Axillary nerve dysfunction is nerve damage that leads to a loss of movement or sensation in the shoulder.
Neuropathy - axillary nerve
Causes, incidence, and risk factors
Axillary nerve dysfunction is a form of
peripheral neuropathy. It occurs when there is damage to the axillary nerve, which supplies the deltoid muscles of the shoulder and the skin around it. A problem with just one nerve, such as the axillary nerve, is called mononeuropathy.
The usual causes are:
- Direct trauma
- Long-term pressure on the nerve
- Pressure on the nerve from nearby body structures
- Shoulder injury
Entrapment creates pressure on the nerve where it passes through a narrow structure.
The damage may destroy the myelin sheath that covers the nerve, or part of the nerve cell (the axon). Damage of either type reduces or prevents the movement of impulses through the nerve.
Conditions that can lead to axillary nerve dysfunction include:
- Body-wide (systemic) disorders that cause nerve inflammation
- Deep infection
Fractureof the upper arm bone (humerus)
- Pressure from casts or
- Improper use of crutches
- Shoulder dislocation
In some cases, no cause can be found.
Damaged axillary nerve