What are the branches of the axillary nerve?
Axillary nerve
| Origin | Posterior cord of brachial plexus (C5-C6) |
|---|---|
| Branches | Anterior, posterior, articular branches |
| Innervation | Motor – deltoid muscle, teres minor muscle, lateral head of the triceps brachii muscle Sensory – glenohumeral joint, skin of the deltoid region/upper arm |
What happens if the axillary nerve is damaged?
Axillary nerve dysfunction is nerve damage that can lead to a loss of movement or sensation in the shoulder. Conditions associated with axillary nerve dysfunction include fracture of the humerus (upper arm bone), pressure from casts or splints, and improper use of crutches.
What type of nerve is axillary nerve?
Your axillary nerve, also known as the circumflex nerve, is one of five peripheral nerves that run through your shoulder. Axillary nerves start in your neck at the brachial plexus (a network of nerves in your shoulder). This network of nerves enables movement and sensation to your upper limbs.
What are the roots of axillary nerve?
The axillary nerve receives its nerve fibers from the C5 and C6 nerve roots and is a terminal branch of the posterior cord of the brachial plexus.
Can axillary nerve damage be fixed?
In many cases, axillary nerve injury will heal on its own. This may take several months. During that time it is important to do physical therapy to maintain flexibility across the shoulder joint. If after several months, the weakness does not improve, then surgery to treat the nerve injury is indicated.
What nerve causes armpit pain?
What is Intercostobrachial Neuralgia, and Who Gets It? Intercostobrachial neuralgia is a rare but very bothersome nerve pain issue. This is a nerve pain issue in which nerves coming from the upper thoracic spine and going into your armpit upper inner arm, and upper chest wall are damaged and cause pain in this region.
What is innervated by the axillary nerve?
After exiting the quadrangular space posteriorly, the anterior branch of the axillary nerve wraps around the surgical neck of the humerus, with the posterior humeral circumflex artery, to then innervate the deltoid muscle.
Key facts about the axillary nerve Origin Posterior cord of brachial plexus (C5-C6 Branches Anterior, posterior, articular branches Innervation Motor – deltoid muscle, teres minor musc Clinical relations Neuropathy, quadrangular space syndrome
Where does the axillary nerve exit the spinal column?
After leaving the spinal column, the axillary nerve runs behind the axillary artery and continues down to the lower edge of the subscapularis muscle on the shoulder blade. It winds backward and travels down the arm along the posterior humeral circumflex artery.
What is the function of the axillary nerve in the shoulder?
Motor Functions. The axillary nerve innervates teres minor and deltoid muscles. Teres minor – part of the rotator cuff muscles which act to stabilise the glenohumeral joint. It acts to externally rotate the shoulder joint and is innervated by the posterior terminal branch of the axillary nerve.
What is the clinical significance of axillary nerve palsy?
Clinical significance. An example of injury to the axillary nerve includes axillary nerve palsy. Injury to the nerve results in: Paralysis of the teres minor muscle and deltoid muscle, resulting in loss of abduction of arm (from 15-90 degrees), weak flexion, extension, and rotation of shoulder.