1
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Wasaka T, Kano S, Morita Y. Reduction in motor error by presenting subthreshold somatosensory information during visuomotor tracking tasks. Exp Brain Res 2024; 242:2219-2227. [PMID: 39012474 PMCID: PMC11306625 DOI: 10.1007/s00221-024-06887-8] [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: 11/26/2023] [Accepted: 06/26/2024] [Indexed: 07/17/2024]
Abstract
Weak sensory noise acts on the nervous system and promotes sensory and motor functions. This phenomenon is called stochastic resonance and is expected to be applied for improving biological functions. This study investigated the effect of electrical stimulation on grip force adjustment ability. The coefficient of variation and absolute motor error in grip force was measured during a visuomotor tracking task under different intensities of somatosensory noise. Depending on the style of force exertion, the grip movement used in the visuomotor tracking task consisted of force generation (FG), force relaxation (FR), and constant contraction (Constant) phases. The subthreshold condition resulted in significantly lower coefficient of variation in the Constant phase and motor errors in the FG and Constant phases than the no-noise condition. However, the differences among the other conditions were insignificant. Additionally, we examined the correlation between the motor error in the condition without electrical stimulation and the change in motor error induced by subthreshold electrical stimulation. Significant negative correlations were observed in all FG, FR, and Constant phases. These results indicated that somatosensory noise had a strong effect on subjects with large motor errors and enhanced the grip force adjustment ability. By contrast, subjects with small motor errors had weak improvement in motor control. Although the effect of subthreshold noise varies depending on the individual differences, stochastic resonance is effective in improving motor control ability.
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Affiliation(s)
- Toshiaki Wasaka
- Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, 4668555, Japan.
- Center of Biomedical Physics and Information Technology, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, 4668555, Japan.
| | - Shota Kano
- Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, 4668555, Japan
| | - Yoshifumi Morita
- Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, 4668555, Japan
- Center of Biomedical Physics and Information Technology, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, 4668555, Japan
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2
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Pennington A, Ramakrishnan V, Scronce G, Coupland K, Vatinno AA, Seo NJ. Effect of Using TheraBracelet on Grasping versus Reaching in Poststroke Rehabilitation. OTJR-OCCUPATION PARTICIPATION AND HEALTH 2023; 43:702-709. [PMID: 36757086 PMCID: PMC10409869 DOI: 10.1177/15394492231151887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
A peripheral sensory stimulation named TheraBracelet has recently been shown to have a potential to improve gross manual dexterity following stroke. Upper limb function requires both reach and grasp. It is unknown whether TheraBracelet affects one more than other. The objective of this study was to determine whether TheraBracelet improves reaching versus grasping. In a pilot randomized controlled trial, persons with stroke received TheraBracelet (treatment) or no stimulation (control) during task practice therapy (n = 6/group). Effects of TheraBracelet on reaching versus grasping were determined using breakdown of movement times in the Box and Block Test video recordings. Improvements in movement times for the treatment compared with control group were more pronounced for grasping than for reaching at both post and follow-up time points. TheraBracelet may be beneficial for persons with grasping deficits. This knowledge can guide clinicians for targeted use of TheraBracelet, resulting in effective implementation of the new treatment.
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Affiliation(s)
- Allison Pennington
- Division of Occupational Therapy, Department of Rehabilitation Sciences, College of Health Professions, Medical University of South Carolina, Charleston, SC
| | - Viswanathan Ramakrishnan
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC
| | - Gabrielle Scronce
- Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC
| | - Kristen Coupland
- Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC
| | - Amanda A. Vatinno
- Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC
| | - Na Jin Seo
- Division of Occupational Therapy, Department of Rehabilitation Sciences, College of Health Professions, Medical University of South Carolina, Charleston, SC
- Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC
- Ralph H. Johnson VA Medical Center, Charleston, SC
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3
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Endo T, Kim DH, Chamnongthai K. Enhancing Fingertip Tactile Sensitivity by Vibrotactile Noise and Cooling Skin Temperature Effect. IEEE TRANSACTIONS ON HAPTICS 2023; 16:391-399. [PMID: 37506002 DOI: 10.1109/toh.2023.3299575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
This article discusses a method to enhance fingertip tactile sensitivity by applying a vibrotactile noise at the wrist. This is an application of stochastic resonance to the field of haptics. We consider that the tactile sensitivity of the fingertip improves when a sufficiently large noise is propagated to it from the wrist. However, fingertip tactile sensitivity decreases when a large noise that humans can perceive is applied to the wrist. Therefore, in this article, we cool the wrist skin to reduce the wrist's tactile sensitivity to noise. This allows us to apply noise that is large, but still imperceptible, at the wrist and thus to propagate it to the fingertip. On the basis of these procedures, we propose a method to enhance fingertip tactile sensitivity. Further, we carry out several experiments and confirm that the proposed method improves fingertip tactile sensitivity.
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4
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Lakshminarayanan K, Shah R, Daulat SR, Moodley V, Yao Y, Sengupta P, Ramu V, Madathil D. Evaluation of EEG Oscillatory Patterns and Classification of Compound Limb Tactile Imagery. Brain Sci 2023; 13:brainsci13040656. [PMID: 37190621 DOI: 10.3390/brainsci13040656] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 05/17/2023] Open
Abstract
Objective: The purpose of this study was to investigate the cortical activity and digit classification performance during tactile imagery (TI) of a vibratory stimulus at the index, middle, and thumb digits within the left hand in healthy individuals. Furthermore, the cortical activities and classification performance of the compound TI were compared with similar compound motor imagery (MI) with the same digits as TI in the same subjects. Methods: Twelve healthy right-handed adults with no history of upper limb injury, musculoskeletal condition, or neurological disorder participated in the study. The study evaluated the event-related desynchronization (ERD) response and brain-computer interface (BCI) classification performance on discriminating between the digits in the left-hand during the imagery of vibrotactile stimuli to either the index, middle, or thumb finger pads for TI and while performing a motor activity with the same digits for MI. A supervised machine learning technique was applied to discriminate between the digits within the same given limb for both imagery conditions. Results: Both TI and MI exhibited similar patterns of ERD in the alpha and beta bands at the index, middle, and thumb digits within the left hand. While TI had significantly lower ERD for all three digits in both bands, the classification performance of TI-based BCI (77.74 ± 6.98%) was found to be similar to the MI-based BCI (78.36 ± 5.38%). Conclusions: The results of this study suggest that compound tactile imagery can be a viable alternative to MI for BCI classification. The study contributes to the growing body of evidence supporting the use of TI in BCI applications, and future research can build on this work to explore the potential of TI-based BCI for motor rehabilitation and the control of external devices.
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Affiliation(s)
- Kishor Lakshminarayanan
- Neuro-Rehabilitation Lab, Department of Sensors and Biomedical Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Rakshit Shah
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, OH 44115, USA
| | - Sohail R Daulat
- Department of Physiology, University of Arizona College of Medicine, Tucson, AZ 85724, USA
| | - Viashen Moodley
- Arizona Center for Hand to Shoulder Surgery, Phoenix, AZ 85004, USA
| | - Yifei Yao
- Soft Tissue Biomechanics Laboratory, Med-X Research Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Puja Sengupta
- Neuro-Rehabilitation Lab, Department of Sensors and Biomedical Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Vadivelan Ramu
- Neuro-Rehabilitation Lab, Department of Sensors and Biomedical Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Deepa Madathil
- Jindal Institute of Behavioral Sciences, O. P. Jindal Global University, Sonipat 131001, Haryana, India
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5
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Judy LM, Morrow C, Seo NJ. Development and evaluation of an efficient training program to facilitate the adoption of a novel neurorehabilitation device. J Rehabil Assist Technol Eng 2023; 10:20556683231158552. [PMID: 36818163 PMCID: PMC9932764 DOI: 10.1177/20556683231158552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 02/03/2023] [Indexed: 02/16/2023] Open
Abstract
Many rehabilitation devices are not adopted by therapists in practice. One major barrier is therapists' limited time and resources to get training. The objective of this study was to develop/evaluate an efficient training program for a novel rehabilitation device. The program was developed based on structured interviews with seven therapists for training preference and composed of asynchronous and in-person trainings following efficient teaching methods. The training program was evaluated for six occupational therapy doctoral students and six licensed therapists in neurorehabilitation practice. Training effectiveness was evaluated in a simulated treatment session in which 3 trainees shifted their roles among therapist applying the device, client, and peer assessor. In results, 11 of the 12 trainees passed the assessment of using the device in simulated treatment sessions. One trainee did not pass because s/he did not plug in the device to charge at the end. The in-person training fit within 1-h lunch break. All trainees perceived that they could effectively use the device in their practice and both asynchronous and in-person training easily fit into their schedule. This project serves as an example for development of an efficient and effective training program for a novel rehabilitation device to facilitate clinical adoption.
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Affiliation(s)
- Laura M Judy
- Division of Occupational Therapy,
Department of Rehabilitation Sciences, Medical University of South
Carolina, Charleston, SC, USA
| | - Corey Morrow
- Department of Health Sciences and
Research, College of Health Professions, Medical University of South
Carolina, Charleston, SC, USA
| | - Na Jin Seo
- Division of Occupational Therapy,
Department of Rehabilitation Sciences, Medical University of South
Carolina, Charleston, SC, USA,Department of Health Sciences and
Research, College of Health Professions, Medical University of South
Carolina, Charleston, SC, USA,Ralph H. Johnson VA Health Care
System, Charleston, SC, USA,Na J Seo, Division of Occupational Therapy,
Department of Rehabilitation Sciences, Medical University of South Carolina, 77
President Street, Charleston, SC 29425, USA.
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6
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Osumi M, Sumitani M, Otake Y, Nishi Y, Nobusako S, Morioka S. Influence of vibrotactile random noise on the smoothness of the grasp movement in patients with chemotherapy-induced peripheral neuropathy. Exp Brain Res 2023; 241:407-415. [PMID: 36565342 DOI: 10.1007/s00221-022-06532-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 12/12/2022] [Indexed: 12/25/2022]
Abstract
Patients with chemotherapy-induced peripheral neuropathy (CIPN) often suffer from sensorimotor dysfunction of the distal portion of the extremities (e.g., loss of somatosensory sensation, numbness/tingling, difficulty typing on a keyboard, or difficulty buttoning/unbuttoning a shirt). The present study aimed to reveal the effects of subthreshold vibrotactile random noise stimulation on sensorimotor dysfunction in CIPN patients without exacerbating symptoms. Twenty-five patients with CIPN and 28 age-matched healthy adults participated in this study. To reveal the effects of subthreshold vibrotactile random noise stimulation on sensorimotor function, participants were asked to perform a tactile detection task and a grasp movement task during random noise stimulation delivered to the volar and dorsal wrist. We set three intensity conditions of the vibrotactile random noise: 0, 60, and 120% of the sensory threshold (Noise 0%, Noise 60%, and Noise 120% conditions). In the tactile detection task, a Semmes-Weinstein monofilament was applied to the volar surface of the tip of the index finger using standard testing measures. In the grasp movement task, the distance between the thumb and index finger was recorded while the participant attempted to grasp a target object, and the smoothness of the grasp movement was quantified by calculating normalized jerk in each experimental condition. The experimental data were compared using two-way repeated-measures analyses of variance with two factors: experimental condition (Noise 0, 60, 120%) × group (Healthy controls, CIPN patients). The tactile detection threshold and the smoothness of the grasp movement were only improved in the Noise 60% condition without exacerbating numbness/tingling in CIPN patients and healthy controls. The current study suggested that the development of treatment devices using stochastic resonance can improve sensorimotor function for CIPN patients.
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Affiliation(s)
- Michihiro Osumi
- Graduate School of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-Cho, Kitakatsuragi-Gun, Nara, 635-0832, Japan. .,Neurorehabilitation Research Center, Kio University, 4-2-2 Umaminaka, Kitakatsuragi-Gun, Nara, 635-0832, Japan.
| | - Masahiko Sumitani
- Department of Pain and Palliative Medicine, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Yuko Otake
- Department of Physical Therapy, Faculty of Human Care at Makuhari, Tohto University, 1-3 Nakase, Mihamaku, Chiba, 261-850, Japan
| | - Yuki Nishi
- Neurorehabilitation Research Center, Kio University, 4-2-2 Umaminaka, Kitakatsuragi-Gun, Nara, 635-0832, Japan
| | - Satoshi Nobusako
- Graduate School of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-Cho, Kitakatsuragi-Gun, Nara, 635-0832, Japan.,Neurorehabilitation Research Center, Kio University, 4-2-2 Umaminaka, Kitakatsuragi-Gun, Nara, 635-0832, Japan
| | - Shu Morioka
- Graduate School of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-Cho, Kitakatsuragi-Gun, Nara, 635-0832, Japan.,Neurorehabilitation Research Center, Kio University, 4-2-2 Umaminaka, Kitakatsuragi-Gun, Nara, 635-0832, Japan
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7
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Scronce G, Ramakrishnan V, Vatinno AA, Seo NJ. Effect of Self-Directed Home Therapy Adherence Combined with TheraBracelet on Poststroke Hand Recovery: A Pilot Study. Stroke Res Treat 2023; 2023:3682898. [PMID: 36936523 PMCID: PMC10017223 DOI: 10.1155/2023/3682898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 01/26/2023] [Accepted: 02/17/2023] [Indexed: 03/10/2023] Open
Abstract
Hand impairment is a common consequence of stroke, resulting in long-term disability and reduced quality of life. Recovery may be augmented through self-directed therapy activities at home, complemented by the use of rehabilitation devices such as peripheral sensory stimulation. The objective of this study was to determine the effect of adherence to self-directed therapy and the use of TheraBracelet (subsensory random-frequency vibratory stimulation) on hand function for stroke survivors. In a double-blind, randomized controlled pilot trial, 12 chronic stroke survivors were assigned to a treatment or control group (n = 6/group). All participants were instructed to perform 200 repetitions of therapeutic hand tasks 5 days/week while wearing a wrist-worn device 8 hours/day for 4 weeks. The treatment group received TheraBracelet vibration from the device, while the control group received no vibration. Home task repetition adherence and device wear logs, as well as hand function assessment (Stroke Impact Scale Hand domain), were obtained weekly. Repetition adherence was comparable between groups but varied among participants. Participants wore the device to a greater extent than adhering to completing repetitions. A linear mixed model analysis showed a significant interaction between repetition and group (p = 0.01), with greater adherence resulting in greater hand function change for the treatment group (r = 0.94; R 2 = 0.88), but not for the control group. Secondary analysis revealed that repetition adherence was greater for those with lower motor capacity and greater self-efficacy at baseline. This pilot study suggests that adherence to self-directed therapy at home combined with subsensory stimulation may affect recovery outcomes in stroke survivors. This trial is registered with NCT04026399.
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Affiliation(s)
- Gabrielle Scronce
- 1Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC, USA
- 2Ralph H. Johnson VA Health Care System, Charleston, SC, USA
| | - Viswanathan Ramakrishnan
- 3Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Amanda A. Vatinno
- 1Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC, USA
| | - Na Jin Seo
- 1Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, SC, USA
- 2Ralph H. Johnson VA Health Care System, Charleston, SC, USA
- 4Division of Occupational Therapy, Department of Rehabilitation Sciences, College of Health Professions, Medical University of South Carolina, Charleston, SC, USA
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8
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The Effects of Subthreshold Vibratory Noise on Cortical Activity During Motor Imagery. Motor Control 2023:1-14. [PMID: 36801814 DOI: 10.1123/mc.2022-0061] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 12/04/2022] [Accepted: 01/08/2023] [Indexed: 02/19/2023]
Abstract
Previous studies have demonstrated that both visual and proprioceptive feedback play vital roles in mental practice of movements. Tactile sensation has been shown to improve with peripheral sensory stimulation via imperceptible vibratory noise by stimulating the sensorimotor cortex. With both proprioception and tactile sensation sharing the same population of posterior parietal neurons encoding within high-level spatial representations, the effect of imperceptible vibratory noise on motor imagery-based brain-computer interface is unknown. The objective of this study was to investigate the effects of this sensory stimulation via imperceptible vibratory noise applied to the index fingertip in improving motor imagery-based brain-computer interface performance. Fifteen healthy adults (nine males and six females) were studied. Each subject performed three motor imagery tasks, namely drinking, grabbing, and flexion-extension of the wrist, with and without sensory stimulation while being presented a rich immersive visual scenario through a virtual reality headset. Results showed that vibratory noise increased event-related desynchronization during motor imagery compared with no vibration. Furthermore, the task classification percentage was higher with vibration when the tasks were discriminated using a machine learning algorithm. In conclusion, subthreshold random frequency vibration affected motor imagery-related event-related desynchronization and improved task classification performance.
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9
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Schranz C, Vatinno A, Ramakrishnan V, Seo NJ. Neuroplasticity after upper-extremity rehabilitation therapy with sensory stimulation in chronic stroke survivors. Brain Commun 2022; 4:fcac191. [PMID: 35938072 PMCID: PMC9351980 DOI: 10.1093/braincomms/fcac191] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 04/19/2022] [Accepted: 07/21/2022] [Indexed: 01/16/2023] Open
Abstract
This study investigated the effect of using subthreshold vibration as a peripheral sensory stimulation during therapy on cortical activity. Secondary analysis of a pilot triple-blinded randomized controlled trial. Twelve chronic stroke survivors underwent 2-week upper-extremity task-practice therapy. Half received subthreshold vibratory stimulation on their paretic wrist (treatment group) and the other half did not (control). EEG connectivity and event-related de-/resynchronization for the sensorimotor network during hand grip were examined at pre-intervention, post-intervention and follow-up. Statistically significant group by time interactions were observed for both connectivity and event-related spectral perturbation. For the treatment group, connectivity increased at post-intervention and decreased at follow-up. Event-related desynchronization decreased and event-related resynchronization increased at post-intervention, which was maintained at follow-up. The control group had the opposite trend for connectivity and no change in event-related spectral perturbation. The stimulation altered cortical sensorimotor activity. The findings complement the clinical results of the trial in which the treatment group significantly improved gross manual dexterity while the control group did not. Increased connectivity in the treatment group may indicate neuroplasticity for motor learning, while reduced event-related desynchronization and increased event-related resynchronization may indicate lessened effort for grip and improved inhibitory control. EEG may improve understanding of neural processes underlying motor recovery.
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Affiliation(s)
- Christian Schranz
- Correspondence to: Christian Schranz, PhD 77 President Street, Charleston SC 29425, USA E-mail:
| | - Amanda Vatinno
- Department of Health Sciences and Research, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Viswanathan Ramakrishnan
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Na Jin Seo
- Department of Health Sciences and Research, Medical University of South Carolina, Charleston, SC 29425, USA,Department of Rehabilitation Sciences, Medical University of South Carolina, Charleston, SC 29425, USA,Ralph H. Johnson VA Medical Center, Charleston, SC 29401, USA
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10
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Rodríguez-Pérez MP, Sánchez-Herrera-Baeza P, Cano-de-la-Cuerda R, Camacho-Montaño LR, Serrada-Tejeda S, Pérez-de-Heredia-Torres M. Effects of Intensive Vibratory Treatment with a Robotic System on the Recovery of Sensation and Function in Patients with Subacute and Chronic Stroke: A Non-Randomized Clinical Trial. J Clin Med 2022; 11:jcm11133572. [PMID: 35806854 PMCID: PMC9267489 DOI: 10.3390/jcm11133572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/20/2022] [Accepted: 06/20/2022] [Indexed: 02/08/2023] Open
Abstract
Background: Sensory–motor deficits are frequent and affect the functionality after stroke. The use of robotic systems to improve functionality and motor performance is advisable; therefore, the aim of the present study was to evaluate the effects of intensive, high-frequency vibration treatment administered with a robotic system in subacute and chronic stroke patients in terms of upper limb sensitivity, motor function, quantity and quality of movement, and quality of life. Methods: A simple-blind, non-randomized controlled trial was conducted. The control group received conventional rehabilitation treatment and the experimental group received robotic treatment with an Amadeo® robot in addition to their conventional rehabilitation sessions. Results: Intragroup analysis identified significant improvements in the experimental group in hand (p = 0.012), arm (p = 0.018), and shoulder (p = 0.027) sensitivity, as well as in motor function (FMA-UEmotor function, p = 0.028), integration of the affected limb (MAL-14amount scale, p = 0.011; MAL-14How well scale, p = 0.008), and perceived quality of life (SIS-16, p = 0.008). The measures between the control and experimental groups showed statistically significant differences in motor performance and spontaneous use of the affected limb (MAL-14amount scale, p = 0.021; MAL-14How well scale, p = 0.037). Conclusions: Intensive, high-frequency vibration with a robotic system, in combination with conventional intervention, improves the recovery of upper limb function in terms of quantity and quality of movement in patients with subacute and chronic stroke.
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11
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Nishi Y, Nobusako S, Tsujimoto T, Sakai A, Nakai A, Morioka S. Spatial Instability during Precision Grip–Lift in Children with Poor Manual Dexterity. Brain Sci 2022; 12:brainsci12050598. [PMID: 35624985 PMCID: PMC9139501 DOI: 10.3390/brainsci12050598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/22/2022] [Accepted: 05/02/2022] [Indexed: 11/18/2022] Open
Abstract
Although children with developmental coordination disorder (DCD) show impaired precision grip control due to a sensory-motor integration deficit, their spatial instability (such as changes in force direction and object roll during a precision grip task) is unclear. Herein, we investigated the spatial instability in the precision grip force control of children with poor manual dexterity. We divided 66 school-aged children who performed a precision gripping and lifting of heavy- or lightweight objects into those with low manual dexterity (n = 11) and those with high manual dexterity (n = 55) as revealed by the Movement Assessment Battery for Children (2nd edition). The group and weight effects were then determined. The results revealed that the total trajectory lengths of the center of pressure (COP) were longer in the lightweight object data of the children in the low-manual-dexterity group and were related to the children’s grip force. The low-manual-dexterity group also showed a shifted COP position from the center of the object in the medial–lateral direction and in the object roll regardless of the object’s weight; these were closely related in both weights’ tests. These results demonstrated that children with poor manual dexterity show spatial instability and different adaptations to the weight of objects during a precision grip task. Further studies are needed to determine whether these findings would be replicated in children with a diagnosis of DCD.
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Affiliation(s)
- Yuki Nishi
- Neurorehabilitation Research Center, Kio University, Koryo, Kitatkatsuragi-gun, Nara 635-0832, Japan; (S.N.); (S.M.)
- Department of Rehabilitation Medicine, Kanmaki, Kitatkatsuragi-gun, Nishiyamato Rehabilitation Hospital, Nara 639-0218, Japan
- Correspondence: ; Tel.: +81-745-54-1601
| | - Satoshi Nobusako
- Neurorehabilitation Research Center, Kio University, Koryo, Kitatkatsuragi-gun, Nara 635-0832, Japan; (S.N.); (S.M.)
- Graduate School of Health Science, Koryo, Kitatkatsuragi-gun, Kio University, Nara 635-0832, Japan
| | - Taeko Tsujimoto
- Department of Rehabilitation, Nishide Clinic, Kashiwara, Osaka 532-0002, Japan;
| | - Ayami Sakai
- Department of Rehabilitation, Higashi Osaka Yamaji Hospital, HigashiOsaka, Osaka 578-0925, Japan;
| | - Akio Nakai
- Graduate School of Clinical Education & The Center for the Study of Child Development, Institute for Education, Mukogawa Women’s University, Nishinomiya, Hyogo 663-8558, Japan;
| | - Shu Morioka
- Neurorehabilitation Research Center, Kio University, Koryo, Kitatkatsuragi-gun, Nara 635-0832, Japan; (S.N.); (S.M.)
- Graduate School of Health Science, Koryo, Kitatkatsuragi-gun, Kio University, Nara 635-0832, Japan
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12
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Seo NJ, Ramakrishnan V, Woodbury ML, Bonilha L, Finetto C, Schranz C, Scronce G, Coupland K, Blaschke J, Baker A, Howard K, Meinzer C, Velozo CA, Adams RJ. Concomitant sensory stimulation during therapy to enhance hand functional recovery post stroke. Trials 2022; 23:262. [PMID: 35382902 PMCID: PMC8981199 DOI: 10.1186/s13063-022-06241-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 03/28/2022] [Indexed: 11/17/2022] Open
Abstract
Background Post-stroke hand impairment is prevalent and persistent even after a full course of rehabilitation. Hand diminishes stroke survivors’ abilities for activities of daily living and independence. One way to improve treatment efficacy is to augment therapy with peripheral sensory stimulation. Recently, a novel sensory stimulation, TheraBracelet, has been developed in which imperceptible vibration is applied during task practice through a wrist-worn device. The objective of this trial is to determine if combining TheraBracelet with hand task practice is superior to hand task practice alone. Methods A double-blind randomized controlled trial will be used. Chronic stroke survivors will undergo a standardized hand task practice therapy program (3 days/week for 6 weeks) while wearing a device on the paretic wrist. The device will deliver TheraBracelet vibration for the treatment group and no vibration for the control group. The primary outcome is hand function measured by the Wolf Motor Function Test. Other outcomes include the Box and Block Test, Action Research Arm Test, upper extremity use in daily living, biomechanical measure of the sensorimotor grip control, and EEG-based neural communication. Discussion This research will determine clinical utility of TheraBracelet to guide future translation. The TheraBracelet stimulation is delivered via a wrist-worn device, does not interfere with hand motion, and can be easily integrated into clinical practice. Enhancing hand function should substantially increase stroke survivors' independence and quality of life and reduce caregiver burden. Trial registration NCT04569123. Registered on September 29, 2020
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Affiliation(s)
- Na Jin Seo
- Department of Rehabilitation Sciences, Department of Health Science and Research, Medical University of South Carolina, 151B Rutledge Ave, MSC 962, Charleston, SC, 29425, USA. .,Ralph H. Johnson VA Medical Center, Charleston, SC, USA. .,Department of Health Science and Research, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC, 29425, USA.
| | - Viswanathan Ramakrishnan
- Department of Public Health Sciences, Medical University of South Carolina, 135 Cannon St, Charleston, SC, 29425, USA
| | - Michelle L Woodbury
- Department of Health Science and Research, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC, 29425, USA
| | - Leonardo Bonilha
- Department of Neurology, Medical University of South Carolina, 96 Jonathan Lucas St, MSC 606, Charleston, SC, 29425, USA
| | - Christian Finetto
- Department of Health Science and Research, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC, 29425, USA
| | - Christian Schranz
- Department of Health Science and Research, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC, 29425, USA
| | - Gabrielle Scronce
- Department of Health Science and Research, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC, 29425, USA
| | - Kristen Coupland
- Department of Health Science and Research, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC, 29425, USA
| | - Jenna Blaschke
- Department of Rehabilitation Sciences, Department of Health Science and Research, Medical University of South Carolina, 151B Rutledge Ave, MSC 962, Charleston, SC, 29425, USA
| | - Adam Baker
- Department of Health Science and Research, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC, 29425, USA
| | - Keith Howard
- Department of Health Science and Research, Medical University of South Carolina, 77 President St, MSC 700, Charleston, SC, 29425, USA
| | - Caitlyn Meinzer
- Department of Public Health Sciences, Medical University of South Carolina, 135 Cannon St, Charleston, SC, 29425, USA
| | - Craig A Velozo
- Department of Rehabilitation Sciences, Department of Health Science and Research, Medical University of South Carolina, 151B Rutledge Ave, MSC 962, Charleston, SC, 29425, USA
| | - Robert J Adams
- Department of Neurology, Medical University of South Carolina, 96 Jonathan Lucas St, MSC 606, Charleston, SC, 29425, USA
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13
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Meade ZS, Likens AD, Kent JA, Takahashi KZ, Wurdeman SR, Jacobsen AL, Hernandez ME, Stergiou N. Subthreshold Vibration Influences Standing Balance but Has Unclear Impact on Somatosensation in Persons With Transtibial Amputations. Front Physiol 2022; 13:810079. [PMID: 35185618 PMCID: PMC8847287 DOI: 10.3389/fphys.2022.810079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 01/10/2022] [Indexed: 11/13/2022] Open
Abstract
Stochastic resonance has been successfully used to improve human movement when using subthreshold vibration. Recent work has shown promise in improving mobility in individuals with unilateral lower limb amputations. Furthering this work, we present an investigation of two different signal structures in the use of stochastic resonance to improve mobility in individuals with unilateral lower limb amputations. Cutaneous somatosensation and standing balance measures using spatial and temporal analysis were assessed. There were no differences in the somatosensation measures, but differences in the temporal characteristics of the standing measures were seen with the various vibration structures when compared to no vibration, one of which suggesting mass may play an important role in determining who may or may not benefit from this intervention. Stochastic resonance employed with subthreshold vibration influences mobility in individuals with unilateral amputations, but the full direction and extent of influence is yet to be understood.
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Affiliation(s)
- Zachary S. Meade
- Carle Illinois College of Medicine, University of Illinois Urbana-Champaign, Urbana, IL, United States
- Department of Biomechanics, University of Nebraska Omaha, Omaha, NE, United States
| | - Aaron D. Likens
- Department of Biomechanics, University of Nebraska Omaha, Omaha, NE, United States
| | - Jenny A. Kent
- Department of Biomechanics, University of Nebraska Omaha, Omaha, NE, United States
- Department of Physical Therapy, University of Nevada, Las Vegas, Las Vegas, NV, United States
| | - Kota Z. Takahashi
- Department of Biomechanics, University of Nebraska Omaha, Omaha, NE, United States
| | - Shane R. Wurdeman
- Clinical and Scientific Affairs, Hanger Clinic, Austin, TX, United States
| | - Adam L. Jacobsen
- Prosthetics and Sensory Aids, Veterans Affairs Medical Center, Omaha, NE, United States
| | - Manuel E. Hernandez
- Department of Kinesiology and Community Health, College of Applied Health Sciences, University of Illinois Urbana-Champaign, Urbana, IL, United States
| | - Nick Stergiou
- Department of Biomechanics, University of Nebraska Omaha, Omaha, NE, United States
- *Correspondence: Nick Stergiou,
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14
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Blaschke J, Vatinno A, Scronce G, Ramakrishnan V, Seo NJ. Effect of Sensory Impairment on Hand Functional Improvement with Therapy and Sensory Stimulation. NEUROLOGY AND NEUROREHABILITATION 2022; 4:1-4. [PMID: 36780248 PMCID: PMC9918228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Sensory impairment may impact individual stroke survivors' motor recovery as well as their response to peripheral sensory stimulation treatment. The objective of this study was to determine the effect of sensory impairment level of individual stroke survivors on motor improvement with therapy and peripheral sensory stimulation. A secondary analysis of a pilot triple-blind randomized controlled trial was used. Twelve chronic stroke survivors were randomly assigned to the treatment group receiving peripheral sensory stimulation or the control group receiving no stimulation during 2-week hand task practice therapy. Sensory impairment level was quantified as the pre-intervention sensory threshold. Motor improvement was assessed as change in the Box and Block Test score from pre- to post-intervention. The association between sensory impairment level and motor improvement was examined using a regression analysis, accounting for groups. This study found that participants with better sensation (i.e., with lower sensory threshold) had better motor improvement than patients with worse sensation (i.e., with higher sensory threshold). Sensory impairment level did not alter the effect of peripheral sensory stimulation. These findings suggest that the level of sensory impairment may predict recovery potentials and direct rehabilitation treatment for stroke survivors.
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Affiliation(s)
- Jenna Blaschke
- Department of Rehabilitation Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Amanda Vatinno
- Department of Health Science and Research, Medical University of South Carolina, Charleston, SC, USA
| | - Gabrielle Scronce
- Department of Health Science and Research, Medical University of South Carolina, Charleston, SC, USA
| | | | - Na Jin Seo
- Department of Rehabilitation Sciences, Medical University of South Carolina, Charleston, SC, USA,Department of Health Science and Research, Medical University of South Carolina, Charleston, SC, USA,Ralph H. Johnson VA Medical Center, Charleston, SC, USA
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15
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Vatinno AA, Hall L, Cox H, Fluharty A, Taylor C, Wease A, Davis A, Cain S, Ramakrishnan V, Woodbury M, Seo NJ. Using Subthreshold Vibratory Stimulation During Poststroke Rehabilitation Therapy: A Case Series. OTJR-OCCUPATION PARTICIPATION AND HEALTH 2022; 42:30-39. [PMID: 34496711 PMCID: PMC8720500 DOI: 10.1177/15394492211042275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Subthreshold vibratory stimulation to the paretic wrist has been shown to prime the sensorimotor cortex and improve 2-week upper extremity (UE) therapy outcomes. The objective of this work was to determine feasibility, safety, and preliminary efficacy of the stimulation over a typical 6-week therapy duration. Four chronic stroke survivors received stimulation during 6-week therapy. Feasibility/safety/efficacy were assessed at baseline, posttherapy, and 1-month follow-up. For feasibility, all participants wore the device throughout therapy and perceived the stimulation comfortable/safe. Regarding safety, no serious/moderate intervention-related adverse events occurred. For efficacy, all participants improved in Wolf Motor Function Test and UE use in daily living based on accelerometry and stroke impact scale. Mean improvements at posttherapy/follow-up were greater than the minimal detectable change/clinically important difference and other trials with similar therapy without stimulation. In conclusion, the stimulation was feasible/safe for 6-week use. Preliminary efficacy encourages a larger trial to further evaluate the stimulation as a therapy adjunct.
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Affiliation(s)
- Amanda A. Vatinno
- Department of Health Sciences and Research, Medical University of South Carolina (MUSC), Charleston, SC
| | - Lucion Hall
- Division of Occupational Therapy, Department of Health Professions, MUSC
| | - Hannah Cox
- Division of Occupational Therapy, Department of Health Professions, MUSC
| | - Alison Fluharty
- Division of Occupational Therapy, Department of Health Professions, MUSC
| | - Catilyn Taylor
- Division of Occupational Therapy, Department of Health Professions, MUSC
| | - Alexandra Wease
- Division of Occupational Therapy, Department of Health Professions, MUSC
| | - Allison Davis
- Division of Occupational Therapy, Department of Health Professions, MUSC
| | - Shannon Cain
- Division of Occupational Therapy, Department of Health Professions, MUSC
| | | | - Michelle Woodbury
- (1) Division of Occupational Therapy, Department of Health Professions, MUSC,(2) Department of Health Sciences and Research, MUSC
| | - Na Jin Seo
- (1) Division of Occupational Therapy, Department of Health Professions, MUSC,(2) Department of Health Sciences and Research, MUSC,(3) Ralph H. Johnson VA Medical Center
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16
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Niwa K, Tanaka Y, Kitamichi K, Kuhara T, Uemura K, Saito T. Vibrotactile Feedback System From the Fingertip to the Temples for Perceptual Enhancement of Contracture Palpation. IEEE TRANSACTIONS ON HAPTICS 2021; 14:285-290. [PMID: 33939613 DOI: 10.1109/toh.2021.3076501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Contractures are generally assessed by a physician or physical therapist through palpation. However, contracture palpation requires skill and experience. The frictional vibration, which has a pulse-like vibration due to sliding disturbances around the affected area during palpation, is important in assessing the degree of contracture progression. This paper aims to enhance the perceptual sensitivity of frictional vibration for contracture palpation using a vibrotactile feedback system. We previously proposed an evaluation system for palpation with a wearable skin vibration sensor that detects skin-propagated vibration, allowing touch with a bare fingertip. In this paper, we propose the vibrotactile feedback system that presents the tactile information of the fingertip detected by the wearable tactile sensor to the temples with a vibrotactile display. A stimulator that gives vibrations similar to those during the palpation, which include pulse-like vibration and small vibration, was assembled. Then, psychophysical experiments on the vibrotactile feedback system were conducted using this stimulator. The results showed that the detection sensitivity of the pulse-like vibration was significantly enhanced with the feedback.
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17
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Nobusako S, Osumi M, Matsuo A, Furukawa E, Maeda T, Shimada S, Nakai A, Morioka S. Influence of Stochastic Resonance on Manual Dexterity in Children With Developmental Coordination Disorder: A Double-Blind Interventional Study. Front Neurol 2021; 12:626608. [PMID: 33859606 PMCID: PMC8042204 DOI: 10.3389/fneur.2021.626608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 03/08/2021] [Indexed: 11/13/2022] Open
Abstract
Background: There is increasing evidence that the stochastic resonance (SR) phenomenon provided by subthreshold mechanical noise stimulation improves the sensory-motor system. However, the effect of SR on children with developmental coordination disorder (DCD) is unclear. The purpose of this study was to assess whether SR activated by subthreshold vibrotactile noise stimulation of the wrist influences manual dexterity in children with DCD. Methods: A double-blind interventional study was conducted. Participants were 30 children (age: 9.3 ± 1.44 years, range 6–11 years; 27 male, three female; 25 right-handed, five left-handed) meeting DCD diagnostic criteria in DSM-5. The manual dexterity test was administered the day before SR intervention (baseline-data). SR was elicited using subthreshold vibrotactile noise stimulation at 60% of the vibrotactile threshold measured at the wrist. SR was delivered two times and the manual dexterity test was administered during each SR stimulation block (SR-on condition) and after each SR stimulation block (SR-off), for a total of four measurements. Target outcomes were the component score, the standard score, and the percentile score of the manual dexterity test. Results: The manual dexterity test scores in the SR-on condition were significantly improved compared to scores at the baseline and in the SR-off condition (p < 0.001). Conclusions: The present study showed that subthreshold noise stimulation eliciting SR significantly improved manual dexterity outcomes in children with DCD during stimulation but not after stimulation. Future studies will need to investigate the carry-over effects of SR stimulation.
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Affiliation(s)
- Satoshi Nobusako
- Neurorehabilitation Research Center, Kio University , Kitakatsuragi-gun, Japan.,Graduate School of Health Science, Kio University, Kitakatsuragi-gun, Japan
| | - Michihiro Osumi
- Neurorehabilitation Research Center, Kio University , Kitakatsuragi-gun, Japan.,Graduate School of Health Science, Kio University, Kitakatsuragi-gun, Japan
| | - Atsushi Matsuo
- Neurorehabilitation Research Center, Kio University , Kitakatsuragi-gun, Japan.,Graduate School of Health Science, Kio University, Kitakatsuragi-gun, Japan
| | - Emi Furukawa
- Neurorehabilitation Research Center, Kio University , Kitakatsuragi-gun, Japan.,Faculty of Nursing, University of Hyogo, Akashi, Japan
| | - Takaki Maeda
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Sotaro Shimada
- Department of Electronics and Bioinformatics School of Science and Technology, Meiji University, Kawasaki, Japan
| | - Akio Nakai
- Graduate School of Clinical Education & The Center for the Study of Child Development, Institute for Education, Mukogawa Women's University, Nishinomiya, Japan
| | - Shu Morioka
- Neurorehabilitation Research Center, Kio University , Kitakatsuragi-gun, Japan.,Graduate School of Health Science, Kio University, Kitakatsuragi-gun, Japan
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18
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Saito K, Otsuru N, Yokota H, Inukai Y, Miyaguchi S, Kojima S, Onishi H. α-tACS over the somatosensory cortex enhances tactile spatial discrimination in healthy subjects with low alpha activity. Brain Behav 2021; 11:e02019. [PMID: 33405361 PMCID: PMC7994706 DOI: 10.1002/brb3.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 10/28/2020] [Accepted: 12/17/2020] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Spontaneous oscillations in the somatosensory cortex, especially of the alpha (8 - 14 Hz) and gamma (60 - 80 Hz) frequencies, affect tactile perception; moreover, these oscillations can be selectively modulated by frequency-matched transcranial alternating current stimulation (tACS) on the basis of ongoing oscillatory brain activity. To examine whether tACS can actually improve tactile perception via alpha and gamma modulation, we measured the effects of 10-Hz and 70-Hz tACS (α- and γ-tACS) on the left somatosensory cortex on right-finger tactile spatial orientation discrimination, and the associations between performance changes and individual alpha and gamma activities. METHODS Fifteen neurologically healthy subjects were recruited into this study. Electroencephalography (EEG) was performed before the first day, to assess the normal alpha- and gamma-activity levels. A grating orientation discrimination task was performed before and during 10-Hz and 70-Hz tACS. RESULTS The 10-Hz tACS protocol decreased the grating orientation discrimination threshold, primarily in subjects with low alpha event-related synchronization (ERS). In contrast, the 70-Hz tACS had no effect on the grating orientation discrimination threshold. CONCLUSIONS This study showed that 10-Hz tACS can improve tactile orientation discrimination in subjects with low alpha activity. Alpha-frequency tACS may help identify the contributions of these oscillations to other neurophysiological and pathological processes.
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Affiliation(s)
- Kei Saito
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.,Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Naofumi Otsuru
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.,Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Hirotake Yokota
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.,Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Yasuto Inukai
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.,Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Shota Miyaguchi
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.,Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Sho Kojima
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.,Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Hideaki Onishi
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.,Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
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19
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Nobusako S, Osumi M, Furukawa E, Nakai A, Maeda T, Morioka S. Increased visual bias in children with developmental coordination disorder: Evidence from a visual-tactile temporal order judgment task. Hum Mov Sci 2020; 75:102743. [PMID: 33341403 DOI: 10.1016/j.humov.2020.102743] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND Previous studies have suggested that children with developmental coordination disorder (DCD) rely heavily on vision to perform movements, which may contribute to their clumsy movements. However, few studies have objectively and quantitatively investigated the perceptual biases of children with DCD. METHODS A visual-tactile temporal order judgment (TOJ) task was used to measure and compare the perceptual biases of 19 children with DCD and 19 age- and sex-matched typically developing children. The point of subjective equality, which demonstrates when "visual first" and "tactile first" judgment probabilities are equal (50%), obtained by analyzing the results of the visual-tactile TOJ task, was used as an indicator of perceptual biases. Further, variables (age and manual dexterity in all participants; motor function, autism spectrum disorder and attention-deficit hyperactivity disorder traits, and depressive symptoms in children with DCD) associated with perceptual biases were examined with correlation analysis. RESULTS Children with DCD had significantly stronger visual bias than typically developing children. Overall correlation analysis showed that increased visual bias was significantly correlated with poor manual dexterity. CONCLUSION Children with DCD had a strong visual bias, which was associated with poor manual dexterity.
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Affiliation(s)
- Satoshi Nobusako
- Neurorehabilitation Research Center, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan; Graduate School of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan.
| | - Michihiro Osumi
- Neurorehabilitation Research Center, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan; Graduate School of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
| | - Emi Furukawa
- Neurorehabilitation Research Center, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
| | - Akio Nakai
- Graduate School of Clinical Education & The Center for the Study of Child Development, Institute for Education, Mukogawa Women's University, 6-46 Ikebiraki-cho, Nishinomiya-city, Hyogo 663-8558, Japan
| | - Takaki Maeda
- Department of Neuropsychiatry, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Shu Morioka
- Neurorehabilitation Research Center, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan; Graduate School of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
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20
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Nobusako S, Osumi M, Matsuo A, Furukawa E, Maeda T, Shimada S, Nakai A, Morioka S. Subthreshold Vibrotactile Noise Stimulation Immediately Improves Manual Dexterity in a Child With Developmental Coordination Disorder: A Single-Case Study. Front Neurol 2019; 10:717. [PMID: 31312179 PMCID: PMC6614204 DOI: 10.3389/fneur.2019.00717] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/17/2019] [Indexed: 01/13/2023] Open
Abstract
Developmental coordination disorder (DCD) is the most common childhood movement disorder. It is characterized by clumsiness of fine and gross motor skills in developing children. Children with DCD have low ability to effectively use tactile information for movements, instead relying on visual information. In addition, children with DCD have deficits in visuo-motor temporal integration, which is important in motor control. These traits subsequently lead to clumsiness of movements. Conversely, however, imperceptible vibrotactile noise stimulation (at 60%-intensity of the sensory threshold) to the wrist provides stochastic resonance (SR) phenomenon to the body, improving the sensory and motor systems. However, the effects of SR have not yet been validated in children with DCD. Thus, we conducted a single case study of a 10-year-old boy with a diagnosis of DCD to investigate the effect of SR on visual dependence, visuo-motor temporal integration, and manual dexterity. SR was provided by vibrotactile noise stimulation (at an intensity of 60% of the sensory threshold) to the wrist. Changes in manual dexterity (during the SR on- and off-conditions) were measured using the manual dexterity test of the Movement Assessment Battery for Children-2nd edition. The point of subjective equality measured by visual or tactile temporal order judgment task served as a quantitative indicator reflecting specific sensory dependence. The delay detection threshold and steepness of delay detection probability curve, which were measured using the delayed visual feedback detection task, were used as quantitative indicators of visuo-motor temporal integration. The results demonstrated alleviated visual dependence and improved visuo-motor temporal integration during the SR on-conditions rather than the SR off-conditions. Most importantly, manual dexterity during the SR on-conditions was significantly improved compared to that during the SR off-conditions. Thus, the present results highlighted that SR could contribute to improving poor movement in children with DCD. However, since this was a single case study, a future interventional study with a large sample size is needed to determine the effectiveness of SR for children with DCD.
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Affiliation(s)
- Satoshi Nobusako
- Neurorehabilitation Research Center, Kio University, Koryo, Japan.,Graduate School of Health Science, Kio University, Koryo, Japan
| | - Michihiro Osumi
- Neurorehabilitation Research Center, Kio University, Koryo, Japan.,Graduate School of Health Science, Kio University, Koryo, Japan
| | - Atsushi Matsuo
- Neurorehabilitation Research Center, Kio University, Koryo, Japan.,Graduate School of Health Science, Kio University, Koryo, Japan.,Department of Physical Therapy, Faculty of Health Sciences, Kio University, Koryo, Japan
| | - Emi Furukawa
- Neurorehabilitation Research Center, Kio University, Koryo, Japan
| | - Takaki Maeda
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Sotaro Shimada
- Department of Electronics and Bioinformatics School of Science and Technology, Meiji University, Kawasaki, Japan
| | - Akio Nakai
- Graduate School of Clinical Education & The Center for the Study of Child Development, Institute for Education, Mukogawa Women's University, Nishinomiya, Japan
| | - Shu Morioka
- Neurorehabilitation Research Center, Kio University, Koryo, Japan.,Graduate School of Health Science, Kio University, Koryo, Japan.,Department of Physical Therapy, Faculty of Health Sciences, Kio University, Koryo, Japan
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21
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The effects of sub-threshold vibratory noise on visuomotor entrainment during human walking and standing in a virtual reality environment. Hum Mov Sci 2019; 66:587-599. [PMID: 31255870 PMCID: PMC6934930 DOI: 10.1016/j.humov.2019.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 06/13/2019] [Accepted: 06/14/2019] [Indexed: 01/25/2023]
Abstract
Humans will naturally synchronize their posture to the motion of a visual surround, but it is unclear if this visuomotor entrainment can be attenuated with an increased sensitivity to somatosensory information. Sub-threshold vibratory noise applied to the Achilles tendons has proven to enhance ankle proprioception through the phenomenon of stochastic resonance. Our purpose was to compare visuomotor entrainment during walking and standing, and to understand how this entrainment might be attenuated by applying sub-threshold vibratory noise over the Achilles tendons. We induced visuomotor entrainment during standing and treadmill walking for ten subjects (24.5 ± 2.9 years) using a speed-matched virtual hallway with continuous mediolateral perturbations at three different frequencies. Vibrotactile motors over the Achilles tendons provided noise (0-400 Hz) with an amplitude set to 90% of each participant's sensory threshold. Mediolateral sacrum, C7, and head motion was greatly amplified (4-8× on average) at the perturbation frequencies during walking, but was much less pronounced during standing. During walking, individuals with greater mediolateral head motion at the fastest perturbation frequency saw the greatest attenuation of that motion with applied noise. Similarly, during standing, individuals who exhibited greater postural sway (as measured by the center of pressure) also saw the greatest reductions in sway with sub-threshold noise applied in three of our summary metrics. Our results suggest that, at least for healthy young adults, sub-threshold vibratory noise over the Achilles tendons can slightly improve postural control during disruptive mediolateral visual perturbations, but the applied noise does not substantially attenuate visuomotor entrainment during walking or standing.
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22
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Sinusoidal vibrotactile stimulation differentially improves force steadiness depending on contraction intensity. Med Biol Eng Comput 2019; 57:1813-1822. [DOI: 10.1007/s11517-019-01999-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 05/29/2019] [Indexed: 01/25/2023]
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Seo NJ, Lakshminarayanan K, Lauer AW, Ramakrishnan V, Schmit BD, Hanlon CA, George MS, Bonilha L, Downey RJ, DeVries W, Nagy T. Use of imperceptible wrist vibration to modulate sensorimotor cortical activity. Exp Brain Res 2019; 237:805-816. [PMID: 30607471 PMCID: PMC6613561 DOI: 10.1007/s00221-018-05465-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 12/21/2018] [Indexed: 11/24/2022]
Abstract
Peripheral sensory stimulation has been used as a method to stimulate the sensorimotor cortex, with applications in neurorehabilitation. To improve delivery modality and usability, a new stimulation method has been developed in which imperceptible random-frequency vibration is applied to the wrist concurrently during hand activity. The objective of this study was to investigate effects of this new sensory stimulation on the sensorimotor cortex. Healthy adults were studied. In a transcranial magnetic stimulation (TMS) study, resting motor threshold, short-interval intracortical inhibition, and intracortical facilitation for the abductor pollicis brevis muscle were compared between vibration on vs. off, while subjects were at rest. In an electroencephalogram (EEG) study, alpha and beta power during rest and event-related desynchronization (ERD) for hand grip were compared between vibration on vs. off. Results showed that vibration decreased EEG power and decreased TMS short-interval intracortical inhibition (i.e., disinhibition) compared with no vibration at rest. Grip-related ERD was also greater during vibration, compared to no vibration. In conclusion, subthreshold random-frequency wrist vibration affected the release of intracortical inhibition and both resting and grip-related sensorimotor cortical activity. Such effects may have implications in rehabilitation.
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Affiliation(s)
- Na Jin Seo
- Department of Health Professions, Medical University of South Carolina, 151B Rutledge Ave., Charleston, SC, 29425, USA.
- Department of Health Sciences and Research, Medical University of South Carolina, Charleston, SC, 29425, USA.
| | - Kishor Lakshminarayanan
- Department of Industrial and Manufacturing Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, 53201, USA
| | - Abigail W Lauer
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Viswanathan Ramakrishnan
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Brian D Schmit
- Department of Biomedical Engineering, Marquette University, Milwaukee, WI, 53233, USA
| | - Colleen A Hanlon
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Mark S George
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Leonardo Bonilha
- Department of Neurology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Ryan J Downey
- Department of Health Professions, Medical University of South Carolina, 151B Rutledge Ave., Charleston, SC, 29425, USA
| | - Will DeVries
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Tibor Nagy
- Department of Chemistry, Appalachian State University, Boone, NC, 28608, USA
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Seo NJ, Woodbury ML, Bonilha L, Ramakrishnan V, Kautz SA, Downey RJ, Dellenbach BHS, Lauer AW, Roark CM, Landers LE, Phillips SK, Vatinno AA. TheraBracelet Stimulation During Task-Practice Therapy to Improve Upper Extremity Function After Stroke: A Pilot Randomized Controlled Study. Phys Ther 2019; 99:319-328. [PMID: 30690609 PMCID: PMC6383710 DOI: 10.1093/ptj/pzy143] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 08/13/2018] [Indexed: 11/12/2022]
Abstract
BACKGROUND Peripheral sensory stimulation has been used in conjunction with upper extremity movement therapy to increase therapy-induced motor gains in patients with stroke. The limitation is that existing sensory stimulation methods typically interfere with natural hand tasks and thus are administered prior to therapy, requiring patients' time commitment. To address this limitation, we developed TheraBracelet. This novel stimulation method provides subthreshold (ie, imperceptible) vibratory stimulation to the wrist and can be used during hand tasks/therapy without interfering with natural hand tasks. OBJECTIVE The objective was to determine the feasibility of using TheraBracelet during therapy to augment motor recovery after stroke. DESIGN The design was a triple-blinded pilot randomized controlled trial. METHODS Twelve chronic stroke survivors were assigned to the treatment or control group. All participants completed 2-hour task practice therapy sessions thrice weekly for 2 weeks. Both groups wore a small vibrator on the paretic wrist, which was turned on to provide TheraBracelet stimulation for the treatment group and turned off for the control group to provide sham stimulation. Outcome measures (Box and Block Test [BBT] and Wolf Motor Function Test [WMFT]) were obtained at baseline, 6 days after therapy, and at follow-up 19 days after therapy. RESULTS The intervention was feasible with no adverse events. The treatment group significantly improved their BBT scores after therapy and at follow-up compared with baseline, whereas the control group did not. For WMFT, the group × time interaction was short of achieving significance. Large effect sizes were obtained (BBT d = 1.43, WMFT d = 0.87). No indication of desensitization to TheraBracelet stimulation was observed. LIMITATIONS The limitation was a small sample size. CONCLUSIONS TheraBracelet could be a promising therapy adjuvant for upper extremity recovery after stroke.
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Affiliation(s)
- Na J Seo
- Division of Occupation Therapy, Department of Health Professions, Department of Health Sciences and Research, Medical University of South Carolina, 151B Rutledge Ave, Charleston, SC 29425 (USA)
| | - Michelle L Woodbury
- Department of Health Sciences and Research, Medical University of South Carolina
| | | | | | - Steven A Kautz
- Department of Health Sciences and Research, Medical University of South Carolina
| | - Ryan J Downey
- Department of Health Professions, Medical University of South Carolina
| | - Blair H S Dellenbach
- Department of Health Sciences and Research, Medical University of South Carolina
| | - Abigail W Lauer
- Department of Public Health Sciences, Medical University of South Carolina
| | - Caroline M Roark
- Division of Occupational Therapy, Medical University of South Carolina
| | - Lauren E Landers
- Division of Occupational Therapy, Medical University of South Carolina
| | - Sarah K Phillips
- Division of Occupational Therapy, Medical University of South Carolina
| | - Amanda A Vatinno
- College of Health Professions, Medical University of South Carolina
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White O, Babič J, Trenado C, Johannsen L, Goswami N. The Promise of Stochastic Resonance in Falls Prevention. Front Physiol 2019; 9:1865. [PMID: 30745883 PMCID: PMC6360177 DOI: 10.3389/fphys.2018.01865] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 12/11/2018] [Indexed: 12/13/2022] Open
Abstract
Multisensory integration is essential for maintenance of motor and cognitive abilities, thereby ensuring normal function and personal autonomy. Balance control is challenged during senescence or in motor disorders, leading to potential falls. Increased uncertainty in sensory signals is caused by a number of factors including noise, defined as a random and persistent disturbance that reduces the clarity of information. Counter-intuitively, noise can be beneficial in some conditions. Stochastic resonance is a mechanism whereby a particular level of noise actually enhances the response of non-linear systems to weak sensory signals. Here we review the effects of stochastic resonance on sensory modalities and systems directly involved in balance control. We highlight its potential for improving sensorimotor performance as well as cognitive and autonomic functions. These promising results demonstrate that stochastic resonance represents a flexible and non-invasive technique that can be applied to different modalities simultaneously. Finally we point out its benefits for a variety of scenarios including in ambulant elderly, skilled movements, sports and to patients with sensorimotor or autonomic dysfunctions.
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Affiliation(s)
- Olivier White
- INSERM UMR1093-CAPS, Université Bourgogne Franche-Comté, UFR des Sciences du Sport, Dijon, France.,Acquired Brain Injury Rehabilitation, Faculty of Medicine and Health Sciences, School of Health Sciences, University of East Anglia, Norwich Research Park, Norwich, United Kingdom
| | - Jan Babič
- Laboratory for Neuromechanics and Biorobotics, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Carlos Trenado
- Leibniz Research Centre for Working Environment and Human Factors TU Dortmund (ifADO), Institute of Clinical Neuroscience and Medical Psychology, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Leif Johannsen
- Acquired Brain Injury Rehabilitation, Faculty of Medicine and Health Sciences, School of Health Sciences, University of East Anglia, Norwich Research Park, Norwich, United Kingdom
| | - Nandu Goswami
- Otto Loewi Research Center for Vascular Biology, Immunology and Inflammation, Medical University of Graz, Graz, Austria
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Nobusako S, Osumi M, Matsuo A, Fukuchi T, Nakai A, Zama T, Shimada S, Morioka S. Stochastic resonance improves visuomotor temporal integration in healthy young adults. PLoS One 2018; 13:e0209382. [PMID: 30550570 PMCID: PMC6294379 DOI: 10.1371/journal.pone.0209382] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 12/04/2018] [Indexed: 01/28/2023] Open
Abstract
Mechanical and electrical noise stimulation to the body is known to improve the sensorimotor system. This improvement is related to stochastic resonance (SR), a phenomenon described as a "noise benefit" to various sensory and motor systems. The current study investigated the influence of SR on visuomotor temporal integration and hand motor function under delayed visual feedback in healthy young adults. The purpose of this study was to measure the usefulness of SR as a neurorehabilitation device for disorders of visuomotor temporal integration. Thirty healthy volunteers underwent detection tasks and hand motor function tests under delayed visual feedback, with or without SR. Of the 30 participants, 15 carried out the tasks under delayed visual feedback in the order of SR on-condition, off-condition, off-condition, and on-condition. The remaining 15 participants conducted the experimental tasks in the order of SR off-condition, on-condition, on-condition, and off-condition. Comparisons of the delay detection threshold (DDT), steepness of the delay detection probability curves, box and block test (BBT) scores, and nine-hole peg test (NHPT) scores between the SR on- and off-conditions were performed. The DDT under the SR on-condition was significantly shortened compared with the SR off-condition. There was no significant difference between the SR on- and off-conditions for the steepness of the delay detection probability curves, BBT scores, and NHPT scores. SR improved visuomotor temporal integration in healthy young adults, and may therefore improve movement disorders in patients with impaired visuomotor temporal integration. However, because the current results showed that SR did not improve hand motor function under delayed visual feedback, it may not improve motor function when a large distortion of visuomotor temporal integration is present. Further studies are required considering several limitations of the current study, and future clinical trials are necessary to verify the effects of motor training using SR for the treatment of visuomotor temporal integration disorders.
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Affiliation(s)
- Satoshi Nobusako
- Neurorehabilitation Research Center, Kio University, Nara, Japan
- Graduate School of Health Science, Kio University, Nara, Japan
- * E-mail:
| | - Michihiro Osumi
- Neurorehabilitation Research Center, Kio University, Nara, Japan
- Graduate School of Health Science, Kio University, Nara, Japan
| | - Atsushi Matsuo
- Neurorehabilitation Research Center, Kio University, Nara, Japan
- Graduate School of Health Science, Kio University, Nara, Japan
- Department of Physical Therapy, Faculty of Health Sciences, Kio University, Nara, Japan
| | | | - Akio Nakai
- Graduate School of Clinical Education & The Center for the Study of Child Development, Institute for Education, Mukogawa Women’s University, Hyogo, Japan
| | - Takuro Zama
- Rhythm-Based Brain Information Processing Unit, RIKEN CBS-TOYOTA Collaboration Center, RIKEN Center for Brain Science, Saitama, Japan
| | - Sotaro Shimada
- Department of Electronics and Bioinformatics School of Science and Technology, Meiji University, Kanagawa, Japan
| | - Shu Morioka
- Neurorehabilitation Research Center, Kio University, Nara, Japan
- Graduate School of Health Science, Kio University, Nara, Japan
- Department of Physical Therapy, Faculty of Health Sciences, Kio University, Nara, Japan
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27
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Effects of White Noise Achilles Tendon Vibration on Quiet Standing and Active Postural Positioning. J Appl Biomech 2018; 34:151-158. [PMID: 29139321 DOI: 10.1123/jab.2016-0359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Applying white noise vibration to the ankle tendons has previously been used to improve passive movement detection and alter postural control, likely by enhancing proprioceptive feedback. The aim of the present study was to determine if similar methods focused on the ankle plantarflexors affect the performance of both quiet standing and an active postural positioning task, in which participants may be more reliant on proprioceptive feedback from actively contracting muscles. Twenty young, healthy participants performed quiet standing trials and active postural positioning trials designed to encourage reliance on plantarflexor proprioception. Performance under normal conditions with no vibration was compared to performance with 8 levels of vibration amplitude applied to the bilateral Achilles tendons. Vibration amplitude was set either as a percentage of sensory threshold (n = 10) or by root-mean-square (RMS) amplitude (n = 10). No vibration amplitude had a significant effect on quiet standing. In contrast, accuracy of the active postural positioning task was significantly (P = .001) improved by vibration with an RMS amplitude of 30 μm. Setting vibration amplitude based on sensory threshold did not significantly affect postural positioning accuracy. The present results demonstrate that appropriate amplitude tendon vibration may hold promise for enhancing the use of proprioceptive feedback during functional active movement.
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28
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Enders LR, Seo NJ. Effects of Sensory Deficit on Phalanx Force Deviation During Power Grip Post Stroke. J Mot Behav 2016; 49:55-66. [PMID: 27592686 DOI: 10.1080/00222895.2016.1191416] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The effect of sensory deficits on power grip force from individual phalanges was examined. The authors found that stroke survivors with sensory deficits (determined by the Semmes-Weinstein monofilament test) gripped with phalanx force directed more tangential to the object surface, than those without, although both groups had similar motor deficits (Chedoke-McMaster and Fugl-Meyer), grip strength, and skin friction. Altered grip force direction elevates risk of finger slippage against the object thus grip loss/object dropping, hindering activities of daily living. Altered grip force direction was associated with altered muscle activation patterns. In summary, the motor impairment level alone may not describe hand motor control in detail. Information about sensory deficits helps elucidate patients' hand motor control with functional relevance.
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Affiliation(s)
- Leah R Enders
- a Department of Industrial and Manufacturing Engineering , University of Wisconsin-Milwaukee
| | - Na Jin Seo
- b Division of Occupational Therapy , Department of Health Professions, Department of Health Sciences and Research , Medical University of South Carolina , Charleston
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29
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Lakshminarayanan K, Wang F, Webster JG, Seo NJ. Feasibility and usability of a wearable orthotic for stroke survivors with hand impairment. Disabil Rehabil Assist Technol 2016; 12:175-183. [PMID: 26735630 DOI: 10.3109/17483107.2015.1111945] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE The concept of a vibrating wristband, to improve dextrous hand function of stroke survivors, was recently proposed with clinical results and is referred to as 'TheraBracelet' in this paper. The purpose of this study was to demonstrate feasibility of a portable, wearable TheraBracelet, and to apply usability evaluation techniques to assess potential demands of TheraBracelet and to identify critical improvement needs of the prototype. METHOD A prototype was developed with a vibrating element housed in an elastic wristband and connected to a wearable electronics box via a cable. Expectation for TheraBracelet and evaluation of the prototype were obtained from 10 chronic stroke survivors using surveys before and after using the prototype and House of Quality analysis. RESULTS The survey for expectation showed stroke survivors' willingness to try out TheraBracelet at a low cost. The survey evaluating the prototype showed that the current prototype was overall satisfactory with a mean rating of 3.7 out of 5. The House of Quality analysis revealed that the priority improvement needs for the prototype are to improve clinical knowledge on long-term effectiveness, reduce cost, ease donning/doffing and waterproof. CONCLUSIONS This study presents a potential for a low-cost wearable hand orthotic likable by stroke survivors. Implications for Rehabilitation Feasibility for a portable wearable wristband-type hand orthotic was demonstrated. The survey showed stroke survivors are willing to try such an orthotic at low cost. The current prototype was rated overall satisfactory by stroke survivors. This study provides a potential for a low-cost wearable hand orthotic likable by stroke survivors.
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Affiliation(s)
- Kishor Lakshminarayanan
- a Department of Industrial and Manufacturing Engineering , University of Wisconsin-Milwaukee , Milwaukee , WI , USA
| | - Fa Wang
- b Department of Biomedical Engineering , University of Wisconsin-Madison , Madison , WI , USA
| | - John G Webster
- b Department of Biomedical Engineering , University of Wisconsin-Madison , Madison , WI , USA
| | - Na Jin Seo
- c Division of Occupational Therapy, Department of Health Professions, Department of Health Sciences and Research , Medical University of South Carolina , Charleston , SC , USA
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Seo NJ, Lakshminarayanan K, Bonilha L, Lauer AW, Schmit BD. Effect of imperceptible vibratory noise applied to wrist skin on fingertip touch evoked potentials - an EEG study. Physiol Rep 2015; 3:3/11/e12624. [PMID: 26603457 PMCID: PMC4673650 DOI: 10.14814/phy2.12624] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 10/15/2015] [Indexed: 11/24/2022] Open
Abstract
Random vibration applied to skin can change the sense of touch. Specifically, low amplitude white-noise vibration can improve fingertip touch perception. In fact, fingertip touch sensation can improve even when imperceptible random vibration is applied to other remote upper extremity areas such as wrist, dorsum of the hand, or forearm. As such, vibration can be used to manipulate sensory feedback and improve dexterity, particularly during neurological rehabilitation. Nonetheless, the neurological bases for remote vibration enhanced sensory feedback are yet poorly understood. This study examined how imperceptible random vibration applied to the wrist changes cortical activity for fingertip sensation. We measured somatosensory evoked potentials to assess peak-to-peak response to light touch of the index fingertip with applied wrist vibration versus without. We observed increased peak-to-peak somatosensory evoked potentials with wrist vibration, especially with increased amplitude of the later component for the somatosensory, motor, and premotor cortex with wrist vibration. These findings corroborate an enhanced cortical-level sensory response motivated by vibration. It is possible that the cortical modulation observed here is the result of the establishment of transient networks for improved perception.
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Affiliation(s)
- Na Jin Seo
- Division of Occupational Therapy, Department of Health Professions, Department of Health Sciences and Research, Medical University of South Carolina, Charleston, South Carolina
| | - Kishor Lakshminarayanan
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - Leonardo Bonilha
- Department of Neurology and Neurosurgery, Medical University of South Carolina, Charleston, South Carolina
| | - Abigail W Lauer
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Brian D Schmit
- Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin
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