Quadrangular space

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Quadrangular space
The scapular and circumflex arteries. (Quadrangular space is visible but not labeled. Posterior humeral circumflex artery is visible entering quadrangular space at center right.)
Suprascapular and axillary nerves of right side, seen from behind. (Quadrangular space is visible but not labeled. Axillary nerve is visible entering quadrangular space at center right.)
Gray's	subject #149 589

The quadrangular space is a location in the arm which is bounded by:

• above/superior: the Subscapularis and Teres minor (inferior border)
• below/inferior: the Teres major (superior border)
• medially: the long head of the Triceps brachii
• laterally: the surgical neck of the humerus

It transmits the axillary nerve and posterior humeral circumflex artery.

Additional images

Gray412-spaces.png Muscles on the dorsum of the scapula, and the Triceps brachii.

External links

• 141230158 at GPnotebook
• SUNY Labs 03:04-0101 - "Scapular Region: Quadrangular Space of Scapular Region"
• Duke Orthopedics quadrangular_space
• Photo at umich.edu
• Diagram at wustl.edu
• Photo at tufts.edu
• Photo at ithaca.edu

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e General anatomy of upper limbs
Arm	Axilla • Axillary sheath • axillary folds (Anterior, Posterior) spaces (Quadrangular space, Triangular space, Triangular interval) • Clavipectoral triangle compartment of arm (Posterior, Anterior) fascia (Axillary, Brachial) - intermuscular septa (Lateral, Medial)
Forearm	Cubital fossa (Bicipital aponeurosis) • Cubital tunnel • common tendons (Extensor, Flexor) • Interosseous membrane of the forearm compartment of forearm (Posterior, Anterior) fascia (Antebrachial fascia)
Hand	posterior: Extensor retinaculum • Extensor expansion • Vincula tendina • Anatomical snuff box anterior: Flexor retinaculum • Carpal tunnel • Palmar aponeurosis • Ulnar canal • Synovial sheath (Common synovial sheath for the flexor tendons]) Finger