This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
All of the following features can be observed after the injury to axillary nerve, except - 
Select and explain. 
A. Loss of rounded contour of shoulder, B. Loss of sensation along lateral side of upper arm, C. Loss of overhead abduction, D. Atrophy of deltoid muscle
C: Loss of overhead abduction
Answer: C: Loss of overhead abduction 
Explanation: Muscles responsible for abduction of the shoulder joint
-        Supraspinatus- first 15 degrees of abduction
-        Deltoid (Acromial fibers) - it is responsible for abduction from 15 to 90 degrees. It does not take part in overhead abduction.
-        Trapezius and serratus anterior- They are responsible for upward rotation of the glenoid cavity. And thus helps in abduction over 90 degrees.