Method and apparatus for neurophysiologic performance

• US 7,349,739 B2
• Filed: 05/05/2003
• Issued: 03/25/2008
• Est. Priority Date: 05/03/2002
• Status: Active Grant

• Current Assignee: Trustees of Boston University
• Original Assignee: Afferent Corporation
• Inventors: Ahlgrim, Dirk, Draudt, Gregg R, Harry, Jason D, Niemi, James B, Collins, James J., Kleshinski, Stephen J
• Primary Examiner(s): Sykes; Angela D
• Assistant Examiner(s): ALTER, ALYSSA MARGO
• Application Number:
  US10/429,252
• Publication Number:
  US 20040073271A1
• Time in Patent Office: 1,786 Days
• Field of Search: 607/2, 607/48, 607/49, 607/50, 607/46
• US Class Current: 607/49
• CPC Class Codes: A61N 1/0452 Specially adapted for transcutaneous muscle stimulation [TMS]
• CPC Class Codes: A61N 1/0456 Specially adapted for transcutaneous electrical nerve stimulation [TENS]
• CPC Class Codes: A61N 1/0472 Structure-related aspects
• CPC Class Codes: A61N 1/0476 Array electrodes (including any electrode arrangement with more than one electrode for at least one of the polarities)
• CPC Class Codes: A61N 1/0484 Garment electrodes worn by the patient
• CPC Class Codes: A61N 1/0492 Patch electrodes A61N1/0412, A61N1/0428 take precedence
• CPC Class Codes: A61N 1/0551 Spinal or peripheral nerve electrodes
• CPC Class Codes: A61N 1/32 alternating or intermittent currents applying electric fields by inductive or capacitive coupling A61N1/40; microwave apparatus A61N5/02
• CPC Class Codes: A61N 1/3603 Control systems

Abstract

The invention features methods and apparatus for enhancing neurophysiologic performance, such as sensorimotor control and neuroplasticity. A preferred method involves inputting bias signals to sensory cells of a subject, thereby improving sensory cell function, while the subject is performing a predefined physical activity. A system used to practice the method of the invention includes a wearable device to which is secured at least one repositionable signal input device and a signal generator that is communicatively coupled to the signal input devices.

Claims

1. A method of enhancing sensorimotor performance in a subject comprising the steps of:

inputting at least one bias signal to at least one sensory cell area of said subject;

moving at least one body segment of said subject relative to another simultaneous with said inputting at least one bias signal to at least one sensory cell area of said subject, wherein said at least one body segment utilizes sensory cells within said sensory cell area that is involved in the sensorimotor performance to be enhanced; and

inducing neuroplastic changes in the nervous system of said subject by inputting said at least one bias signal for a period of time long enough that said subject'"'"'s sensorimotor performance is enhanced.

2. The method of claim 1, wherein said sensorimotor performance to be enhanced is joint stability, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s joint stability.

3. The method of claim 1, wherein said sensorimotor performance to be enhanced is gait, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s gait.

4. The method of claim 1, wherein said sensorimotor performance to be enhanced is balance, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s standing balance.

5. The method of claim 1, wherein said sensorimotor performance to be enhanced is motor learning, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s motor learning.

6. The method of claim 1, wherein said sensorimotor performance to be enhanced is motor skill, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s motor skill.

7. The method of claim 1, wherein said neuroplastic changes are neuroplastic changes in the central nervous system.

8. The method of claim 1, wherein said neuroplastic changes are neuroplastic changes in the peripheral nervous system.

9. The method of claim 1, further comprising the step of modulating said bias signal in synchrony with said moving of at least one body segment.

10. The method of claim 1, further comprising the steps of:

measuring a physical variable from at least one body segment of said subject during said moving of said at least one body segment pre-defined physical activity, wherein said physical variable is selected from the group consisting of force, pressure, position, angle, velocity, and acceleration; and

modulating said bias signal in response to at least one of said physical variables.

11. The method of claim 1, wherein said bias signal is a mechanical signal having a displacement of about 1 μ

m to about 10 mm.

12. The method of claim 1, wherein said bias signal is a mechanical signal composed of one or more frequencies within the range of about 0 Hz to about 1000 Hz.

13. The method of claim 1, wherein said bias signal is a electrical signal having a current density in the range of about 1 μ

A/in² to about 1000 μ

A/in².

14. The method of claim 1, wherein said bias signal is an electrical signal composed of one or more frequencies within the range of about 0 Hz to about 10,000 Hz.

78. The method of claim 1, further comprising the step of measuring said neuroplastic changes.

79. The method of claim 1, wherein said moving is performed voluntarily by said subject.

80. The method of claim 1, wherein said moving is performed by another.

81. The method of claim 1, wherein said moving is performed by a machine.

82. The method of claim 1, wherein said moving is conducted as part of a physical training regimen.

83. The method of claim 82, wherein said physical training is a prescribed physical training regimen.

84. The method of claim 1, wherein said body segment is a skeletal body segment.

94. The method of claim 1, wherein said sensorimotor performance to be enhanced is reaching, and inputting the at least one bias signal to at least one sensory cell area that is involved in reaching.

95. The method of claim 1, wherein said sensorimotor performance to be enhanced is gasping, and inputting the at least one bias signal to at least one sensory cell area that is involved in grasping.

15. A method of enhancing sensorimotor performance in a subject comprising the step of:

generating at least one bias signal using a system for enhancing sensorimotor performance, said system comprising a wearable device to which at least one signal input device is repositionably secured, and a signal generator communicatively coupled to said at least one signal input device for generating said bias signal;

inputting at least one bias signal to at least one sensory cell area of said subject;

moving at least one body segment of said subject relative to another simultaneous with said inputting at least one bias signal to at least one sensory cell area of said subject, wherein said at least one body segment utilizes sensory cells within said sensory cell area that is involved in the sensorimotor performance to be enhanced;

inducing neuroplastic changes in the nervous system of said subject by inputting said at least one bias signal for a period of time long enough that said subject'"'"'s sensorimotor performance is enhanced.

16. The method of claim 15, wherein said sensorimotor performance to be enhanced is joint stability, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s joint stability.

17. The method of claim 15, wherein said sensorimotor performance to be enhanced is gait, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s gait.

18. The method of claim 15, wherein said sensorimotor performance to be enhanced is standing balance, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s standing balance.

19. The method of claim 15, wherein said sensorimotor performance to be enhanced is motor learning, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s motor learning.

20. The method of claim 15, wherein said sensorimotor performance to be enhanced is motor skill, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s motor skill.

21. The method of claim 15, wherein said neuroplastic changes are neuroplastic changes in the central nervous system.

22. The method of claim 15, wherein said neuroplastic changes are neuroplastic changes in the peripheral nervous system.

23. The method of claim 15, further comprising the step of modulating said bias signal in synchrony with said moving of at least one body segment.

24. The method of claim 15, further comprising the steps of:

measuring a physical variable from at least one body segment of said subject during said moving of at least one body segment, wherein said physical variable is selected from the group consisting of force, pressure, position, angle, velocity, and acceleration; and

modulating said bias signal in response to said physical variable.

25. The method of claim 15, wherein said bias signal is a mechanical signal having a displacement of about 1 μ

m to about 10 mm.

26. The method of claim 15, wherein said bias signal is a mechanical signal composed of one or more frequencies within the range of about 0 Hz to about 1000 Hz.

27. The method of claim 15, wherein said bias signal is an electrical signal having a current density in the range of about 1 μ

A/in² to about 1000 μ

A/in².

28. The method of claim 15, wherein said bias signal is an electrical signal composed of one or more frequencies within the range of about 0 Hz to about 10,000 Hz.

85. The method of claim 15, further comprising the step of measuring said neuroplastic changes.

86. The method of claim 15, wherein said moving is performed voluntarily by said subject.

87. The method of claim 15, wherein said moving is performed by another.

88. The method of claim 15, wherein said moving is performed by a machine.

89. The method of claim 15, wherein said moving is conducted as part of a physical training regimen.

90. The method of claim 89, wherein said physical training is a prescribed physical training regimen.

91. The method of claim 15, wherein said body segment is a skeletal body segment.

92. The method of claim 15, wherein said sensorimotor performance to be enhanced is reaching, and inputting the at least one bias signal to at least one sensory cell area that is involved in reaching.

93. The method of claim 15, wherein said sensorimotor performance is grasping, and inputting the at least one bias signal to at least one sensory cell area that is involved in grasping.

29. A method of improving neurological function in a subject comprising the step of:

inputting at least one bias signal to at least one sensory cell area of a subject;

moving at least one body segment of said subject relative to another simultaneous with said inputting at least one bias signal to at least one sensory cell area of said subject, wherein said at least one body segment utilizes sensory cells within said sensory cell area that is involved in the sensorimotor performance to be enhanced;

inducing neuroplastic changes in the nervous system of said subject by inputting said at least one bias signal for a period of time long enough that said subject'"'"'s sensorimotor performance is enhanced.

31. The method of claim 29, wherein said neurological function is sensorimotor performance.

32. The method of claim 31, wherein said sensorimotor performance to be enhanced is joint stability, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s joint stability.

33. The method of claim 31, wherein said sensorimotor performance to be enhanced is gait, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s gait.

34. The method of claim 31, wherein said sensorimotor performance to be enhanced is standing balance, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s standing balance.

35. The method of claim 31, wherein said sensorimotor performance to be enhanced is motor learning, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s motor learning.

36. The method of claim 31, wherein said sensorimotor performance to be enhanced is motor skill, and inputting the at least one bias signal to at least one sensory cell area that is involved with the subject'"'"'s motor skill.

37. The method of claim 29, wherein said neurological changes are in the central nervous system.

38. The method of claim 29, further comprising the step of measuring said neuroplastic changes.

39. The method of claim 29, wherein said moving is performed voluntarily by said subject.

40. The method of claim 29, wherein said moving is performed by another.

41. The method of claim 29, wherein said moving is performed by a machine.

42. The method of claim 29, wherein said moving is conducted as part of a physical training regimen.

43. The method of claim 42, wherein said physical training is a prescribed physical training regimen.

44. The method of claim 29, wherein said body segment is a skeletal body segment.

96. The method of claim 29, wherein said sensorimotor performance to be enhanced is reaching, and inputting the at least one bias signal to at least one sensory cell area that is involved in reaching.

97. The method of claim 29, wherein said sensorimotor performance is grasping, and inputting the at least one bias signal to at least one sensory cell area that is involved in grasping.

30. A method of improving neurological function in a subject comprising the step of:

generating at least one bias signal using a system for enhancing neurological function, said system comprising a wearable device to which at least one signal input device is repositionably secured, and a signal generator communicatively coupled to said at least one signal input device for generating said bias signal;

inputting at least one bias signal to at least one sensory cell area of said subject;

moving at least one body segment of said subject relative to another simultaneous with said inputting at least one bias signal to at least one sensory cell area of said subject, wherein said at least one body segment utilizes sensory cells within said sensory cell area that is involved in the sensorimotor performance to be enhanced;

inducing neuroplastic changes in the nervous system of said subject by inputting said at least one bias signal for a period of time long enough that said subject'"'"'s sensorimotor performance is enhanced.

45. The method of claim 30, wherein said improved neurological function is sensorimotor performance.

46. The method of claim 45, wherein said sensorimotor performance to be improved is joint stability, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s joint stability.

47. The method of claim 45, wherein said sensorimotor performance to be enhanced is gait, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s gait.

48. The method of claim 45, wherein said sensorimotor performance to be enhanced is standing balance, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s standing balance.

49. The method of claim 45, wherein said sensorimotor performance to be enhanced is motor learning, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s motor learning.

50. The method of claim 45, wherein said sensorimotor performance to be enhanced is motor skill, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s motor skill.

51. The method of claim 30, wherein said neurological changes are in the central nervous system.

52. The method of claim 30, wherein said neurological changes are in the peripheral nervous system.

53. The method of claim 30, further comprising the step of measuring said neuroplastic changes.

54. The method of claim 30, wherein said moving is performed voluntarily by said subject.

55. The method of claim 30, wherein said moving is performed by another.

56. The method of claim 30, wherein said moving is performed by a machine.

57. The method of claim 30, wherein said moving is conducted as part of a physical training regimen.

58. The method of claim 57, wherein said physical training is a prescribed physical training regimen.

59. The method of claim 30, wherein said body segment is a skeletal body segment.

98. The method of claim 30, wherein said sensorimotor performance to be enhanced reaching, and inputting the at least one bias signal to at least one sensory cell area that is involved in reaching.

99. The method of claim 30, wherein said sensorimotor performance is grasping, and inputting the at least one bias signal to at least one sensory cell area that is involved in grasping.

60. A method of enhancing sensorimotor performance comprising the steps of:

instructing a subject to move at least one body segment which utilizes sensory cells within at least one sensory cell area that is involved in the sensorimotor performance to be enhanced;

inputting at least one bias signal to at least one sensory cell area of a subject simultaneous with the subject moving at least one body segment;

inducing neuroplastic changes in the nervous system of said subject by inputting said bias signal for a time period long enough to enhance said subject'"'"'s sensorimotor performance.

61. The method of claim 60, wherein said sensorimotor performance to be enhanced is joint stability, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s joint stability.

62. The method of claim 60, wherein said sensorimotor performance to be enhanced is gait, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s gait.

63. The method of claim 60, wherein said sensorimotor performance to be enhanced is standing balance, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s standing balance.

64. The method of claim 60, wherein said sensorimotor performance to be enhanced is motor learning, and inputting the at least one bias signal to at least one sensory cell that is involved in the subject'"'"'s motor learning.

65. The method of claim 60, wherein said sensorimotor performance to be enhanced is motor skill, and inputting the at least one bias signal to at least one sensory cell area that is involved in the subject'"'"'s motor skill.

66. The method of claim 60, wherein said neuroplastic changes are neuroplastic changes in the central nervous system.

67. The method of claim 60, wherein said neuroplastic changes are neuroplastic changes in the peripheral nervous system.

68. The method of claim 60, further comprising the step of modulating said bias signal in synchrony with said moving of at least one body segment.

69. The method of claim 60, further comprising the steps of:

measuring a physical variable from at least one body segment of said subject during said moving of said at least one body segment wherein said physical variable is selected from the group consisting of force, pressure, position, angle, velocity, and acceleration; and

modulating said bias signal in response to at least one of said physical variables.

70. The method of claim 60, wherein said bias signal is a mechanical signal having a displacement of about 1 μ

m to about 10 mm.

71. The method of claim 60, wherein said bias signal is a mechanical signal composed of one or more frequencies within the range of about 0 Hz to about 1000 Hz.

72. The method of claim 60, wherein said bias signal is an electrical signal having a current density in the range of about 1 μ

A/in² to about 1000 μ

A/in².

73. The method of claim 60, wherein said bias signal is an electrical signal composed of one or more frequencies within the range of about 0 Hz to about 10,000 Hz.

74. The method of claim 60, further comprising the step of measuring said neuroplastic changes.

75. The method of claim 60, wherein said moving is conducted as part of a physical training regimen.

76. The method of claim 75, wherein said physical training is a prescribed physical training regimen.

77. The method of claim 60, wherein said body segment is a skeletal body segment.

100. The method of claim 60, wherein said sensorimotor performance to be enhanced reaching, and inputting the at least one bias signal to at least one sensory cell area that is involved in reaching.

101. The method of claim 60, wherein said sensorimotor performance is gasping, and inputting the at least one bias signal to at least one sensory cell area that is involved in grasping.