Adaptation of cutaneous stumble correction when tripping is part of the locomotor environment

Journal of Neurophysiology
Carlos HaridasJohn E Misiaszek

Abstract

We recently showed that cutaneous reflexes evoked by stimulating the superficial peroneal (SP; innervates foot dorsum) nerve are modulated according to the level of postural threat. Context-related modulation was observed mainly in contralateral (c) responses but not in the ipsilateral responses. This lack of effect on ipsilateral (i) cutaneous reflexes might have been caused by the general nature of the whole body perturbation. We therefore hypothesized that context-relevant mechanical perturbations applied to the dorsum of the foot by an instrumented rod at early swing during walking would produce differences in ipsilateral cutaneous reflex amplitudes, consistent with the functional relevance of the SP nerve in stumble correction responses. Subjects walked on a motorized treadmill under four conditions: 1) normal, 2) normal with mechanical perturbations at the foot dorsum, 3) arms crossed, and 4) arms crossed with mechanical perturbations at the foot dorsum. Electrical stimulation of the SP nerve was delivered at five phases of the step cycle, and cutaneous reflexes were compared between all conditions for each phase of the step cycle. Reflex responses were generally found to be modulated in amplitude during walking condition...Continue Reading

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Citations

Mar 14, 2013·Experimental Brain Research·Juan Forero, John E Misiaszek
Jul 10, 2012·Journal of Neurophysiology·Wouter HoogkamerJacques Duysens
May 20, 2014·Experimental Brain Research·Juan Forero, John E Misiaszek
Aug 16, 2011·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·P W StubbsN Mrachacz-Kersting
Apr 30, 2010·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Maria Knikou
Feb 4, 2011·Gait & Posture·Bhavini HariaChristopher Smith
May 14, 2010·Journal of Neurophysiology·Jacques DuysensBouwien Smits-Engelsman
Oct 25, 2013·Journal of Neurophysiology·Casey R RuffDaniel S Marigold
Apr 11, 2014·Journal of Neurophysiology·David LoganJohn J Jeka
Nov 15, 2017·Medicine and Science in Sports and Exercise·Taryn KlarnerE Paul Zehr
May 10, 2017·Experimental Brain Research·Zrinka Potocanac, Jacques Duysens
Aug 8, 2019·Aging Clinical and Experimental Research·Raisa RossignaudAndré L F Rodacki

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