Figure 3a. (a) Schematic of the TMJ in a closed mouth position and sagittal projection and (b) sagittal thin section of a closed jaw. 1, Mandibular head; 2, articular eminence; 3, disk (3a, anterior band; 3b, intermediate zone; 3c, posterior band); 4, bilaminar zone; 5, lateral pterygoid muscle with interposed fat tissue (yellow in schematic) (5a, superior head; 5b, inferior head); 6, superior joint space; 7, inferior joint space.