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Updated: May 25, 2026

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Upper-extremity H-reflex measurement post-stroke: reliability and inter-limb differences.

Chetan P Phadke1, Christopher T Robertson, Elizabeth G Condliffe

  • 1Neural Control of Movement Laboratory - Brain Rehabilitation Research Center of Excellence, Malcom Randall VA Medical Center, Gainesville, FL 32608, USA.

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|January 27, 2012
PubMed
Summary
This summary is machine-generated.

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This study confirms the reliability of flexor carpi radialis (FCR) H-reflex measurements in both stroke survivors and non-disabled individuals. These findings support using FCR H-reflexes to track motor recovery and intervention effects.

Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Motor Control

Background:

  • The flexor carpi radialis (FCR) H-reflex is a valuable tool for assessing neural pathways.
  • Reliability of FCR H-reflex measurements is crucial for tracking motor recovery, especially in stroke patients.
  • Understanding inter-limb and age-related differences can refine neurophysiological assessments.

Purpose of the Study:

  • To determine the test-retest reliability of FCR H-reflexes in non-disabled and stroke populations.
  • To investigate inter-limb differences in H-reflex responses post-stroke.
  • To examine the effects of stroke chronicity and age on H-reflex measurements.

Main Methods:

  • Recruited 16 chronic stroke and 22 non-disabled participants.
  • Recorded bilateral FCR H-reflexes using surface electromyography over two days.

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Last Updated: May 25, 2026

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  • Analyzed H-reflex and M-wave recruitment curves, normalizing data for comparison.

    • Main Results:

    • High test-retest reliability (ICCs 0.55-0.95) was found for FCR H-reflexes in both groups.
    • Paretic limb H-reflex amplitude and slope were significantly greater compared to non-paretic limbs and non-disabled controls.
    • Longer stroke chronicity and younger age correlated with greater Hslp/Mslp, indicating neurophysiological differences.

    Conclusions:

    • FCR H-reflexes demonstrate reliable measurement properties in stroke and non-disabled individuals.
    • Standard error of measurement (SEM) and smallest real difference (SRD) can quantify recovery and intervention effects.
    • FCR H-reflexes offer a reliable method for investigating neurophysiological mechanisms underlying motor recovery post-stroke.