Method for monitoring performance of back muscles

• US 5,163,440 A
• Filed: 05/30/1990
• Issued: 11/17/1992
• Est. Priority Date: 05/30/1990
• Status: Expired due to Term

• Current Assignee: Trustees of Boston University
• Original Assignee: Trustees of Boston University
• Inventors: DeLuca, Carlo J., Roy, Serge H.
• Primary Examiner(s): Howell, Kyle L.
• Assistant Examiner(s): PONTIUS, KEVIN LANE
• Application Number:
  US07/530,344
• Time in Patent Office: 902 Days
• Field of Search: 128/733, 128/774, 128/781, 128/905
• US Class Current: 600/546
• CPC Class Codes: A61B 5/224 Measuring muscular strength
• CPC Class Codes: A61B 5/389 Electromyography [EMG]
• CPC Class Codes: G16H 10/60 for patient-specific data, e.g. for electronic patient records
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: Y10S 128/905 Feedback to patient of biological signal other than brain electric signal

Abstract

A method for analyzing muscle function including the steps of: (a) locating in a human control subject a predetermined muscle group activatable to produce a given torque; (b) fixing over each of a plurality of individual muscles in the group an electrode adapted to detect myoelectric signals generated therein; (c) activating of the muscles to generate myoelectric signals therein; (d) processing the myoelectric signals to determine a plurality of predetermined values thereof; (e) repeating steps (a), (b), (c) and (d) for each of a plurality of other control subjects; (f) determining a normative range of the predetermined values determined in steps (d) and (e); (g) repeating steps (a), (b), (c) and (d) for a human test subject; and (h) comparing the predetermined values determined in step (g) with the normative range determined in step (f). Dysfunction in the muscle group of the test subject can be determined by comparison of the processed myoelectric signal values.

Claims

1. A method for analyzing muscle function comprising the steps of:

(a) locating in a human control subject a predetermined muscle group activatable to produce a given torque, said muscle group including bilaterally distributed right and left muscles disposed on opposite sides of a saggital plane and cooperatively activated to control position of a given body joint;

(b) fixing over each of said bilaterally distributed right and left muscles an electrode adapted to detect myoelectric signals generated therein;

(c) activating simultaneously said muscles to generate myoelectric signals therein while immobilizing the body portion retaining said muscle group;

(d) processing said myoelectric signals to determine a plurality of predetermined values thereof, said predetermined values comprising predetermined right values associated with said right muscles and predetermined left values associated with said left muscles;

(e) repeating steps (a), (b), (c) and (d) for each of a plurality of other control subjects;

(f) determining a normative range of said predetermined values determined in steps (d) and (e);

(g) repeating steps (a), (b), (c) and (d) for a human test subject; and

(h) comparing said predetermined values determined in step (g) with said normative range determined in step (f) to identify thereby dysfunction in said muscle group of said test subject.

2. A method according to claim 1 wherein step (c) comprises producing fatigue of said muscles by causing contraction thereof during a predetermined time period.

3. A method for analyzing muscle function according to claim 2 including the step of deactivating said muscles after step (c) for a given time period, and wherein said plurality of predetermined values include values determined during both said predetermined and said given time periods.

4. A method for analyzing muscle function according to claim 3 wherein said step (d) comprises determining spectral parameters of said signals.

5. A method for analyzing muscle function according to claim 3 including the step of comparing said predetermined values determined in step (g) for said test subject.

6. A method for analyzing muscle function according to claim 3 wherein said step (d) comprises determining RMS values of said signals.

7. A method for analyzing muscle function according to claim 6 including the step of recording said RMS values versus time during said predetermined and given time periods.

8. A method for analyzing muscle function according to claim 1 including the step of comparing said predetermined right values with said predetermined left values.

9. A method according to claim 8 wherein step (c) producing fatigue of said muscles by causing contraction thereof during a predetermined time period.

10. A method for analyzing muscle function according to claim 9 including the step of deactivating said muscles after step (c) for a given time period, and wherein said plurality of predetermined values include values determined during both said predetermined and said given time periods.

11. A method for analyzing muscle function according to claim 10 wherein said step (d) comprises determining spectral parameters of said signals.

12. A method for analyzing muscle function according to claim 10 wherein said step (d) comprises determining RMS values of said signals.

13. A method for analyzing muscle function according to claim 12 including the step of recording said RMS values versus time during said predetermined and given time periods.