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Takano K, Yamaguchi T, Kikuma K, Okuyama K, Katagiri N, Sato T, Tanabe S, Kondo K, Fujiwara T. Transcutaneous spinal cord stimulation phase-dependently modulates spinal reciprocal inhibition induced by pedaling in healthy individuals. Exp Brain Res 2024; 242:2645-2652. [PMID: 39331051 DOI: 10.1007/s00221-024-06926-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Accepted: 09/09/2024] [Indexed: 09/28/2024]
Abstract
Reciprocal inhibition (RI) between leg muscles is crucial for smooth movement. Pedaling is a rhythmic movement that can increase RI in healthy individuals. Transcutaneous spinal cord stimulation (tSCS) stimulates spinal neural circuits by targeting the afferent fibers. Pedaling with simultaneous tSCS may modulate the plasticity of the spinal neural circuit and alter neural activity based on movement and muscle engagement. This study investigated the RI changes after pedaling and tSCS and determined the phase of pedaling in which tSCS should be applied for optimal RI modulation in healthy individuals. Eleven subjects underwent three interventions: pedaling combined with tSCS during the early phase of lower extension (phase 1), pedaling combined with tSCS during the late phase of lower flexion (phase 4) of the pedaling cycle, and pedaling combined with sham tSCS. The RI from the tibialis anterior to the soleus muscle was assessed before, immediately after, 15 min, and 30 min after the intervention. RI increased immediately after phase 4 and pedaling combined with sham tSCS, whereas no changes were observed after phase 1. These results demonstrate that tSCS modulates RI changes induced by pedaling in a stimulus phase-dependent manner in healthy individuals. However, the mechanism involved in this intervention needs to be explored to achieve higher efficacy.
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Affiliation(s)
- Keita Takano
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Chiba, Japan
| | - Tomofumi Yamaguchi
- Department of Physical Therapy, Juntendo University, Faculty of Health Science, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
- Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Kano Kikuma
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Chiba, Japan
| | - Kohei Okuyama
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Chiba, Japan
| | - Natsuki Katagiri
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Chiba, Japan
| | - Takatsugu Sato
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Chiba, Japan
| | - Shigeo Tanabe
- Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Aichi, Japan
| | - Kunitsugu Kondo
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Chiba, Japan
| | - Toshiyuki Fujiwara
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Physical Therapy, Juntendo University, Faculty of Health Science, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
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Murakami Y, Honaga K, Kono H, Haruyama K, Yamaguchi T, Tani M, Isayama R, Takakura T, Tanuma A, Hatori K, Wada F, Fujiwara T. New Artificial Intelligence-Integrated Electromyography-Driven Robot Hand for Upper Extremity Rehabilitation of Patients With Stroke: A Randomized, Controlled Trial. Neurorehabil Neural Repair 2023; 37:298-306. [PMID: 37039319 DOI: 10.1177/15459683231166939] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
BACKGROUND An artificial intelligence (AI)-integrated electromyography (EMG)-driven robot hand was devised for upper extremity (UE) rehabilitation. This robot detects patients' intentions to perform finger extension and flexion based on the EMG activities of 3 forearm muscles. OBJECTIVE This study aimed to assess the effect of this robot in patients with chronic stroke. METHODS This was a single-blinded, randomized, controlled trial with a 4-week follow-up period. Twenty patients were assigned to the active (n = 11) and control (n = 9) groups. Patients in the active group received 40 minutes of active finger training with this robot twice a week for 4 weeks. Patients in the control group received passive finger training with the same robot. The Fugl-Meyer assessment of UE motor function (FMA), motor activity log-14 amount of use score (MAL-14 AOU), modified Ashworth scale (MAS), H reflex, and reciprocal inhibition were assessed before, post, and post-4 weeks (post-4w) of intervention. RESULTS FMA was significantly improved at both post (P = .011) and post-4w (P = .021) in the active group. The control group did not show significant improvement in FMA at the post. MAL-14 AOU was improved at the post in the active group (P = .03). In the active group, there were significant improvements in wrist MAS at post (P = .024) and post-4w (P = .026). CONCLUSIONS The AI-integrated EMG-driven robot improved UE motor function and spasticity, which persisted for 4 weeks. This robot hand might be useful for UE rehabilitation of patients with stroke.Clinical Trial Registry Name: The effect of robotic rehabilitation using XMM-HR2 for the paretic upper extremity among hemiparetic patients with stroke.Clinical Trial Registration-URL: https://jrct.niph.go.jp/Unique Identifier: jRCTs032200045.
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Affiliation(s)
- Yuhei Murakami
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kaoru Honaga
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hidemi Kono
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Koshiro Haruyama
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Physical Therapy, Juntendo University Faculty of Health Science, Tokyo, Japan
| | - Tomofumi Yamaguchi
- Department of Physical Therapy, Juntendo University Faculty of Health Science, Tokyo, Japan
| | - Mami Tani
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Reina Isayama
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Tomokazu Takakura
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Akira Tanuma
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kozo Hatori
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Futoshi Wada
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Physical Therapy, Juntendo University Faculty of Health Science, Tokyo, Japan
| | - Toshiyuki Fujiwara
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Physical Therapy, Juntendo University Faculty of Health Science, Tokyo, Japan
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Koseki T, Kudo D, Yoshida K, Nito M, Takano K, Jin M, Tanabe S, Sato T, Katoh H, Yamaguchi T. Combined neuromuscular electrical stimulation and transcutaneous spinal direct current stimulation increases motor cortical plasticity in healthy humans. Front Neurosci 2023; 16:1034451. [PMID: 37091256 PMCID: PMC10115158 DOI: 10.3389/fnins.2022.1034451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 12/28/2022] [Indexed: 01/15/2023] Open
Abstract
IntroductionNeuromuscular electrical stimulation (NMES) induces neural plasticity of the central nervous system (CNS) and improves motor function in patients with CNS lesions. However, the extended stimulus duration of NMES reduces its clinical applicability. Transcutaneous spinal direct current stimulation (tsDCS), which increases afferent input, may enhance the effects and reduce the stimulus duration of NMES. This study investigated the excitability of the motor cortex, somatosensory cortex, and spinal motor neurons after the combined stimulation of NMES and tsDCS.MethodsAmong the 55 participants in this study, 24 were allocated to experiment 1, 15 to experiment 2, and 16 to experiment 3. They received intervention for 20 min on different days: (1) NMES combined with tsDCS (NMES + tsDCS), (2) NMES combined with sham tsDCS (NMES + sham tsDCS), and (3) sham NMES combined with tsDCS (sham NMES + tsDCS). NMES was delivered to the right common peroneal nerve at 25 Hz with the intensity at 120% of the motor threshold. For tsDCS, the cathodal electrode was positioned on the thoracic 10th–12th vertebral levels, and the anodal electrode was located on the right shoulder. The stimulus intensity was 2.5 mA. In experiment 1, motor evoked potentials (MEPs) and short-latency intracortical inhibition (SICI) were measured by transcranial magnetic stimulation up to 60 min after stimulation. The spinal motor neurons’ excitability was assessed by recording the posterior root muscle reflex (PRMR) induced via transcutaneous spinal cord stimulation in experiment 2, and the primary somatosensory cortex excitability was evaluated by recording the somatosensory evoked potentials (SEPs) in experiment 3 up to 15 min after stimulation.ResultsCompared to before the stimulation, NMES + tsDCS significantly increased MEP for 60 min or more, and significantly decreased SICI immediately after. Conversely contrast, the PRMR significantly decreased immediately after, and SEPs were unchanged.DiscussionThese results suggest that simultaneous afferent inputs from different stimulus positions critically induce primary motor cortex plasticity. The combined stimulation of NMES with tsDCS may facilitate the development of a new neurorehabilitation technique.
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Affiliation(s)
- Tadaki Koseki
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Daisuke Kudo
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
- Department of Physical Therapy, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Kaito Yoshida
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Mitsuhiro Nito
- Department of Anatomy and Structural Science, Yamagata University School of Medicine, Yamagata, Japan
| | - Keita Takano
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Masafumi Jin
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Shigeo Tanabe
- Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake, Japan
| | - Toshiaki Sato
- Department of Occupational Therapy, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Hiroshi Katoh
- Department of Physical Therapy, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Tomofumi Yamaguchi
- Department of Physical Therapy, Faculty of Health Science, Juntendo University, Tokyo, Japan
- *Correspondence: Tomofumi Yamaguchi,
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Nito M, Katagiri N, Yoshida K, Koseki T, Kudo D, Nanba S, Tanabe S, Yamaguchi T. Repetitive Peripheral Magnetic Stimulation of Wrist Extensors Enhances Cortical Excitability and Motor Performance in Healthy Individuals. Front Neurosci 2021; 15:632716. [PMID: 33679314 PMCID: PMC7930341 DOI: 10.3389/fnins.2021.632716] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 01/26/2021] [Indexed: 11/13/2022] Open
Abstract
Repetitive peripheral magnetic stimulation (rPMS) may improve motor function following central nervous system lesions, but the optimal parameters of rPMS to induce neural plasticity and mechanisms underlying its action remain unclear. We examined the effects of rPMS over wrist extensor muscles on neural plasticity and motor performance in 26 healthy volunteers. In separate experiments, the effects of rPMS on motor evoked potentials (MEPs), short-interval intracortical inhibition (SICI), intracortical facilitation (ICF), direct motor response (M-wave), Hoffmann-reflex, and ballistic wrist extension movements were assessed before and after rPMS. First, to examine the effects of stimulus frequency, rPMS was applied at 50, 25, and 10 Hz by setting a fixed total number of stimuli. A significant increase in MEPs of wrist extensors was observed following 50 and 25 Hz rPMS, but not 10 Hz rPMS. Next, we examined the time required to induce plasticity by increasing the number of stimuli, and found that at least 15 min of 50 and 25 Hz rPMS was required. Based on these parameters, lasting effects were evaluated following 15 min of 50 or 25 Hz rPMS. A significant increase in MEP was observed up to 60 min following 50 and 25 Hz rPMS; similarly, an attenuation of SICI and enhancement of ICF were also observed. The maximal M-wave and Hoffmann-reflex did not change, suggesting that the increase in MEP was due to plastic changes at the motor cortex. This was accompanied by increasing force and electromyograms during wrist ballistic extension movements following 50 and 25 Hz rPMS. These findings suggest that 15 min of rPMS with 25 Hz or more induces an increase in cortical excitability of the relevant area rather than altering the excitability of spinal circuits, and has the potential to improve motor output.
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Affiliation(s)
- Mitsuhiro Nito
- Department of Anatomy and Structural Science, Yamagata University School of Medicine, Yamagata, Japan
| | - Natsuki Katagiri
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Kaito Yoshida
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Tadaki Koseki
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Daisuke Kudo
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Shigehiro Nanba
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | - Shigeo Tanabe
- Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake-shi, Japan
| | - Tomofumi Yamaguchi
- Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, Yamagata, Japan.,Department of Physical Therapy, Faculty of Health Science, Juntendo University, Bunkyo-ku, Japan
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Takahashi Y, Kawakami M, Yamaguchi T, Idogawa Y, Tanabe S, Kondo K, Liu M. Effects of Leg Motor Imagery Combined With Electrical Stimulation on Plasticity of Corticospinal Excitability and Spinal Reciprocal Inhibition. Front Neurosci 2019; 13:149. [PMID: 30846928 PMCID: PMC6393385 DOI: 10.3389/fnins.2019.00149] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 02/08/2019] [Indexed: 12/14/2022] Open
Abstract
Motor imagery (MI) combined with electrical stimulation (ES) enhances upper-limb corticospinal excitability. However, its after-effects on both lower limb corticospinal excitability and spinal reciprocal inhibition remain unknown. We aimed to investigate the effects of MI combined with peripheral nerve ES (MI + ES) on the plasticity of lower limb corticospinal excitability and spinal reciprocal inhibition. Seventeen healthy individuals performed the following three tasks on different days, in a random order: (1) MI alone; (2) ES alone; and (3) MI + ES. The MI task consisted of repetitive right ankle dorsiflexion for 20 min. ES was percutaneously applied to the common peroneal nerve at a frequency of 100 Hz and intensity of 120% of the sensory threshold of the tibialis anterior (TA) muscle. We examined changes in motor-evoked potential (MEP) of the TA (task-related muscle) and soleus muscle (SOL; task-unrelated muscle). We also examined disynaptic reciprocal inhibition before, immediately after, and 10, 20, and 30 min after the task. MI + ES significantly increased TA MEPs immediately and 10 min after the task compared with baseline, but did not change the task-unrelated muscle (SOL) MEPs. MI + ES resulted in a significant increase in the magnitude of reciprocal inhibition immediately and 10 min after the task compared with baseline. MI and ES alone did not affect TA MEPs or reciprocal inhibition. MI combined with ES is effective in inducing plastic changes in lower limb corticospinal excitability and reciprocal Ia inhibition.
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Affiliation(s)
- Yoko Takahashi
- Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan.,Tokyo Bay Rehabilitation Hospital, Chiba, Japan
| | - Michiyuki Kawakami
- Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Tomofumi Yamaguchi
- Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan.,Department of Physical Therapy, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
| | | | - Shigeo Tanabe
- Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake, Japan
| | | | - Meigen Liu
- Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan
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Impaired Ability to Suppress Excitability of Antagonist Motoneurons at Onset of Dorsiflexion in Adults with Cerebral Palsy. Neural Plast 2018; 2018:1265143. [PMID: 30402086 PMCID: PMC6198563 DOI: 10.1155/2018/1265143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 09/14/2018] [Accepted: 09/19/2018] [Indexed: 11/17/2022] Open
Abstract
We recently showed that impaired gait function in adults with cerebral palsy (CP) is associated with reduced rate of force development in ankle dorsiflexors. Here, we explore potential mechanisms. We investigated the suppression of antagonist excitability, calculated as the amount of soleus H-reflex depression at the onset of ankle dorsiflexion compared to rest, in 24 adults with CP (34.3 years, range 18–57; GMFCS 1.95, range 1–3) and 15 healthy, age-matched controls. Furthermore, the central common drive to dorsiflexor motoneurons during a static contraction in the two groups was examined by coherence analyses. The H-reflex was significantly reduced by 37% at the onset of dorsiflexion compared to rest in healthy adults (P < 0.001) but unchanged in adults with CP (P = 0.91). Also, the adults with CP had significantly less coherence. These findings suggest that the ability to suppress antagonist motoneuronal excitability at movement onset is impaired and that the central common drive during static contractions is reduced in adults with CP.
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