What characterizes the articular disk in the temporomandibular joint?

The articular disk in the temporomandibular joint (TMJ) is primarily characterized by being devoid of nerves or blood vessels. This absence of innervation and vascular supply is significant because it allows the disk to serve as a cushion and facilitate smooth movement between the bones of the joint without the discomfort that might arise from sensitivity.

The avascular nature of the articular disk means that it relies on the synovial fluid for nutrient exchange and healing. This is important in understanding how the TMJ functions and how it responds to injury or degeneration. The lack of nerves also means that direct pain transmission from the disk itself is minimal, which can influence the clinical presentation of TMJ disorders.

In contrast, other options are less accurate in describing the characteristics of the articular disk. While the disk does possess a certain degree of structural integrity, it is not primarily composed of elastic tissue, nor does it have a rich blood supply or a high number of nerves. Understanding these anatomical and physiological properties can guide clinical practice in diagnosing and treating TMJ-related issues.