Effects of cutaneous stimulation on ipsilateral and contralateral motoneuron excitability: An analysis using H reflexes and F waves

D. Walk, M. A. Fisher

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

F waves are altered by conditioning stimulation of digital nerves. We investigated this by studying series of median nerve F waves recorded from abductor pollicis brevis (APB) 20, 50, 80, 100, 150, 200, and 500 milliseconds (ms) after conditioning stimuli applied to the ipsilateral or contralateral second digit in six normal subjects. The persistence and mean amplitude of the F waves were determined at each delay and compared with control F waves without conditioning stimuli. Ipsilateral afferent stimulation produced inhibition of F wave amplitude and persistence when applied 50 to 100 ms before the test stimulus, while contralateral conditioning stimuli facilitated the F wave when applied 80 to 200 ms before the test stimulus. Similar results were obtained in H reflex studies in one neurologically normal subject with a reproducible II reflex recording from the APB. These findings illustrate definable ipsilateral and contralateral postsynaptic influences of afferent fibers on motoneuron excitability in the arms.

Original languageEnglish (US)
Pages (from-to)259-264
Number of pages6
JournalElectromyography and Clinical Neurophysiology
Volume33
Issue number5
StatePublished - Jan 1 1993

Fingerprint

H-Reflex
Motor Neurons
Skin
Median Nerve
Reflex
Conditioning (Psychology)

Cite this

@article{50b743b7c660443eb9d40199d9edf425,
title = "Effects of cutaneous stimulation on ipsilateral and contralateral motoneuron excitability: An analysis using H reflexes and F waves",
abstract = "F waves are altered by conditioning stimulation of digital nerves. We investigated this by studying series of median nerve F waves recorded from abductor pollicis brevis (APB) 20, 50, 80, 100, 150, 200, and 500 milliseconds (ms) after conditioning stimuli applied to the ipsilateral or contralateral second digit in six normal subjects. The persistence and mean amplitude of the F waves were determined at each delay and compared with control F waves without conditioning stimuli. Ipsilateral afferent stimulation produced inhibition of F wave amplitude and persistence when applied 50 to 100 ms before the test stimulus, while contralateral conditioning stimuli facilitated the F wave when applied 80 to 200 ms before the test stimulus. Similar results were obtained in H reflex studies in one neurologically normal subject with a reproducible II reflex recording from the APB. These findings illustrate definable ipsilateral and contralateral postsynaptic influences of afferent fibers on motoneuron excitability in the arms.",
author = "D. Walk and Fisher, {M. A.}",
year = "1993",
month = "1",
day = "1",
language = "English (US)",
volume = "33",
pages = "259--264",
journal = "Electromyography and Clinical Neurophysiology",
issn = "0301-150X",
publisher = "Editions Nauwelaerts SA",
number = "5",

}

TY - JOUR

T1 - Effects of cutaneous stimulation on ipsilateral and contralateral motoneuron excitability

T2 - An analysis using H reflexes and F waves

AU - Walk, D.

AU - Fisher, M. A.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - F waves are altered by conditioning stimulation of digital nerves. We investigated this by studying series of median nerve F waves recorded from abductor pollicis brevis (APB) 20, 50, 80, 100, 150, 200, and 500 milliseconds (ms) after conditioning stimuli applied to the ipsilateral or contralateral second digit in six normal subjects. The persistence and mean amplitude of the F waves were determined at each delay and compared with control F waves without conditioning stimuli. Ipsilateral afferent stimulation produced inhibition of F wave amplitude and persistence when applied 50 to 100 ms before the test stimulus, while contralateral conditioning stimuli facilitated the F wave when applied 80 to 200 ms before the test stimulus. Similar results were obtained in H reflex studies in one neurologically normal subject with a reproducible II reflex recording from the APB. These findings illustrate definable ipsilateral and contralateral postsynaptic influences of afferent fibers on motoneuron excitability in the arms.

AB - F waves are altered by conditioning stimulation of digital nerves. We investigated this by studying series of median nerve F waves recorded from abductor pollicis brevis (APB) 20, 50, 80, 100, 150, 200, and 500 milliseconds (ms) after conditioning stimuli applied to the ipsilateral or contralateral second digit in six normal subjects. The persistence and mean amplitude of the F waves were determined at each delay and compared with control F waves without conditioning stimuli. Ipsilateral afferent stimulation produced inhibition of F wave amplitude and persistence when applied 50 to 100 ms before the test stimulus, while contralateral conditioning stimuli facilitated the F wave when applied 80 to 200 ms before the test stimulus. Similar results were obtained in H reflex studies in one neurologically normal subject with a reproducible II reflex recording from the APB. These findings illustrate definable ipsilateral and contralateral postsynaptic influences of afferent fibers on motoneuron excitability in the arms.

UR - http://www.scopus.com/inward/record.url?scp=0027239985&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027239985&partnerID=8YFLogxK

M3 - Article

C2 - 8404560

AN - SCOPUS:0027239985

VL - 33

SP - 259

EP - 264

JO - Electromyography and Clinical Neurophysiology

JF - Electromyography and Clinical Neurophysiology

SN - 0301-150X

IS - 5

ER -