Articular disc of TMJ is

 # Articular disc of TMJ is:

A. Fibrocartilaginous

B. Bony

C. Hyaline cartilage

D. Elastic cartilage

The correct answer is A. Fibrocartilaginous

The unique feature of the TMJ is the articular disc. The disc is composed of fibrocartilaginous tissue which is positioned between the two bones that form the joint. There is neither innervation nor vascularization within the central portion of the articular disc. Articular disc is oval fibrous plate with concavoconvex superior surface and concave inferior surface. It divides joint into upper and lower compartments. Upper compartment permits gliding and lower permits gliding as well as rotatory movements. 

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