Paragraph Number

120

The medial posterior section 2422 may include the medial ramp 2419, which may begin at the medial high point 2427 and extend away from the medial high point 2427 anteriorly toward the medial low point 2428. Following the surface topography of the medial ramp 2419, the medial articulation surface 2420 tends to have a gradient from the medial high point 2427 toward the medial low point 2428 near the medial anterior section 2423 and to the medial perimeter 2426. The gradient of the lateral articulation surface 2421 flows to the lateral low point 2431. Therefore, movement down gradients on the medial articulation surface 2420 and lateral articulation surface 2421 may be asymmetric. The lateral articulation surface 2421 may be generally concave toward the lateral low point 2431. The location of the medial low point 2428 may cause the directionality of the gradient from the medial ramp 2419 along the medial articulation surface 2420, which causes an object or a mass to move down the gradient in the direction created by the medial ramp 2419. The medial ramp 2419 and the different heights along the medial perimeter 2426 and the medial articulation surface 2420 may create a medial dwell point 2435 that is transient along the gradient. The approximate gradient is represented by dashed lines in FIG. 24F.

Added by DJM 1 2022