The effect of trial number on the emergence of the 'broken escalator' locomotor aftereffect.

Experimental Brain Research
Karen L BundayAdolfo M Bronstein

Abstract

Walking onto a stationary platform, which had been previously experienced as moving generates a locomotor aftereffect (LAE), which resembles the 'broken escalator' phenomenon. Experimentally, this is achieved by having subjects walk initially onto a stationary sled (BEFORE condition), then onto a moving sled (MOVING condition, or adaptation trials) and then again onto the stationary sled (AFTER condition). Subjects are always appropriately warned of the change in conditions. In this paper, we ask how many adaptation trials are needed to produce such a LAE. Thus, in two experiments, the number of MOVING trials was varied between 20 and 5 (Experiment 1) and between 8 and 1 (Experiment 2). Gait velocity, trunk position, foot contact timing and EMG of the ankle flexor-extensors muscles were measured. In comparison with BEFORE trials all groups in the AFTER trials walked inappropriately fast, experienced a large overshoot of the trunk and showed increased leg EMG, indicating that all groups showed a LAE. In each experiment, and for all variables, no significant difference between the groups (i.e. 20 down to one MOVING trials) was found. The study shows that this LAE, in contrast to other motor aftereffects reported in the literature...Continue Reading

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Citations

Mar 8, 2013·Experimental Brain Research·K-S TangA M Bronstein
Aug 29, 2012·Dysphagia·Ianessa A HumbertPablo Celnik
Aug 8, 2007·Journal of Neural Transmission·R Reynolds, A Bronstein
Mar 10, 2012·Journal of Applied Physiology·Ianessa A HumbertAlice Stone
Sep 11, 2009·Journal of Neurophysiology·Karen L Bunday, Adolfo M Bronstein
Apr 10, 2014·Experimental Brain Research·Mitesh PatelAdolfo M Bronstein
Feb 26, 2014·Human Movement Science·Anderson Souza Castelo OliveiraUwe Gustav Kersting
Feb 24, 2009·Gait & Posture·Rachel A BradyJacob J Bloomberg
Oct 28, 2008·Gait & Posture·Marleen H van der LindenJacques Duysens
Aug 4, 2009·Annals of the New York Academy of Sciences·Adolfo M BronsteinRaymond Reynolds
Jul 14, 2010·Neuroscience·D A GreenA M Bronstein
Apr 24, 2012·Gait & Posture·Anderson Souza Castelo OliveiraUwe Gustav Kersting
Jan 12, 2007·Current Opinion in Neurology·Adolfo M Bronstein
Jan 11, 2008·Journal of Neurophysiology·Karen L Bunday, Adolfo M Bronstein
Aug 12, 2020·Brain : a Journal of Neurology·Denise LinDiego Kaski
Jul 15, 2015·Journal of Neurophysiology·Mitesh PatelAdolfo M Bronstein
Mar 3, 2020·Journal of Vestibular Research : Equilibrium & Orientation·Mitesh PatelAdolfo M Bronstein

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