Abstract: Spine motion analyzer and method in which a self-aligning measurement linkage is attached to the subject above and below the portion of the spine in which motion is to be monitored. Mounts are provided for attaching the ends of the linkage in fixed positions near the sacrum, beneath the scapulae, and on the head for monitoring either lumbar motion or cervical motion. The linkage has a plurality of arms which move relative to each other in accordance with movement of the spine between the points to which the linkage is attached, and transducers connected to the linkage arms provide electrical signals which can be processed to provide video, printed and/or auditory indications of the spinal movements. One embodiment, which is particularly adapted for sports testing such as golf swing analysis includes a transducer such as a gyroscope which permits measurements to be taken with respect to an absolute or fixed reference such as the ground.

Abstract: An improved dynamic sagittal knee test apparatus having a skeletal frame structure with a thigh portion attachable to a patient's thigh, a shin portion attachable to a patient's shin and an interconnecting spanning linkage portion connecting the thigh portion to the shin portion, the interconnecting linkage assembly having three axial transducers for measuring arcuate displacements on three primary perpendicular axes for measuring leg flexion, varus-valgus angular displacement, and axial rotation of the tibia relative to the femur, the three transducers being arranged to take measurements without reconfiguration of linkage in the spanning link portion of the test apparatus, the apparatus including a patella assembly with an additional transducer for measuring anterior-posterior displacements of the tibia relative to the femur.

Abstract: Apparatus for electronically measuring ligamentous insufficiencies in the knee, the apparatus constructed in an exoskeletal articulating framework that is secured above the knee to the patient's femur and below the knee to the tibia and has substantially skeletal conforming articulating joint members with measuring means for determining the relative motions of tibia to femur.

Abstract: Apparatus for measuring ligamentous insufficiency in the knee, the apparatus including a leg support having an adjustment mechanism for disposing the legs at a select test angle and having straps securing the ankles and the thighs to the leg support; an instrument bridge having mounting supports for mounting the bridge to the tibia, the bridge having at one end an indicator with a patella contact for measuring displacements of the patella and femur relative to the tibia; and a push-pull force applicator for applying posterior and anterior forces to the lower leg to induce sagittal excursions.

Abstract: An adjustable prosthetic ankle assembly for allowing the heel height of a prosthetic foot to be adjusted and secured in a position that is of optimum comfort and facility to the user, the ankle assembly has a mechanism interposed between an ankle block and a connected foot block with a pivot and associated adjustment screw for altering the fore and aft tilt of the foot block with respect to the ankle block.