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Functional electrical stimulation system

  • US 7,162,305 B2
  • Filed: 10/23/2002
  • Issued: 01/09/2007
  • Est. Priority Date: 10/23/2002
  • Status: Active Grant
First Claim
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1. An electrical stimulation device for aiding movement of a partials paralysed body part, comprising:

  • an orthotic for wearing on a body part of a person,a first sensor on the orthotic for detecting a first movement of the body part and if a first movement of the body part is detected producing a sensor signal,a second sensor on the orthotic for detecting a second movement of the body part and if a second movement of the body part is detected producing a second sensor signal.a plurality of electrodes on the orthotic for contacting the skin surface over muscles used to move the body part, the electrodes separated into two groups,and a controller in electrical communication with the sensors and electrodes for receiving the first sensor signal and comparing it to a first threshold value, receiving the second sensor signal and comparing it to a second threshold value, and generating an electrical output from a first group of electrodes if the first sensor signal exceeds the first threshold value, or generating the an electrical output from a second group of electrodes if the first sensor signal exceeds the first threshold value and the second sensor signal exceeds the second threshold value, wherein the body part is an upper limb the first movement is extension of the wrist the second movement is rotation of the wrist and the muscles are thumb abductor, thenar, wrist extensor, and wrist flexor muscles.

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