Modulation of H-Reflex Depression with Paired-Pulse Stimulation in Healthy Active Humans

Preeti D Oza; Shauna Dudley-Javoroski; Richard K Shields

doi:10.1155/2017/5107097

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Modulation of H-Reflex Depression with Paired-Pulse Stimulation in Healthy Active Humans

Journal article

Open access

Peer reviewed

Modulation of H-Reflex Depression with Paired-Pulse Stimulation in Healthy Active Humans

Preeti D Oza, Shauna Dudley-Javoroski and Richard K Shields

Rehabilitation research and practice, Vol.2017, pp.1-6

2017

DOI: 10.1155/2017/5107097

PMCID: PMC5684600

PMID: 29225972

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Abstract

Depression of the Hoffman reflex (H-reflex) is used to examine spinal control mechanisms during exercise, fatigue, and vibration and in response to training. H-reflex depression protocols frequently use trains of stimuli; this is time-consuming and prevents instantaneous assessment of motor neuronal excitability. The purpose of this study was to determine if paired-pulse H-reflex depression is reproducible and whether paired-pulse stimulation adequately estimates the depression induced by the more traditional ten-pulse train. H-reflexes were elicited via ten-pulse trains at 0.1, 0.2, 1, 2, and 5 Hz in ten neurologically intact individuals on two separate days. We measured the depression elicited by the second pulse (H2) and the mean depression elicited by pulses 2–10 (Hmean). H2 was consistent at all frequencies on both days (r2 = 0.97, p<0.05, and ICC(3,1) = 0.81). H2 did not differ from Hmean (p>0.05). The results indicate that paired-pulse H-reflex depression has high between-day reliability and yields depression estimates that are comparable to those obtained via ten-pulse trains. Paired-pulse H-reflex depression may be especially useful for studies that require rapid assessment of motor neuronal excitability, such as during exercise, fatigue, and vibration, or to establish recovery curves following inhibition.

Details

Title: Subtitle: Modulation of H-Reflex Depression with Paired-Pulse Stimulation in Healthy Active Humans
Creators: Preeti D Oza - Department of Physical Therapy, University of the Pacific, 3601 Pacific Avenue, Stockton, CA 95211, USA
Shauna Dudley-Javoroski - Department of Physical Therapy Rehabilitation Science, Roy J. and Lucille A. Carver College of Medicine, The University of Iowa, 500 Newton Road, 1-252 MEB, Iowa City, IA 52242, USA
Richard K Shields - Department of Physical Therapy Rehabilitation Science, Roy J. and Lucille A. Carver College of Medicine, The University of Iowa, 500 Newton Road, 1-252 MEB, Iowa City, IA 52242, USA
Resource Type: Journal article
Publication Details: Rehabilitation research and practice, Vol.2017, pp.1-6
DOI: 10.1155/2017/5107097
PMID: 29225972
PMCID: PMC5684600
NLM abbreviation: Rehabil Res Pract
ISSN: 2090-2867
eISSN: 2090-2875
Grant note: DOI: 10.13039/100000002, name: National Institutes of Health, award: R01-HD-084645, R01-HD082109
Language: English
Date published: 2017
Academic Unit: Orthopedics and Rehabilitation; Physical Therapy and Rehabilitation Science
Record Identifier: 9984047752802771

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