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Resting Motor Threshold, MEP and TEP Variability During Daytime.

Ter Braack, EM ; de Goede AA ; et al.
In: Brain topography, Jg. 32 (2019), Heft 1, S. 17-27
Online academicJournal
Zugriff:
View record at Springer (Volltext)

Humans show a variation in physiological processes during the day. To reliably assess (changes in) cortical excitability with transcranial magnetic stimulation (TMS), it is relevant to know the natural variation in TMS readouts during the day. In case of significant daytime variations, this should be taken into account when scheduling (follow-up) measurements. This study aims to evaluate the influence of the time of day on the resting motor threshold (RMT), motor evoked potential (MEP) and TMS evoked potential (TEP) in healthy controls. TMS-EMG-EEG was recorded in 16 healthy subjects. At both motor cortices, we administered 75 pulses at an intensity of 110% RMT. Subjects were stimulated during five sessions in one day (8:00 AM, 10:30 AM, 1:00 PM, 3:30 PM and 6:00 PM) while keeping the stimulation intensity constant. We compared the TEP waveforms between the five sessions with a cluster-based permutation analysis, and the RMT and MEP amplitude with rmANOVA. In general there were no significant differences between the five sessions in the RMT, MEP amplitude or TEP. Only for the left side, N100 amplitude was larger at 3:30 PM than 10:30 AM. The standard deviation of the P30 and N100 amplitude was significantly higher between subjects within one session than within single subjects during the day. The TEP is highly reproducible during the day, with a low intra-individual variation compared to the inter-individual variation. In addition, we found no significant variation of the RMT and MEP amplitude between multiple sessions on one day.

Titel:
Resting Motor Threshold, MEP and TEP Variability During Daytime.
Autor/in / Beteiligte Person: Ter Braack, EM ; de Goede AA ; van Putten MJAM
Link:
Zeitschrift: Brain topography, Jg. 32 (2019), Heft 1, S. 17-27
Veröffentlichung: 1999- : New York : Kluwer Academic/Plenum Publishers ; <i>Original Publication</i>: [New York, NY : Human Sciences Press, c1988-, 2019
Medientyp: academicJournal
ISSN: 1573-6792 (electronic)
DOI: 10.1007/s10548-018-0662-7
Schlagwort:
  • Adult
  • Electroencephalography
  • Electromyography
  • Female
  • Healthy Volunteers
  • Humans
  • Male
  • Rest physiology
  • Evoked Potentials, Motor physiology
  • Motor Cortex physiology
  • Transcranial Magnetic Stimulation
Sonstiges:
  • Nachgewiesen in: MEDLINE
  • Sprachen: English
  • Publication Type: Journal Article; Research Support, Non-U.S. Gov't
  • Language: English
  • [Brain Topogr] 2019 Jan; Vol. 32 (1), pp. 17-27. <i>Date of Electronic Publication: </i>2018 Jul 17.
  • MeSH Terms: Transcranial Magnetic Stimulation* ; Evoked Potentials, Motor / *physiology ; Motor Cortex / *physiology ; Adult ; Electroencephalography ; Electromyography ; Female ; Healthy Volunteers ; Humans ; Male ; Rest / physiology
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  • Contributed Indexing: Keywords: Daytime variation; EEG; TMS; TMS evoked potential
  • Entry Date(s): Date Created: 20180719 Date Completed: 20190509 Latest Revision: 20200225
  • Update Code: 20231215
  • PubMed Central ID: PMC6326963

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