Patient initiated response method

• US 4,582,049 A
• Filed: 09/12/1983
• Issued: 04/15/1986
• Est. Priority Date: 09/12/1983
• Status: Expired due to Fees

• Current Assignee: Carl J. Ylvisaker
• Original Assignee: Carl J. Ylvisaker
• Inventors: Ylvisaker, Carl J.
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): D'Arrigo, Kathleen
• Application Number:
  US06/531,256
• Time in Patent Office: 946 Days
• Field of Search: 128/24.1, 128/905, 128/422, 128/80 G, 128/421, 128/423, 128/733, 128/419 PG, 623/24, 623/25
• US Class Current: 601/15
• CPC Class Codes: A61B 5/389 Electromyography [EMG]
• CPC Class Codes: A61B 5/395 Details of stimulation, e.g. nerve stimulation to elicit EMG response
• CPC Class Codes: A61N 1/36003 of motor muscles, e.g. for walking assistance

Abstract

A patient-initiated response device and method for re-educating debilitated muscle tissue. The method comprises the detection of an electromyographic signal in a muscle group, which is used to trigger an artificial stimulation signal of a higher pre-determined intensity and transmit such a signal to a debilitated muscle group. The patient-initiated electromyographic signal may be detected in a debilitated or non-debilitated muscle group. The device detects an electromyographic signal of a pre-determined intensity and then generates and transmits an artificial stimulation signal to a muscle group at a frequency and intensity determined by the device operator.

Claims

1. A patient-initiated method of re-educating a debilitated muscle group including the brain control therefor, which muscle group is possessed by the patient, the method comprising repeatedly preforming the steps of

(a) having the patient produce, through voluntary initiation of attempted movement in a limb consciously selected by the patient, an electromyographic signal in a muscle group that is responsible for limb movement,

(b) detecting the electromyographic signal so produced when such has a predetermined intensity,

(c) producing in response to said detected electromyographic signal a stimulation signal of greater intensity, and

(d) essentially simultaneously with detection of the electromyographic signal transmitting the stimulation signal to a debilitated muscle group of the patient responsible for limb movement to produce response to the stimulation signal in the debilitated muscle group perceived by the patient to be response to the voluntarily initiated attempted movement of the limb, repeated perception by the patient of this response serving to re-educate the muscle group including the brain control therefor whereby the patient is enabled to produce limb movement without transmission of the stimulation signal.

2. The method of claim 1, wherein said stimulation signal is transmitted for a transmission time period of predetermined length, and on expiration of the transmission time period there is a shut-down period of non-transmission, said shut-down period having greater length than the length of the transmission period.

3. The method of claim 1, wherein the debilitated muscle group is responsible for limb movement in one limb of the patient, and the patient produced electromyographic signal is produced in a muscle group that is responsible for movement in the same limb.

4. The method of claim 1, wherein the debilitated muscle group is responsible for limb movement in one limb of the patient and the patient produced electromyographic signal is produced in a musele group that is responsible for movement in a symmetric limb on the opposite side of the patient from said one limb.