Corticospinal facilitation of erector spinae and rectus abdominis muscles during graded voluntary contractions is task specific: A pilot study on healthy individuals

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Abstract

Introduction: In this study we compared transcranial magnetic stimulation (TMS) elicited motor evoked potentials (MEPs) in a postural (bilateral low back extension: BLBE) and a respiratory (forced expiration during breath holding: FEBH) task. Methods: Using TMS of the left motor cortex, simultaneous patterns of corticospinal facilitation of the contralateral erector spinae (ES) and rectus abdominis (RA) muscles during graded voluntary activation were compared in seven healthy subjects. Result: The facilitation pattern demonstrated task dependency by showing that MEP amplitudes in the ES muscle tended to be smaller at any given contraction level in the FEBH task than in the BLBE task. Discussion: The results suggested a linear-type relationship between the size of MEPs with increasing background contraction of ES and RA in the BLBE task. However, both muscles showed a plateau effect with higher background contractions (>50 of maximum) during the FEBH task. The varied response of ES and RA across these two tasks reinforces the importance of task specific training in clinical settings.
Original languageEnglish
Pages (from-to)27 - 34
Number of pages8
JournalBasic and Clinical Neuroscience
Volume4
Issue number3
Publication statusPublished - 2013

Cite this

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title = "Corticospinal facilitation of erector spinae and rectus abdominis muscles during graded voluntary contractions is task specific: A pilot study on healthy individuals",
abstract = "Introduction: In this study we compared transcranial magnetic stimulation (TMS) elicited motor evoked potentials (MEPs) in a postural (bilateral low back extension: BLBE) and a respiratory (forced expiration during breath holding: FEBH) task. Methods: Using TMS of the left motor cortex, simultaneous patterns of corticospinal facilitation of the contralateral erector spinae (ES) and rectus abdominis (RA) muscles during graded voluntary activation were compared in seven healthy subjects. Result: The facilitation pattern demonstrated task dependency by showing that MEP amplitudes in the ES muscle tended to be smaller at any given contraction level in the FEBH task than in the BLBE task. Discussion: The results suggested a linear-type relationship between the size of MEPs with increasing background contraction of ES and RA in the BLBE task. However, both muscles showed a plateau effect with higher background contractions (>50 of maximum) during the FEBH task. The varied response of ES and RA across these two tasks reinforces the importance of task specific training in clinical settings.",
author = "Shapour Jaberzadeh and Maryam Zoghi and Morgan, {Prue Elizabeth} and Michael Storr",
year = "2013",
language = "English",
volume = "4",
pages = "27 -- 34",
journal = "Basic and Clinical Neuroscience",
issn = "2228-7442",
publisher = "Tehran University of Medical Sciences",
number = "3",

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TY - JOUR

T1 - Corticospinal facilitation of erector spinae and rectus abdominis muscles during graded voluntary contractions is task specific: A pilot study on healthy individuals

AU - Jaberzadeh, Shapour

AU - Zoghi, Maryam

AU - Morgan, Prue Elizabeth

AU - Storr, Michael

PY - 2013

Y1 - 2013

N2 - Introduction: In this study we compared transcranial magnetic stimulation (TMS) elicited motor evoked potentials (MEPs) in a postural (bilateral low back extension: BLBE) and a respiratory (forced expiration during breath holding: FEBH) task. Methods: Using TMS of the left motor cortex, simultaneous patterns of corticospinal facilitation of the contralateral erector spinae (ES) and rectus abdominis (RA) muscles during graded voluntary activation were compared in seven healthy subjects. Result: The facilitation pattern demonstrated task dependency by showing that MEP amplitudes in the ES muscle tended to be smaller at any given contraction level in the FEBH task than in the BLBE task. Discussion: The results suggested a linear-type relationship between the size of MEPs with increasing background contraction of ES and RA in the BLBE task. However, both muscles showed a plateau effect with higher background contractions (>50 of maximum) during the FEBH task. The varied response of ES and RA across these two tasks reinforces the importance of task specific training in clinical settings.

AB - Introduction: In this study we compared transcranial magnetic stimulation (TMS) elicited motor evoked potentials (MEPs) in a postural (bilateral low back extension: BLBE) and a respiratory (forced expiration during breath holding: FEBH) task. Methods: Using TMS of the left motor cortex, simultaneous patterns of corticospinal facilitation of the contralateral erector spinae (ES) and rectus abdominis (RA) muscles during graded voluntary activation were compared in seven healthy subjects. Result: The facilitation pattern demonstrated task dependency by showing that MEP amplitudes in the ES muscle tended to be smaller at any given contraction level in the FEBH task than in the BLBE task. Discussion: The results suggested a linear-type relationship between the size of MEPs with increasing background contraction of ES and RA in the BLBE task. However, both muscles showed a plateau effect with higher background contractions (>50 of maximum) during the FEBH task. The varied response of ES and RA across these two tasks reinforces the importance of task specific training in clinical settings.

UR - http://bcn.iums.ac.ir/browse.php?a_id=404&sid=1&slc_lang=en

M3 - Article

VL - 4

SP - 27

EP - 34

JO - Basic and Clinical Neuroscience

JF - Basic and Clinical Neuroscience

SN - 2228-7442

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ER -