Effect of partial wrist denervation on wrist kinesthesia: wrist denervation does not impair proprioception.

Purpose: To evaluate the potential effect of partial wrist denervation on wrist kinesthesia, we hypothesized that anesthetizing the anterior interosseous nerve and the posterior interosseous nerve does not impair the kinesthesia.

Methods: We performed a double-blinded, prospective, randomized study on 80 healthy volunteers (20-54 y old) to compare the ability to detect active and passive wrist movement in 2 conditions. The test group received an anesthetic block of the anterior and posterior interosseous nerves, and the control group subjects received an injection of saline.

New method of measuring wrist joint position sense avoiding cutaneous and visual inputs.

Background: Aspects of afferent inputs, generally termed proprioception, are being increasingly studied. Extraneous factors such as cutaneous inputs can dramatically interfere while trying to design studies in order to determine the participation of the different structures involved in proprioception in the wrist position sense. We tried to determine validity and repeatability of a new wrist joint position measurement device using methodology designed to minimize extraneous factors and isolate muscle and joint inputs.

Foot and ankle kinematics and ground reaction forces during ambulation.

Background: Assessing patients with foot and ankle disorders by observation of gait is dependent on the examiner's experience and cannot provide information about three-dimensional movement, forces, or motion of segments of the foot. Gait analysis models usually consider the foot as a rigid body and study the foot and ankle as a unit. These models are adequate to describe ankle sagittal plane mechanics but are limited in their ability to provide accurate analysis in the other planes or of segments of the foot.

Effects of ankle-foot orthoses on ankle and foot kinematics in patients with subtalar osteoarthritis.

Objective: To determine whether different foot orthoses have a similar effect on foot kinematics in subjects with subtalar osteoarthritis (OA) when walking on various ground conditions.

Design: Within-subject comparison study.

Setting: Biomechanics research laboratory.

Effects of ankle-foot orthoses on ankle and foot kinematics in patient with ankle osteoarthritis.

Objective: To determine if different foot orthoses have a similar effect on foot kinematics in subjects with ankle osteoarthritis (OA) when walking on various ground conditions.

Design: Within-subject comparisons study.

Setting: Biomechanics research laboratory.

The effect of custom-made braces for the ankle and hindfoot on ankle and foot kinematics and ground reaction forces.

Objective: To assess the effects on gait of custom-made polypropylene orthoses: ankle-foot orthosis (AFO), rigid hindfoot orthosis (HFO-R), and articulated hindfoot orthosis (HFO-A).

Design: Experimental assessment.

Setting: Institutional practice, motion analysis laboratory.