Abstract: An apparatus for the discrimination of myoelectric potential patterns, which operates with a procedure comprising the steps of discriminantly screening instruction signals from myoelectric potential signals issuing from the subject's body, performing arithmetic operations of the linear-discriminant functions on the instruction signals against the gravity coefficients fixed in advance based on the data of average myoelectric potential patterns from the modes of motions involved, and classifying the signal of the largest value selected from the results of said arithmetic operations with respect to the prescribed mode of motion.

Abstract: An apparatus for use in a system for transmitting information in the form of electric stimuli to a subject through the medium of a multiplicity of electrodes attached to the subject, which apparatus comprises analogue switches provided one each for the electrodes at their respective input sides and a decoder adapted to effect the "ON-OFF" control of these analogue switches. The pulse signals generated by a stimulator to represent a given piece of information are transmitted to the analogue switches, and then the pulse signals are applied to the subject only through the electrodes which are in their "ON" state at the time of the reception of the signals, giving required electric stimuli to the subject.

Abstract: In the transmission of information through the medium of electrocutaneous stimuli, the data is generally transmitted by issuing signals in the form of pulse trains which carry the information in terms of their frequency of repetition, the duration time of the train of pulses, the pulse height and the pulse width. Different pulse signals, on conveyance to the organism, generate thereon one and the same magnitude of sensation when the products of pulse widths multiplied by the squares of respective pulse heights are equal.