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Method of monitoring body movements using activity monitoring apparatus

  • US 5,573,013 A
  • Filed: 06/07/1995
  • Issued: 11/12/1996
  • Est. Priority Date: 06/17/1991
  • Status: Expired due to Fees
First Claim
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1. A method of automatically monitoring predetermined body movements of a patient subject over time by isolating said predetermined body movements from general body movements, said method comprising:

  • providing an activity monitor capable of producing an analog electrical signal responsive to body movements of said patient subject, said activity monitor being capable of detecting said predetermined body movements by isolating said predetermined body movements from general body movements by adjusting characteristics of said analog electrical signal to enhance relevant signal information indicative of said predetermined body movements while removing irrelevant signal information indicative of general body movements;

    defining within said activity monitor a mutually orthogonal, three-dimensional coordinate axis system having a sensitivity axis, a frequency axis and an epoch axis previously known to be specific for said predetermined body movements being monitored;

    three-dimensionally tuning said activity monitor by selectively adjusting amplitude and frequency characteristics of said analog electrical signal in order to remove said irrelevant signal information and to enhance said relevant signal information in order to provide an enhanced signal indicative of said predetermined body movements rather than said general body movements;

    affixing said activity monitor onto said patient subject'"'"'s body,recording said analog electrical signal over a monitoring period by processing said enhanced signal by passing said enhanced signal through a converter means for selectively sampling said tuned, enhanced signal with respect to an appropriate predetermined real time epoch selected according to the type of predetermined body movements being monitored to obtain resultant data signals, if any, which fall within regions defined in said, three-dimensional coordinate axis system which signals are indicative of said predetermined body movements and not of general body movements.

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