Abstract: A device and a method for measuring wrist motion is provided. The device allows for direct determination of wrist position in the radial/ulnar and flexion/extension planes, without needing calibration or determination of the center of rotation of the wrist. The goniometer forearm component is adapted to be releasably affixed to a forearm of a user. A hand component is also provided adapted to be releasably affixed to a hand of the user. The displacement measuring devices include cables adapted to be connected to the hand component. The displacement measuring devices are configured to ultimately measure angular displacement of the hand component relative to the forearm component.

Abstract: A device and a method for measuring wrist motion is provided. The device allows for direct determination of wrist position in the radial/ulnar and flexion/extension planes, without needing calibration or determination of the center of rotation of the wrist. The goniometer comprises a forearm component locating at least three displacement measuring devices. The forearm component is adapted to be releasably affixed to a forearm of a user. A hand component is also provided adapted to be releasably affixed to a hand of the user. The displacement measuring devices include cables adapted to be connected to the hand component. The displacement measuring devices are configured to measure angular displacement of the hand component relative to the forearm component. Two of the cables may be provided adjacent and substantially parallel to each other at substantially the same height above the base of the forearm component.

Abstract: An apparatus for testing a muscle of a patient who is fitted with a myoelectric prosthetic device. The apparatus has an array of electrodes for testing the muscle over a wide area during a short period of time. The electric signals from the contraction are amplified, filtered, and converted to a digital signal. The digital signals are sent to a computer which causes a display to show one or more of the signals. A prosthetist uses the results to determine how to place the electrode in the device.

Abstract: A portable hearing protection device evaluation apparatus which can be taken into the field to measure noise attenuation of a muff type hearing protection device under actual working conditions is provided. The apparatus includes two miniature microphones, one positioned inside a muff near the ear, the other positioned outside the muff to detect the noise in the environment. These two microphones simultaneously receive input signals which are provided to circuitry which determines and displays a single number output representing the noise attenuation.

Abstract: A device and a method for anatomic implantation to provide electrical interface to nerves. Included in the device are a pair of electrical leads secured to a coupling formed from a piece of woven sheet material, and having ends connected to spaced apart input terminals disposed adjacent to an inner surface of the coupling. Connected to the opposite ends of the leads are output terminals for interfacing to electrical recording or measuring instruments. During implantation, a subject nerve is embraced by the inner surface of the sheet material which is shaped for juxtaposition the outer surface of the nerve at a minimum spacing therefrom of 0.3 millimeters. In the period following implantation the interstices of the sheet material coupling receive anatomic tissue growth establishing a structurally stable dimensional relationship between the nerve and both the input electrodes and the coupling.