Knee Injuries. 1  Patellofemoral Syndrome. Also called Runner's Knee, problems associated with the patella, or kneecap, are common in runners. 2  Kneecap Subluxation. Many kneecap issues are related to the position of the kneecap within the groove on the end of the thigh bone.
A movement toward the midline is called adduction. Adduct means to bring towards the center. The opposite, abduction is moving away from midline. A movement toward the midline is called adduction. Adduct means to bring towards the center. The opposite, abduction is moving away from midline.
midpoint. 1  a point at or near the middle of, or equidistant from, both ends, as of a line: the midpoint of a boundary. 2  a point in time halfway between the beginning and the end, as of a process, event, or situation: the midpoint of the negotiations. Geometry. the point on a line segment or an arc that is equidistant, when measured along the line or the arc, from both endpoints.