Tactile Imagery (TI) remains a fairly understudied phenomenon despite growing attention to this topic in recent years. Here, we investigated the effects of TI on corticospinal excitability by measuring motor evoked potentials (MEPs) induced by single-pulse transcranial magnetic stimulation (TMS). The effects of TI were compared with those of tactile stimulation (TS) and kinesthetic motor imagery (kMI). Twenty-two participants performed three tasks in randomly assigned order: imagine finger tapping (kMI); experience vibratory sensations in the middle finger (TS); and mentally reproduce the sensation of vibration (TI). MEPs increased during both kMI and TI, with a stronger increase for kMI. No statistically significant change in MEP was observed during TS. The demonstrated differential effects of kMI, TI and TS on corticospinal excitability have practical implications for devising the imagery-based and TS-based brain-computer interfaces (BCIs), particularly the ones intended to improve neurorehabilitation by evoking plasticity changes in sensorimotor circuitry.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11211487 | PMC |
| http://dx.doi.org/10.1038/s41598-024-64665-6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spinally targeted paired associated stimulation with high-frequency peripheral component induces spinal level plasticity in healthy subjects.
Sci Rep
December 2024
BioMag Laboratory, HUS Diagnostic Center, Helsinki University Hospital, University of Helsinki and Aalto University School of Science, Helsinki, Finland.
A novel variant of paired-associative stimulation (PAS) consisting of high-frequency peripheral nerve stimulation (PNS) and high-intensity transcranial magnetic stimulation (TMS) above the motor cortex, called high-PAS, can lead to improved motor function in patients with incomplete spinal cord injury. In PAS, the interstimulus interval (ISI) between the PNS and TMS pulses plays a significant role in the location of the intended effect of the induced plastic changes. While conventional PAS protocols (single TMS pulse often applied with intensity close to resting motor threshold, and single PNS pulse) usually require precisely defined ISIs, high-PAS can induce plasticity at a wide range of ISIs and also in spite of small ISI errors, which is helpful in clinical settings where precise ISI determination can be challenging.
View Article and Find Full Text PDFCorticospinal and Clinical Effects of Muscle Tendon Vibration in Neurologically Impaired Individuals. A Scoping Review.
J Mot Behav
December 2024
Laboratoire de recherche Biomécanique & Neurophysiologique en Réadaptation neuro-musculo-squelettique, Centre intersectoriel en santé durable, Université du Québec à Chicoutimi, Chicoutimi, Canada.
This review verified the extent, variety, quality and main findings of studies that have tested the neurophysiological and clinical effects of muscle tendon vibration (VIB) in individuals with sensorimotor impairments. The search was conducted on PubMed, CINAHL, and SportDiscuss up to April 2024. Studies were selected if they included humans with neurological impairments, applied VIB and used at least one measure of corticospinal excitability using transcranial magnetic stimulation (TMS).
View Article and Find Full Text PDFAccurate determination of motor evoked potential amplitude in TMS: The impact of personal and experimental factors.
Clin Neurophysiol
December 2024
REVAL - Rehabilitation Research Center, Faculty of Rehabilitation Sciences, University of Hasselt, Diepenbeek, Belgium.
Objective: Corticospinal excitability can be quantified using motor-evoked potentials (MEP) following transcranial magnetic stimulation (TMS). However, the inherent variability of MEPs poses significant challenges. We establish a framework using personal and experimental factors to select the optimal number of trials (n) required for reliable MEP estimates.
View Article and Find Full Text PDFCorticospinal excitability is not facilitated by observation of asymmetric walking on a split-belt treadmill in humans.
Neuroreport
December 2024
Faculty of Health and Sports Science, Doshisha University, Kyotanabe, Kyoto, Japan.
The present study aimed to investigate changes in corticospinal excitability (CSE) by observing unnatural walking patterns on a treadmill with different left and right belt speeds. Fifteen healthy adults watched video clips (10 s each) of walking under the tied condition (left and right treadmill belt speeds are the same), walking during the initial and late periods under the split-belt condition (left and right treadmill belt speeds are different), and the static fixation cross (control condition) in random order. The step lengths of the actor in the walking clips were almost symmetric under the tied condition and during the late period under the split-belt condition but largely asymmetric during the initial period under the split-belt condition.
View Article and Find Full Text PDFAssociative brain computer interface training increases wrist extensor corticospinal excitability in subacute stroke patients.
J Neurophysiol
December 2024
Institute of Sport and Sport Science, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany.
In a recently developed associative rehabilitative brain computer interface system, electroencephalography is used to identify the most active phase of the motor cortex during attempted movement and deliver precisely timed peripheral stimulation during training. This approach has been demonstrated to facilitate corticospinal excitability and functional recovery in patients with lower limb weakness following stroke. The current study expands those findings by investigating changes in corticospinal excitability following the associative BCI intervention in post-stroke patients with upper limb weakness.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!