Axillary Nerve Anatomy

The axillary nerve which is also called the circumflex nerve emerges from the posterior cord of a network of nerves called the brachial plexus right at the level of the armpit. Enters and passes backwards through the quadrangular space.

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It terminates by dividing into anterior and posterior divisions.

Axillary nerve anatomy. Posterior terminal branch provides motor innervation to the posterior aspect. Axillary nerve arises in the axilla from posterior cord of brachial plexus behind the third part of axillary artery. It emerges from the posterior cord of the brachial plexus.

Anterior terminal branch winds around the surgical neck of the humerus. Structure the anterior branch upper branch winds around the surgical neck of the humerus. The axillary nerve then passes medially to the surgical neck of the humerus where it divides into three terminal branches.

The axillary nerve is a major peripheral nerve of the upper limb that originates from the brachial plexus. Paralysis of the deltoid and teres minor muscles. Mixed sensory and motor nerve.

The motor branch of the long head of the triceps brachii arises on average. Posterior circumflex humeral artery. Weakness of arm abduction.

Anaesthesia or loss in sensation of the area of the skin posterior to the deltoid muscle. It then runs backwards in close relation to the capsule of shoulder joint. The trunk of the.

Injury to the axillary nerve can result in the following. Wraps around the surgical neck of the humerus running in the deep deltoid fascia with the posterior circumflex humeral artery. Divides into anterior and posterior branches within the quadrangular space.

Supplies the anterior deltoid muscle. Its a major peripheral nerve of the arm carrying fibers from the fifth and sixth cervical vertebrae c5 and c6 which are in near the base of the neck. The posterior branch lower branch supplies the teres minor and the posterior part of the deltoid.

Wasting of the deltoid muscle.

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