All of the following features can be observed after the injury to axillary nerve, except -
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- Loss of rounded contour of shoulder
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- Loss of sensation along lateral side of upper arm
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- Loss of overhead abduction
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- Atrophy of deltoid muscle
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Muscles responsible for abduction of the shoulder joint
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Supraspinatus- first 15 degrees of abduction
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Deltoid (Acromial fibers) - it is responsible for abduction from 15 to 90 degrees. It does not take part in overhead abduction.
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Trapezius and serratus anterior- They are responsible for upward rotation of the glenoid cavity. And thus helps in abduction over 90 degrees.