Lesson
Joints
Open Chain Movement distal segment of joint moves in space
Closed Chain Movement distal segment of joint fixed in space place where two bones meet & movement takes place
Close Pack Position – max congruency of joint surfaces, max. tautness of joint capsule & ligaments; based on joint orientation which permits maximum contact between articulating bone surfaces
Open Pack Position least congruency of joint surfaces, most loose joint capsule & ligaments; based on joint orientation other than close-packed position
ROM = Range of Motion:
ACTIVE (voluntary) or PASSIVE (through external means)
HYPERMOBILE (excessive ROM) or HYPOMOBILE (restricted ROM)