All of the following features can be observed after the injury to axillary nerve, EXCEPT?
Axillary nerve originates from the posterior cord of brachial plexus C5,6. It supplies deltoid and teres minor muscles, shoulder joint and a patch of skin in the so called regimental badge area of the arm. Deltoid helps in abduction of the arm above 15 degree, Teres minor helps in the lateral rotation of the arm at the glenohumeral joint. Most common cause of axillary nerve injury is traction on the nerve during an anterior shoulder dislocation or during surgery in the shoulder joint region. Axillary nerve damage result in atrophy of deltoid muscle resulting in loss of rounded contour of the shoulder, inability to abduct arm above 15 degree and loss of sensation along lateral side of upper arm.
Atrophy of deltoid muscle
Loss of overhead abduction
Loss of rounded contour of shoulder
Loss of sensation along lateral side of upper arm