Archives of Physical Medicine and Rehabilitation
Volume 90, Issue 9 , Pages 1619-1627 , September 2009

Lowering of Sensory, Motor, and Pain-Tolerance Thresholds With Burst Duration Using Kilohertz-Frequency Alternating Current Electric Stimulation: Part II

  • Alex R. Ward, PhD

      Affiliations

    • Corresponding Author InformationReprint requests to Alex R. Ward, PhD, School of Human Biosciences, Faculty of Health Sciences, La Trobe University, Victoria, 3086, Australia
    • ,
  • Wendy Lee Hung Chuen, BSc(Hons)

  • Image Result

    Stimulus types commonly used in rehabilitation. (A) Biphasic pulsed current. (B) Monophasic pulsed current. (C) Bursts of AC with a duty cycle of 50%. (D) Bursts of AC typical of interferential curren

    Stimulus types commonly used in rehabilitation. (A) Biphasic pulsed current. (B) Monophasic pulsed current. (C) Bursts of AC with a duty cycle of 50%. (D) Bursts of AC typical of interferential current.

  • Image Result
    Sensory threshold versus burst duration at: (A) 1kHz and (B) 4kHz; (C) 1-kHz and (D) 4-kHz motor thresholds; (E) 1-kHz and (F) 4-kHz pain-tolerance thresholds. (⧫) are values in volts (V), measured at

    Sensory threshold versus burst duration at: (A) 1kHz and (B) 4kHz; (C) 1-kHz and (D) 4-kHz motor thresholds; (E) 1-kHz and (F) 4-kHz pain-tolerance thresholds. (⧫) are values in volts (V), measured at a burst frequency of 20Hz, and (⊡) are values at 50Hz previously reported by Ward and Lucas-Toumbourou.19

  • Image Result
    Relative thresholds at different burst durations with burst frequencies of 50Hz (⊡) and 20Hz (⧫). (A) Pain/motor thresholds using bursts of 1-kHz AC. (B) Pain/motor thresholds using bursts of 4-kHz AC

    Relative thresholds at different burst durations with burst frequencies of 50Hz (⊡) and 20Hz (⧫). (A) Pain/motor thresholds using bursts of 1-kHz AC. (B) Pain/motor thresholds using bursts of 4-kHz AC. 50-Hz relative thresholds were previously reported by Ward and Lucas-Toumbourou.19

  • Image Result
    Relative thresholds at different burst durations with burst frequencies of 50Hz (⊡) and 20Hz (⧫). (A) Pain/sensory thresholds using bursts of 1-kHz AC. (B) Pain/sensory thresholds using bursts of 4-kH

    Relative thresholds at different burst durations with burst frequencies of 50Hz (⊡) and 20Hz (⧫). (A) Pain/sensory thresholds using bursts of 1-kHz AC. (B) Pain/sensory thresholds using bursts of 4-kHz AC. 50-Hz relative thresholds were previously reported by Ward and Lucas-Toumbourou.19

 Supported by ongoing research grants from the Faculty of Health Sciences, La Trobe University (grant no. FRG6/A12) and the School of Human Biosciences, La Trobe University (grant no. 100226).

 No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit on the authors or on any organization with which the authors are associated.

PII: S0003-9993(09)00333-5

doi: 10.1016/j.apmr.2009.02.022

Archives of Physical Medicine and Rehabilitation
Volume 90, Issue 9 , Pages 1619-1627 , September 2009

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