulder joint and surrounding areas. Their presence in this space is crucial for the proper functioning and vascularization of the shoulder region, making it an area of interest in injuries or pathologies affecting the shoulder, such as shoulder dislocations which may impact these structures.

Understanding the anatomy of the Quadrilateral Space and its contents is essential for clinicians to properly assess and manage shoulder injuries and conditions that may lead to nerve or vascular compromise in this region.