Question

Acromioclavicular joint is an example of   ___________

(a) Ball and Socket Joint

(b) Hinge Joint

(c) Plain Joint

(d) Pivot Joint

This question was posed to me during an interview for a job.

Enquiry is from Classification of Joints in section Orthopaedics of Clinical Science

Answer 1

Right answer is (c) Plain Joint

The explanation is: Acromioclavicular joint is the joint of the shoulder blades (scapula) and the shoulder bone (clavicle). This bone provides the sturdiness to the arm and thus can only perform the sliding action. Thus, the joint is called a plain joint.