Method for balancing assistance

• US 4,760,850 A
• Filed: 05/15/1986
• Issued: 08/02/1988
• Est. Priority Date: 05/15/1986
• Status: Expired due to Fees

• Current Assignee: Wright State University 3640 Colonel Glenn Highway A State University of Oh
• Original Assignee: Wright State University
• Inventors: Petrofsky, Jerrold S., Phillips, Chandler A.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): Shay, David
• Application Number:
  US06/863,744
• Time in Patent Office: 810 Days
• Field of Search: 128/423 W, 128/782, 128/779, 128/774, 340/666, 340/667, 340/407
• US Class Current: 607/49
• CPC Class Codes: A61B 5/1036 Measuring load distribution, e.g. podologic studies
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61F 2/70 electrical
• CPC Class Codes: A61F 5/0102 specially adapted for correcting deformities of the limbs or for supporting them; Ortheses, e.g. with articulations
• CPC Class Codes: A61N 1/36003 of motor muscles, e.g. for walking assistance

Abstract

Method for assisting in the maintenance of a balanced stance by a person who has lost the sense of touch in one or both feet. Load signals are generated in correspondence with body weight loads applied at forward and rearward portions of the feet. The load signals are used for creation of tactile stimuli in a spaced pattern on a sensitive skin area of the person.

Claims

1. Method of assisting a spinal-cord-injured person to maintain a balanced stance comprising the steps of:

securing braces to both legs of said person,

generating four balance signals corresponding to the loads created by the weight of said person at forward and rearward portions of both feet,

applying tactile stimuli corresponding to said balance signals in a spaced pattern on a sensitive skin area of said person for enabling said person to maintain a balanced stance.

2. Method according to claim 1 wherein the step of applying includes applying said tactile stimuli at the corners of a square having sides approximately four inches long.

3. Method according to claim 2 wherein said stimuli are vibrational stimuli.

4. Method according to claim 1 wherein said balance signals includes the step of causing signals to oscillate at fixed frequencies in a range between about 5 Hz and 500 Hz and have peak amplitudes which vary in correspondence with variations in said loads;

said tactile stimuli being generated by causing vibration of mechanical receptor elements in correspondence with variations in said balance signals.

5. Method according to claim 4 and comprising the further step of causing all of said stimuli to have relatively low and comfortable reference levels when said person has achieved a balanced stance.

6. Method according to claim 4 and comprising the further step of causing said stimuli to discontinue when their corresponding loads are reduced to zero.