What is the cutaneous innervation of the axillary nerve?
What is the cutaneous innervation of the axillary nerve?
After the posterior terminal branch of the axillary nerve has innervated the teres minor, it continues as the upper lateral cutaneous nerve of the arm. It innervates the skin over the inferior portion of the deltoid (the ‘regimental badge area’).
Which muscles are innervated by the axillary nerve?
Usually, the axillary nerve contains fibers from the C5 and C6 ventral rami. This nerve innervates the teres minor and deltoid muscles, the skin over the shoulder (upper lateral brachial nerve), and the glenohumeral joint.
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 does the axillary nerve control?
Axillary nerve dysfunction is a form of peripheral neuropathy. It occurs when there is damage to the axillary nerve. This is the nerve that helps control the deltoid muscles of the shoulder and the skin around it.
How do I know if I have an axillary nerve?
The motor part of the axillary nerve is isolated and divided as far as possible from its entry to the deltoid muscle. The radial nerve branches to the three heads of the triceps muscle are then identified. We usually use the motor branch to either the lateral or medial head of the triceps.
How do you treat axillary nerve damage?
Surgical Options The standard modalities of neurolysis, neurorrhaphy, nerve grafting, and neurotization have all been used in the treatment of axillary nerve injuries. The choice of treatment is ultimately determined at surgery after exploration of the nerve.
Can an axillary nerve be repaired?
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.
Can axillary nerve damage be repaired?
What helps axillary nerve pain?
Your doctor may also prescribe anti-inflammatory medications to combat swelling or inflammation that’s putting pressure on the axillary nerve. If you have severe pain, your doctor might prescribe narcotic medication. In some cases, your doctor may suggest surgery to repair areas around the axillary nerve.
How long does it take for the axillary nerve to heal?
Most axillary nerve injuries associated with shoulder dislocation will improve and demonstrate a good functional recovery. Neurapraxia should demonstrate full recovery by three months and low-grade axonal injuries can expect to be reinnervating by three months with established recovery by six to seven months.
Is the axillary nerve in the quadrangular space?
The case report noted earlier reports of axillary nerves not running through the quadrangular space, but in those cases, it either pierced the subscapularis muscle or split into branches before reaching the quadrangular space, but this woman’s nerve did neither of these things.
Where does the axillary nerve wrap around the humerus?
The posterior cord of the brachial plexus splits inferiorly to the glenohumeral joint giving rise to the axillary nerve which wraps around the surgical neck of the humerus, and the radial nerve which wraps around the humerus anteriorly and descends along its lateral border.
What causes elongation of the axillary nerve over the head?
Adapted from Apaydin et al. Propagated tension due to overstretching of the axillary nerve over the humeral head during shoulder dislocations may cause elongation of the free portion of the axillary nerve and the increased tension may even result in axillary nerve avulsions from the posterior cord of brachial plexus.
Where are the plexus cords located in the axilla?
In the apex of the axilla, the three plexus cords (lateral, medial, and posterior) form the main terminal nerves of the upper extremity (axillary, musculocutaneous, median, ulnar, and radial).