Severe acute hypoxia reduces motor unit firing rate during isometric contractions

Daniel McKeown; Justin Kavanagh

Severe acute hypoxia reduces motor unit firing rate during isometric contractions

^*Corresponding author for this work

Research output: Contribution to conference › Abstract › Research › peer-review

Abstract

Although reducing blood oxygen saturation (SpO2) can cause rapid changes in corticospinal-motoneuronal activity, few studies have examined the direct consequences that hypoxia has on muscle activation. The purpose of this study was to examine how severe acute hypoxia affects firing rate and recruitment characteristics of a population of motor units (MU) in the biceps brachii. Given that the amplitude of interference EMG is often reduced with hypoxia, it was hypothesised that (MU) firing rate would decrease, accompanied by an increase in MU recruitment threshold.

Original language	English
Pages	91-91
Number of pages	1
Publication status	Published - 1 Dec 2018
Externally published	Yes
Event	First International Motor Impairment Conference 2018 - Crowne Plaza, Sydney, Australia Duration: 26 Nov 2018 → 28 Nov 2018 https://motorimpairment.org/past-conferences/first-international-motor-impairment-conference-2018/

Conference

Conference	First International Motor Impairment Conference 2018
Country/Territory	Australia
City	Sydney
Period	26/11/18 → 28/11/18
Internet address	https://motorimpairment.org/past-conferences/first-international-motor-impairment-conference-2018/

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https://motorimpairment.org/past-conferences/first-international-motor-impairment-conference-2018/program/Licence: Free to read

Cite this

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title = "Severe acute hypoxia reduces motor unit firing rate during isometric contractions",

abstract = "Although reducing blood oxygen saturation (SpO2) can cause rapid changes in corticospinal-motoneuronal activity, few studies have examined the direct consequences that hypoxia has on muscle activation. The purpose of this study was to examine how severe acute hypoxia affects firing rate and recruitment characteristics of a population of motor units (MU) in the biceps brachii. Given that the amplitude of interference EMG is often reduced with hypoxia, it was hypothesised that (MU) firing rate would decrease, accompanied by an increase in MU recruitment threshold.",

author = "Daniel McKeown and Justin Kavanagh",

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language = "English",

pages = "91--91",

note = "First International Motor Impairment Conference 2018 ; Conference date: 26-11-2018 Through 28-11-2018",

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TY - CONF

T1 - Severe acute hypoxia reduces motor unit firing rate during isometric contractions

AU - McKeown, Daniel

AU - Kavanagh, Justin

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Although reducing blood oxygen saturation (SpO2) can cause rapid changes in corticospinal-motoneuronal activity, few studies have examined the direct consequences that hypoxia has on muscle activation. The purpose of this study was to examine how severe acute hypoxia affects firing rate and recruitment characteristics of a population of motor units (MU) in the biceps brachii. Given that the amplitude of interference EMG is often reduced with hypoxia, it was hypothesised that (MU) firing rate would decrease, accompanied by an increase in MU recruitment threshold.

AB - Although reducing blood oxygen saturation (SpO2) can cause rapid changes in corticospinal-motoneuronal activity, few studies have examined the direct consequences that hypoxia has on muscle activation. The purpose of this study was to examine how severe acute hypoxia affects firing rate and recruitment characteristics of a population of motor units (MU) in the biceps brachii. Given that the amplitude of interference EMG is often reduced with hypoxia, it was hypothesised that (MU) firing rate would decrease, accompanied by an increase in MU recruitment threshold.

UR - https://motorimpairment.org/home/abstract-submission/

M3 - Abstract

SP - 91

EP - 91

T2 - First International Motor Impairment Conference 2018

Y2 - 26 November 2018 through 28 November 2018

ER -

Severe acute hypoxia reduces motor unit firing rate during isometric contractions

Abstract

Conference

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