Preparation and execution of teeth clenching and foot muscle contraction influence on corticospinal hand-muscle excitability

Loading...
Thumbnail Image

Access rights

openAccess

URL

Journal Title

Journal ISSN

Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2017-01-24

Department

Department of Neuroscience and Biomedical Engineering

Major/Subject

Mcode

Degree programme

Language

en

Pages

1-9

Series

Scientific Reports, Volume 7

Abstract

Contraction of a muscle modulates not only the corticospinal excitability (CSE) of the contracting muscle but also that of different muscles. We investigated to what extent the CSE of a hand muscle is modulated during preparation and execution of teeth clenching and ipsilateral foot dorsiflexion either separately or in combination. Hand-muscle CSE was estimated based on motor evoked potentials (MEPs) elicited by transcranial magnetic stimulation (TMS) and recorded from the first dorsal interosseous (FDI) muscle. We found higher excitability during both preparation and execution of all the motor tasks than during mere observation of a fixation cross. As expected, the excitability was greater during the execution phase than the preparation one. Furthermore, both execution and preparation of combined motor tasks led to higher excitability than individual tasks. These results extend our current understanding of the neural interactions underlying simultaneous contraction of muscles in different body parts.

Description

Keywords

Other note

Citation

Komeilipoor, N, Ilmoniemi, R J, Tiippana, K, Vainio, M, Tiainen, M & Vainio, L 2017, ' Preparation and execution of teeth clenching and foot muscle contraction influence on corticospinal hand-muscle excitability ', Scientific Reports, vol. 7, 41249, pp. 1-9 . https://doi.org/10.1038/srep41249