What describes the inferior portion of the posterior bilaminar retrodiscal pad of the articular disc?

The inferior portion of the posterior bilaminar retrodiscal pad of the articular disc is described as inelastic due to its structure and composition. This part of the retrodiscal pad is primarily composed of dense connective tissue that lacks the elasticity found in other tissues. Unlike more elastic tissues, the inelastic nature of this area provides stability and support to the temporomandibular joint (TMJ) while still allowing for some movement necessary for function.

Elastic tissues generally allow for expansion and rebound, which is not characteristic of the inferior portion of the posterior bilaminar pad. Vascular and avascular attributes pertain to the presence or absence of blood vessels, but the focus here is on the mechanical properties and behavior of the tissue during joint movement. The inelastic quality is crucial in maintaining the integrity and function of the TMJ under compressive forces.