How do different movement references influence ERP related to gait initiation? A comparative methods’ assessment

•Movement-Related Cortical Potential depends upon the chosen movement trigger.•MRCPs reflect the processes underlying any voluntary movement (e.g. gait initiation).•A comparative assessment is performed using triggers from different instruments.•Forceplate trigger gives the best signal strength to s...

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Bibliographic Details
Published in:Journal of neuroscience methods 2019-01, Vol.311, p.95-101
Main Authors: Russo, Yuri, Berchicci, Marika, Di Russo, Francesco, Vannozzi, Giuseppe
Format: Article
Language:English
Subjects:
Adult
Biomechanics
Cerebral Cortex - physiology
Contingent Negative Variation
Electroencephalography
Electromyography
Evoked Potentials
Female
Gait Analysis - methods
Humans
Locomotion
Male
Motion capture
Motor potential
Signal Processing, Computer-Assisted
Stepping
Young Adult
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Summary:•Movement-Related Cortical Potential depends upon the chosen movement trigger.•MRCPs reflect the processes underlying any voluntary movement (e.g. gait initiation).•A comparative assessment is performed using triggers from different instruments.•Forceplate trigger gives the best signal strength to study gait initiation. Movement-Related Cortical Potentials (MRCPs) are widely used in studying brain dynamics of motor control. However, limited information is available on complex tasks such as locomotion for which the appropriate identification of gait initiation trigger is still a technical challenge. Thus, it is conceivable that recorded brain activity may vary due to the instrument used to provide the temporal trigger. Therefore, a comparative assessment was performed to determine whether and how trigger identification techniques affect the MRCP in gait initiation. Eleven able-bodied young participants performed 200 forward- and 200 backward-oriented self-initiated steps. Brain activity was recorded through 64-channel electroencephalography. Four different triggering techniques were tested based on measurements of surface electromyography, stereophotogrammetry and forceplates. Repeated-Measures ANOVAs on the mean amplitude of the Bereitschaftspotential and on both peak amplitude and latency of the motor potential showed a main effect of the triggering technique (p 
ISSN:0165-0270
1872-678X
DOI:10.1016/j.jneumeth.2018.10.006