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Motor Evoked Potentials

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Multimodal treatment for spinal cord injury: a sword of neuroregeneration upon neuromodulation.

Ya Zheng, Ye-Ran Mao, Ti-Fei Yuan, Dong-Sheng Xu, Li-Ming Cheng,

Spinal cord injury is linked to the interruption of neural pathways, which results in irreversible neural dysfunction. Neural repair and neuroregeneration are critical goals and issues for rehabilitation in spinal cord injury, which require neural stem cell repair and multimodal neuromodulation techniques involving personalized rehabilitation strategies. Besides the involvement of ... Read more >>

Neural Regen Res (Neural regeneration research)
[2020, 15(8):1437-1450]

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Collagen scaffold combined with human umbilical cord-mesenchymal stem cells transplantation for acute complete spinal cord injury.

Wu-Sheng Deng, Ke Ma, Bing Liang, Xiao-Yin Liu, Hui-You Xu, Jian Zhang, Heng-Yuan Shi, Hong-Tao Sun, Xu-Yi Chen, Sai Zhang,

Currently, there is no effective strategy to promote functional recovery after a spinal cord injury. Collagen scaffolds can not only provide support and guidance for axonal regeneration, but can also serve as a bridge for nerve regeneration at the injury site. They can additionally be used as carriers to retain ... Read more >>

Neural Regen Res (Neural regeneration research)
[2020, 15(9):1686-1700]

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Short-latency afferent inhibition and somato-sensory evoked potentials during the migraine cycle: surrogate markers of a cycling cholinergic thalamo-cortical drive?

Gianluca Coppola, Davide Di Lenola, Chiara Abagnale, Fabio Ferrandes, Gabriele Sebastianelli, Francesco Casillo, Cherubino Di Lorenzo, Mariano Serrao, Maurizio Evangelista, Jean Schoenen, Francesco Pierelli,

<title>Abstract</title> <p> Background: Short-latency afferent inhibition (SAI) consists of motor cortex inhibition induced by sensory afferents and depends on the excitatory effect of cholinergic thalamocortical projections on inhibitory GABAergic cortical networks. Given the electrophysiological evidence for thalamo-cortical dysrhythmia in migraine, we studied SAI in migraineurs during and between ... Read more >>

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Human umbilical cord mesenchymal stem cells to treat spinal cord injury in the early chronic phase: study protocol for a prospective, multicenter, randomized, placebo-controlled, single-blinded clinical trial.

Yang Yang, Mao Pang, Yu-Yong Chen, Liang-Ming Zhang, Hao Liu, Jun Tan, Bin Liu, Li-Min Rong,

Human umbilical cord mesenchymal stem cells (hUC-MSCs) support revascularization, inhibition of inflammation, regulation of apoptosis, and promotion of the release of beneficial factors. Thus, they are regarded as a promising candidate for the treatment of intractable spinal cord injury (SCI). Clinical studies on patients with early chronic SCI (from 2 ... Read more >>

Neural Regen Res (Neural regeneration research)
[2020, 15(8):1532-1538]

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Gross Total Resection of a Grade IV Astrocytoma Adjacent to the Precentral Gyrus With Nonawake Motor Mapping and Motor-Evoked Potential Monitoring: 3-Dimensional Operative Video.

Burak Ozaydin, Ihsan Dogan, Bryan J Wheeler, Mustafa K Baskaya,

Surgical treatment of the gliomas located in or adjacent to the eloquent areas poses significant challenge to neurosurgeons. The main goal of the surgery is to achieve maximal safe resection while preserving the neurological function. This might be possible with utilizing pre- and intraoperative adjuncts such as functional magnetic resonance ... Read more >>

Oper Neurosurg (Hagerstown) (Operative neurosurgery (Hagerstown, Md.))
[2020, 18(4):E127-E128]

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Image-guided focused ultrasound modulates electrically evoked motor neuronal activity in the mouse peripheral nervous system in vivo.

Min Gon Kim, Hermes A S Kamimura, Stephen A Lee, Christian Aurup, Nancy Kwon, Elisa E Konofagou,

OBJECTIVE:Focused ultrasound (FUS) has recently been demonstrated capable of exciting motor neuronal activity. However, comprehensive understanding of elucidated excitatory and inhibitory effects is required to better assess FUS-mediated modulation. In this study, we demonstrate that image-guided FUS can selectively modulate motor neuron activity in the mouse sciatic nerve in vivo ... Read more >>

J Neural Eng (Journal of neural engineering)
[2020, 17(2):026026]

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Muscle-specific modulation of indirect inputs to primary motor cortex during action observation.

Andreea Loredana Cretu, Kathy L Ruddy, Alain Post, Nicole Wenderoth,

Single-pulse transcranial magnetic stimulation (spTMS) studies report that movement observation facilitates corticospinal excitability in primary motor cortex (M1) in a muscle-specific manner. However, motor evoked potentials (MEPs) elicited by spTMS are known to reflect the summation of several descending volleys in corticospinal neurons which are evoked via mono- and polysynaptic ... Read more >>

Exp Brain Res (Experimental brain research)
[2020, :]

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Unravelling the Modulation of Intracortical Inhibition During Motor Imagery: An Adaptive Threshold-Hunting Study.

Cécilia Neige, Dylan Rannaud Monany, Cathy M Stinear, Winston D Byblow, Charalambos Papaxanthis, Florent Lebon,

Motor imagery (MI) is the mental simulation of an action without any apparent muscular contraction. By means of transcranial magnetic stimulation (TMS), few studies revealed a decrease of short-interval intracortical inhibition (SICI) within the primary motor cortex. However, this decrease is ambiguous, as one would expect greater inhibition during MI ... Read more >>

Neuroscience (Neuroscience)
[2020, 434:102-110]

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Can genetic polymorphisms predict response variability to anodal transcranial direct current stimulation of the primary motor cortex?

Michael Pellegrini, Maryam Zoghi, Shapour Jaberzadeh,

Abstract Genetic mediation of cortical plasticity and the role genetic variants play in previously observed response variability to transcranial direct current stimulation (tDCS) have become important issues in the tDCS literature in recent years. This study investigated whether inter-individual variability to tDCS was in-part genetically mediated. In sixty-one healthy males, ... Read more >>

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Commentary: Gross Total Resection of a Grade IV Astrocytoma Adjacent to the Precentral Gyrus With Nonawake Motor Mapping and Motor-Evoked Potential Monitoring: 3-Dimensional Operative Video.

Ashish H Shah, Anil K Mahvadi, Michael E Ivan, Ricardo J Komotar,

Oper Neurosurg (Hagerstown) (Operative neurosurgery (Hagerstown, Md.))
[2020, 18(4):E129-E130]

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A single mechanism for global and selective response inhibition under the influence of motor preparation

Liisa Raud, René Huster, Richard Ivry, Ludovica Labruna, Mari Messel, Ian Greenhouse,

Abstract In our everyday behavior, we frequently cancel one movement while continuing others. Two competing models have been suggested for the cancellation of specific actions: 1) An abrupt global inhibition followed by the restart of the other previously initiated actions, or 2) the parallel operation of distinct global and selective ... Read more >>

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Neurophysiologic intraoperative monitoring (NIOM) in pediatric patients with polyneuropathy.

Jennifer L McKinney, Monica P Islam,

PURPOSE:Neurophysiologic intraoperative monitoring (NIOM) abnormalities during scoliosis surgery led to a diagnosis of Friedreich's ataxia in this illustrative case. This prompted the retrospective examination of NIOM for pediatric scoliosis surgery in polyneuropathy patients. METHODS:Among patients who underwent scoliosis surgery in 2010-2017, there were six polyneuropathy patients identified. Their clinical history ... Read more >>

Childs Nerv Syst (Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery)
[2020, :]

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Effect of Compound Muscle Action Potential After Peripheral Nerve Stimulation Normalization on Anesthetic Fade of Intraoperative Transcranial Motor-Evoked Potential.

Satoshi Tanaka, Tomoko Watanabe, Junko Takanashi, Hidehiro Oka, Ryo Hashimoto, Jiro Akimoto,

PURPOSE:Anesthetic fade refers to the time-dependent decrease in the amplitude of the intraoperative motor-evoked potential. It is thought to be caused by the accumulation of propofol. The authors examined whether normalization by the compound muscle action potential (CMAP) after peripheral nerve stimulation could compensate for anesthetic fade. METHODS:In 1,842 muscles ... Read more >>

J Clin Neurophysiol (Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society)
[2020, :]

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Re-emergent Tremor in Parkinson's Disease: The Role of the Motor Cortex.

Giorgio Leodori, Daniele Belvisi, Maria I De Bartolo, Andrea Fabbrini, Matteo Costanzo, Felipe Vial, Antonella Conte, Mark Hallett, Alfredo Berardelli,

BACKGROUND:Parkinson's disease patients may show a tremor that appears after a variable delay while the arms are kept outstretched (re-emergent tremor). The objectives of this study were to investigate re-emergent tremor pathophysiology by studying the role of the primary motor cortex in this tremor and making a comparison with rest ... Read more >>

Mov. Disord. (Movement disorders : official journal of the Movement Disorder Society)
[2020, :]

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The effects of transcranial direct current stimulation on corticospinal and cortico-cortical excitability and response variability: conventional versus high-definition montages

Michael Pellegrini, Maryam Zoghi, Shapour Jaberzadeh,

Abstract Response variability following transcranial direct current stimulation (tDCS) highlights need for exploring different tDCS electrode montages. This study compared corticospinal excitability (CSE), cortico-cortical excitability and intra-individual variability following conventional and HD anodal (a-tDCS) and cathodal (c-tDCS) tDCS. Fifteen healthy young males attended four sessions at least one-week apart: conventional ... Read more >>

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Machine learning analysis of motor evoked potential time series to predict disability progression in multiple sclerosis.

Jan Yperman, Thijs Becker, Dirk Valkenborg, Veronica Popescu, Niels Hellings, Bart Van Wijmeersch, Liesbet M Peeters,

BACKGROUND:Evoked potentials (EPs) are a measure of the conductivity of the central nervous system. They are used to monitor disease progression of multiple sclerosis patients. Previous studies only extracted a few variables from the EPs, which are often further condensed into a single variable: the EP score. We perform a ... Read more >>

BMC Neurol (BMC neurology)
[2020, 20(1):105]

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Induction of plasticity in the human motor system by motor imagery and transcranial magnetic stimulation.

K M Riashad Foysal, Stuart N Baker,

KEY POINTS:Delivering transcranial magnetic brain stimulation over the motor cortex during motor imagination leads to enhanced motor output, which is selective for the muscles primarily involved in the imagined movement. ABSTRACT:Several paired stimulation paradigms are known to induce plasticity in the motor cortex, reflected by changes in motor evoked potential ... Read more >>

J. Physiol. (Lond.) (The Journal of physiology)
[2020, :]

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Anesthesia management during meningomyelocele repair alongside motor-evoked potentials in a newborn and a small infant.

Gokce Gisi, Omer Faruk Boran,

Intraoperative neuromonitoring has become an increasingly commonly applied practice during surgical operations for preventing formation of neurological damage. Although it has been used on adults for a long time, the benefits and techniques of applying it in small children are not clear. We applied two different anesthesia protocols during meningomyelocele ... Read more >>

Childs Nerv Syst (Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery)
[2020, :]

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Three-dimensional bioprinting collagen/silk fibroin scaffold combined with neural stem cells promotes nerve regeneration after spinal cord injury.

Ji-Peng Jiang, Xiao-Yin Liu, Fei Zhao, Xiang Zhu, Xiao-Yin Li, Xue-Gang Niu, Zi-Tong Yao, Chen Dai, Hui-You Xu, Ke Ma, Xu-Yi Chen, Sai Zhang,

Many studies have shown that bio-scaffolds have important value for promoting axonal regeneration of injured spinal cord. Indeed, cell transplantation and bio-scaffold implantation are considered to be effective methods for neural regeneration. This study was designed to fabricate a type of three-dimensional collagen/silk fibroin scaffold (3D-CF) with cavities that simulate ... Read more >>

Neural Regen Res (Neural regeneration research)
[2020, 15(5):959-968]

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Timing of Modulation of Corticospinal Excitability by Heartbeat Differs with Interoceptive Accuracy.

Naofumi Otsuru, Shota Miyaguchi, Sho Kojima, Koya Yamashiro, Daisuke Sato, Hirotake Yokota, Kei Saito, Yasuto Inukai, Hideaki Onishi,

Interoceptive inputs are ascending information from the internal body. Cortical activities have been shown to be elicited by interoceptive inputs from the heartbeat at approximately 200-600 ms after the R wave, and sensory processing is modulated by the heartbeat within the time window. However, the influence of interoceptive inputs and their ... Read more >>

Neuroscience (Neuroscience)
[2020, 433:156-162]

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Therapeutic Impact of Traction Release After C5 Nerve Root Motor Evoked Potential (MEP) Alerts in Cervical Spine Surgery.

William B Wilent, John M Rhee, James S Harrop, Thomas Epplin-Zapf, Mitali Bose, Eric A Tesdahl, Jeffrey Cohen, Anthony K Sestokas,

STUDY DESIGN:A retrospective review of 40,919 cervical spine surgeries monitored with motor evoked potentials (MEPs) from a multi-institutional intraoperative neuromonitoring database. OBJECTIVE:The objective of this study was to determine the clinical impact of interventions prompted by C5 spinal nerve root MEP alerts. SUMMARY OF BACKGROUND DATA:MEPs have been shown to ... Read more >>

Clin Spine Surg (Clinical spine surgery)
[2020, :]

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Enhanced mirroring upon mutual gaze: Multimodal evidence from TMS-assessed corticospinal excitability and the EEG mu rhythm

Jellina Prinsen, Kaat Alaerts,

Abstract Eye-to-eye contact is a salient cue for regulating everyday social interaction and communication. Previous research has demonstrated that direct eye contact between actor and observer specifically enhances the ‘mirroring’ of others’ actions in the observer, as measured by transcranial magnetic stimulation (TMS)-induced motor evoked potentials (MEPs; an index of ... Read more >>

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Motor and spatial representations of action: corticospinal excitability in M1 after training with a bimanual skill.

Inchon Park, John J Buchanan, Austin T McCulloch, Jing Chen, David L Wright,

The purpose of the study was twofold: (1) determine if different time delays (30 min or 6 h) between training and a post-training test with a rhythmic bimanual pattern (90° relative phase) would be associated with different levels of consolidation for the motor and spatial representations of the pattern; and (2) determine ... Read more >>

Exp Brain Res (Experimental brain research)
[2020, :]

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Effects of Repetitive Transcranial Magnetic Stimulation (rTMS) Combined with Aerobic Exercise on the Recovery of Motor Function in Ischemic Stroke Rat Model.

Juanxiu Cui, Cuk-Seong Kim, Yeongwook Kim, Min Kyun Sohn, Sungju Jee,

The therapeutic benefits of repetitive transcranial magnetic stimulation (rTMS) combined with rehabilitation therapy on recovery after stroke have not been fully elucidated. This study aimed to explore the therapeutic effects of rTMS followed by aerobic exercise on neuroplasticity and recovery of motor function in a rat model of permanent middle ... Read more >>

Brain Sci (Brain sciences)
[2020, 10(3):]

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Alterations of hand sensorimotor function and cortical motor representations over the adult lifespan.

Melina Hehl, Stephan P Swinnen, Koen Cuypers,

Using a cross sectional design, we aimed to identify the effect of aging on sensorimotor function and cortical motor representations of two intrinsic hand muscles, as well as the course and timing of those changes. Furthermore, the link between cortical motor representations, sensorimotor function, and intracortical inhibition and facilitation was ... Read more >>

Aging (Albany NY) (Aging)
[2020, 12(5):4617-4640]

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