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
[{'content': 'All of the following features can be observed after the injury to axillary nerve, except - \nSelect and explain. \nA. 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', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Muscles responsible for abduction of the shoulder joint\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0Supraspinatus- first 15 degrees of abduction\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0Deltoid (Acromial fibers) - it is responsible for abduction from 15 to 90 degrees. It does not take part in overhead abduction.\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0Trapezius and serratus anterior- They are responsible for upward rotation of the glenoid cavity. And thus helps in abduction over 90 degrees.', 'role': 'assistant'}]