All the following can lead to damage of the axillary nerve except:
(A) Fracture of surgical neck of humerus (B) Intramuscular injection (C) Improper use of crutches (D) Shoulder dislocation
(C) Ans: C. Improper use of crutches(Ref Apley's* 9/c p282)Improper use of crutches causes radial nerve palsy mostly rather than axillaty nerve injury.Radial Nerve Injury:Very high lesions may be caused by trauma or operations around the shoulder.Due to chronic compression in the axilla.Seen in drink & drug addicts who fall into a stupor with the arm dangling over the back of a chair - Saturday night palsy.In thin elderly patients using crutches - Crutch palsy.Weakness of wrist & hand.Paralysed triceps.Absent triceps reflex.