PMID- 36724583 OWN - NLM STAT- MEDLINE DCOM- 20230911 LR - 20230911 IS - 1769-7131 (Electronic) IS - 0987-7053 (Linking) VI - 53 IP - 3 DP - 2023 Jun TI - Multimodal integration and modulation of visual and somatosensory inputs on the corticospinal excitability. PG - 102842 LID - S0987-7053(22)00126-5 [pii] LID - 10.1016/j.neucli.2022.102842 [doi] AB - OBJECTIVE: Corticospinal excitability may be affected by various sensory inputs under physiological conditions. In this study, we aimed to investigate the corticospinal excitability by using multimodal conditioning paradigms of combined somatosensory electrical and visual stimulation to understand the sensory-motor integration. METHODS: We examined motor evoked potentials (MEP) obtained by using transcranial magnetic stimulation (TMS) that were conditioned by using a single goggle-light-emitting diode (LED) stimulation, peripheral nerve electrical stimulation (short latency afferent inhibition protocol), or a combination of both (goggle-LED+electrical stimulation) at different interstimulus intervals (ISIs) in 14 healthy volunteers. RESULTS: We found MEP inhibition at ISIs of 50-60 ms using the conditioned goggle-LED stimulation. The combined goggle-LED stimulation at a 60 ms ISI resulted in an additional inhibition to the electrical stimulation. CONCLUSIONS: Visual inputs cause significant modulatory effects on the corticospinal excitability. Combined visual and somatosensory stimuli integrate probably via different neural circuits and/or interneuron populations. To our knowledge, multimodal integration of visual and somatosensory inputs by using TMS-short latency inhibition protocol have been evaluated via electrophysiological methods for the first time in this study. CI - Copyright (c) 2022 Elsevier Masson SAS. All rights reserved. FAU - Yildiz, Fatma Gokcem AU - Yildiz FG AD - Faculty of Medicine, Department of Neurology, Hacettepe Univesity, EMG-TMS Unit, Ankara, Turkey; Hacettepe University, Institute of Neurological Sciences and Psychiatry, Ankara, Turkey. Electronic address: gokcemyildiz@hotmail.com. FAU - Temucin, Cagri Mesut AU - Temucin CM AD - Faculty of Medicine, Department of Neurology, Hacettepe Univesity, EMG-TMS Unit, Ankara, Turkey. LA - eng PT - Journal Article DEP - 20230131 PL - France TA - Neurophysiol Clin JT - Neurophysiologie clinique = Clinical neurophysiology JID - 8804532 SB - IM MH - Humans MH - *Evoked Potentials, Motor/physiology MH - Electric Stimulation/methods MH - Reaction Time/physiology MH - Time MH - *Transcranial Magnetic Stimulation/methods MH - Neural Inhibition/physiology MH - Muscle, Skeletal/physiology OTO - NOTNLM OT - Goggle LED OT - Multimodal integration OT - Short latency afferent inhibition OT - Transcranial magnetic stimulation OT - Visual cortex COIS- Declaration of Competing Interest None of the authors has any direct or indirect conflicts of interest. EDAT- 2023/02/02 06:00 MHDA- 2023/09/11 06:42 CRDT- 2023/02/01 18:08 PHST- 2022/06/20 00:00 [received] PHST- 2022/12/06 00:00 [revised] PHST- 2022/12/17 00:00 [accepted] PHST- 2023/09/11 06:42 [medline] PHST- 2023/02/02 06:00 [pubmed] PHST- 2023/02/01 18:08 [entrez] AID - S0987-7053(22)00126-5 [pii] AID - 10.1016/j.neucli.2022.102842 [doi] PST - ppublish SO - Neurophysiol Clin. 2023 Jun;53(3):102842. doi: 10.1016/j.neucli.2022.102842. Epub 2023 Jan 31.