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Vibro-tactile stimulation of the neck reduces pain in people with cervical dystonia: a proof-of-concept study

NEUROLOGICAL SCIENCES 2024年第10期45卷 4847-4856页

作者： Xu, Jiapeng Costanzo, Matteo Avanzino, Laura Martino, Davide Salehi, Parisa Standal, Stephanie Manzo, Nicoletta Alizadeh, Parisa Terranova, Sara Bonassi, Gaia Oh, Jinseok Conte, Antonella Konczak, Jurgen Univ Minnesota Sch Kinesiol Human Sensorimotor Control Lab Minneapolis MN USA Ist Super Sanita Dept Neurosci Rome Italy Univ Genoa Dept Expt Med Genoa Italy IRCCS Policlin San Martino Genoa Italy Univ Calgary Dept Clin Neurosci Calgary AB Canada UNIV MINNESOTA DEPT PHYS MED & REHABIL MINNEAPOLIS MN USA IRCCS San Camillo Hosp Venice Italy Univ Genoa Dept Neurosci Genoa Italy Sapienza Univ Rome Dept Human Neurosci Rome Italy IRCCS Neuromed Pozzilli IS Italy Univ Minnesota Ctr Clin Movement Sci Minneapolis MN USA

Background Pain is a common non-motor symptom in patients with cervical dystonia (CD), severely impacting their quality of life. The pathophysiology of CD is incompletely understood but it involves altered processing of proprioceptive and pain *** The purpose of this proof-of-concept study was to determine if vibro-tactile stimulation (VTS)-a non-invasive form of neuromodulation targeting the somatosensory system-can modulate neck pain in people with *** In a multi-center study, 44 CD patients received VTS to sternocleidomastoid and/or trapezius muscles for up to 45 min under 9 different stimulation conditions that either targeted a single or a pair of muscles. The primary outcome measure was a perceived pain score (PPS) rated by participants on a 100-point analogue *** During VTS, 29/44 (66%) of participants experienced a reduction in PPS of at least 10% with 17/44 (39%) reporting a reduction in pain of 50% or higher. After VTS cessation, 57% of participants still reported a 10% or higher reduction in PPS. Effects were significant at the group level and persisted for up to 20 min post-treatment. No distinct optimal stimulation profiles were identified for specific CD phenotypes. Clinical markers of disease severity or duration did not predict the degree of VTS-induced pain *** This proof-of-concept study demonstrates the potential of VTS as a new non-invasive therapeutic option for treating neck pain associated with CD. Further research needs to delineate optimal dosage and long-term effects.

关键词： Focal dystonia human Pain Vibration Somatosensory

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REAL-TIME VOICE ACTIVITY DETECTION USING NECK-MOUNTED ACCELEROMETERS FOR controlLING A WEARABLE VIBRATION DEVICE TO TREAT SPEECH IMPAIRMENT

REAL-TIME VOICE ACTIVITY DETECTION USING NECK-MOUNTED ACCELE...

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Design of Medical Devices Conference (DMD)

作者： Dubey, Saurav Mahnan, Arash Konczak, Jurgen Univ Minnesota Sch Kinesiol Human Sensorimotor Control Lab Minneapolis MN 55455 USA

ISBN: (纸本)9780791883549

Speech analysis using microphones can be problematic for Voice Activity Detection (VAD) in the presence of background noise. This study explored the use of wearable accelerometers instead of microphones. We assessed if accelerometers placed on the neck can be part of a VAD system embedded in a wearable collar-like device that delivers vibro-tactile stimulation (VTS) to the larynx during speech as a therapy for patients with the voice disorder spasmodic dysphonia. Specifically, we aimed to a) find the ideal location for placing accelerometers to the neck, and b) develop a VAD algorithm that detects the onset and offset of speech. Six healthy adult participants (M/F = 3/3, age = 26 (5.1)) vocalized 20 sample sentences with and without VTS at three neck locations: 1) thyroid cartilage, 2) sterno-cleidomastoid, and 3) posterior neck above C7. Based on time-synchronized acceleration and audio signals, VAD algorithm identified the Number of Onsets of Speech and Total Time Voiced. The thyroid cartilage attachment location had over 90% accuracy detecting speech in both measures. The average accuracy of the sternocleidomastoid and C7 locations were below 75% and 15% respectively. VAD accuracy decreased with the presence of VTS trials at all locations. We conclude that accelerometer signals due to tissue motion at thyroid cartilage are most suitable for real-time VAD. These findings support the feasibility of accelerometer-based voice detection for the use in medical devices that target speech and voice disorders.

关键词： Speech vibration voice disorder

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Laryngeal Vibrotactile Stimulation Is Feasible, Acceptable To People With Unexplained Chronic Cough

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LARYNGOSCOPE 2024年第12期134卷 5010-5014页

作者： Misono, Stephanie Shen, Erin Y. Sombrio, Anna G. Lunos, Scott Xu, Jiapeng Hoffmeister, Jesse Stockness, Ali Butcher, Lisa Weinstein, Daniel Gaeckle, Nathaniel T. Gray, Raluca Konczak, Juergen Univ Minnesota Dept OtoHNS 420 Delaware St SEMMC 396 Minneapolis MN 55455 USA Univ Minnesota Med Sch Minneapolis MN 55455 USA Assoc Pediat Program Directors Mclean VA USA Univ Minnesota Clin & Translat Sci Inst Biostat Design & Anal Ctr Minneapolis MN USA Univ Minnesota Sch Kinesiol Human Sensorimotor Control Lab Minneapolis MN USA Univ Minnesota Dept OtoHNS Lions Voice Clin Minneapolis MN USA Univ Minnesota Dept Med Div Pulm Allergy Crit Care & Sleep Minneapolis MN 55455 USA

ObjectivesUnexplained chronic cough (UCC) is common and has significant impacts on quality of life. Ongoing cough can sensitize the larynx, increasing the urge to cough and perpetuating the cycle of chronic cough. Vibrotactile stimulation (VTS) of the larynx is a noninvasive stimulation technique that can modulate laryngeal somatosensory and motor activity. Study objectives were to assess feasibility and acceptability of VTS use by people with UCC. Secondarily, changes in cough-related quality of life measures were *** with UCC recorded cough measures at baseline and after completing 2 weeks of daily VTS. Feasibility and acceptability were assessed through participant-reported device use and structured feedback. Cough-related quality of life measures were the Leicester Cough Questionnaire (LCQ) and the Newcastle Laryngeal Hypersensitivity Questionnaire (NLHQ).ResultsNineteen adults participated, with mean age 67 years and cough duration 130 months. Notably, 93% of planned VTS sessions were logged, 94% of participants found the device comfortable to wear, 89% found it easy to operate and 79% would recommend it to others. Pre-post LCQ change achieved a minimal important difference (MID) (mean 1.3 [SD 2.4, p = 0.015]). NLHQ scores improved, but did not reach an *** VTS use was feasible and acceptable for use by patients with UCC and was associated with a meaningful improvement in cough-related quality of life. Future studies will include VTS dose refinement and the inclusion of a comparison arm to further assess the potential for laryngeal VTS as a novel treatment modality for *** of Evidence4 Laryngoscope, 2024 This study examined the feasibility and acceptability of laryngeal vibrotactile stimulation (VTS) in people with unexplained chronic cough. Laryngeal VTS use was feasible and acceptable and was associated with modest improvements in cough-related scales. Future studies will further examine laryngeal VTS use for chro

关键词： chronic cough quality of life vibrotactile stimulation

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A robot-aided visuomotor wrist training induces motor and proprioceptive learning that transfers to the untrained ipsilateral elbow

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JOURNAL OF NEUROENGINEERING AND REHABILITATION 2023年第1期20卷 1-10页

作者： Zhu, Huiying Wang, Yizhao Elangovan, Naveen Cappello, Leonardo Sandini, Giulio Masia, Lorenzo Konczak, Juergen Univ Minnesota Sch Kinesiol Human Sensorimotor Control Lab 1900 Univ Ave SE Minneapolis MN 55455 USA Tianjin Huanhu Hosp Dept Rehabil Med Tianjin Peoples R China Tianjin Univ Sport Dept Hlth & Exercise Sci Tianjin Peoples R China BioRobot Inst Scuola Super St Anna Pisa Italy Dept Excellence Robot & AI Pisa Italy Ist Italiano Tecnol Dept Robot Brain & Cognit Sci Genoa Italy Heidelberg Univ Inst Tech Informat Heidelberg Germany

BackgroundLearning of a visuomotor task not only leads to changes in motor performance but also improves proprioceptive function of the trained joint/limb system. Such sensorimotor learning may show intra-joint transfer that is observable at a previously untrained degrees of freedom of the trained ***, we examined if and to what extent such learning transfers to neighboring joints of the same limb and whether such transfer is observable in the motor as well as in the proprioceptive domain. Documenting such intra-limb transfer of sensorimotor learning holds promise for the neurorehabilitation of an impaired joint by training the neighboring *** a robotic exoskeleton, 15 healthy young adults (18-35 years) underwent a visuomotor training that required them to make continuous, increasingly precise, small amplitude wrist movements. Wrist and elbow position sense just-noticeable-difference (JND) thresholds and spatial movement accuracy error (MAE) at wrist and elbow in an untrained pointing task were assessed before and immediately after, as well as 24 h after ***, all participants showed evidence of proprioceptive and motor learning in both trained and untrained joints. The mean JND threshold decreased significantly by 30% in trained wrist (M: 1.26 degrees to 0.88 degrees) and by 35% in untrained elbow (M: 1.96 degrees to 1.28 degrees). Second, mean MAE in untrained pointing task reduced by 20% in trained wrist and the untrained elbow. Third, after 24 h the gains in proprioceptive learning persisted at both joints, while transferred motor learning gains had decayed to such extent that they were no longer significant at the group *** findings document that a one-time sensorimotor training induces rapid learning gains in proprioceptive acuity and untrained sensorimotor performance at the practiced joint. Importantly, these gains transfer almost fully to the neighboring, proximal joint/limb system.

关键词： human Learning Motor Proprioception Robotic Rehabilitation Somatosensory

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Assessing and defining explicit processes in visuomotor adaptation

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EXPERIMENTAL BRAIN RESEARCH 2021年第7期239卷 2025-2041页

作者： Heirani Moghaddam, S. Chua, R. Cressman, E. K. Univ Ottawa Sch Human Kinet Sensorimotor Control Lab Fac Hlth Sci Ottawa ON K1N 6N5 Canada Univ British Columbia Canadian Inst Adv Res Vancouver BC V6T 1Z1 Canada

The Process Dissociation Procedure (PDP) and Verbal Report Framework (VRF) reveal that both explicit (conscious) and implicit (unconscious) processes contribute to visuomotor adaptation. We looked to determine whether these two assessment methods establish similar processes underlying visuomotor adaptation by comparing the magnitude of explicit and implicit adaptation over time between the two assessments and to post-experiment assessments of awareness of the visuomotor distortion. Three groups of participants (PDP, VRF, VRF No-Cursor) completed three blocks of reach training in a virtual environment with a cursor rotated 40 degrees clockwise relative to hand motion. Explicit and implicit adaptations were assessed immediately following each block, and again 5 min later. The VRF No-Cursor group completed the same assessment trials as the VRF group, but no visual feedback was presented during explicit and implicit assessment. Finally, participants completed a post-experiment questionnaire and a drawing task to assess their awareness of the visuomotor rotation and changes in reaches at the end of the experiment, respectively. We found that all groups adapted their reaches to the rotation. Averaged across participants, the magnitude and retention of explicit and implicit adaptations were similar between the PDP group and VRF group, with the VRF group demonstrating greater implicit adaptation than the VRF No-Cursor group. Furthermore, the magnitude of explicit adaptation established in the VRF group was not related to participant's post-experiment awareness of the visuomotor distortion nor how they had changed their reaches, as observed in the PDP group and VRF No-Cursor group. Together, these results indicate that, explicit adaptation established via typical VRF methods does not reflect one's awareness of the visuomotor distortion at the end of the experiment, and hence the established processes underlying visuomotor adaptation are dependent on method of assessment (i.e

关键词： Visuomotor adaptation Explicit adaptation Implicit adaptation Process dissociation procedure Verbal report framework

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A SYSTEM FOR THE OBJECTIVE ASSESSMENT OF HAND PROPRIOCEPTIVE FUNCTION IN PEDIATRIC AND ADULT POPULATIONS

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Design of Medical Devices Conference (DMD)

作者： Oh, Jinseok Mahnan, Arash Xu, Jiapeng Holst-Wolf, Jessica Block, Hannah Konczak, Jurgen Univ Minnesota Human Sensorimotor Control Lab Sch Kinesiol Minneapolis MN USA Indiana Univ Sch Publ Hlth Bloomington IN USA

ISBN: (纸本)9780791883549

Proprioceptive signals from mechanoreceptors embedded in ligaments, tendons, and muscles are essential for the control of muscle tone and voluntary movement. Numerous neurological and orthopedic disorders are associated with proprioceptive dysfunction that impairs the control of balance and/or fine motor function. However, obtaining objective measures of proprioceptive function is difficult in most clinical settings, because available assessment methods rely on specialized equipment, expertise, or are too time-consuming. This paper presents a new tablet-based system that objectively measures finger position sense by implementing a psychophysical threshold search method. We here provide initial data that demonstrate the ease-of-use and efficacy of the system.

关键词： Acuity Finger position sense Proprioception Perception

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Ankle proprioception and the relationship to rigidity in Parkinson's disease

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CLINICAL NEUROPHYSIOLOGY 2025年 175卷 2110740-2110740页

作者： Sertic, Jacquelyn V. L. Kang, Jason MacKinnon, Colum D. Konczak, Jurgen Univ Minnesota Dept Family Med & Community Hlth Brains Mot Lab Minneapolis MN 55455 USA Univ Minnesota Ctr Clin Movement Sci Minneapolis MN 55455 USA Univ Minnesota Ctr Appl Translat Sensory Sci Minneapolis MN 55455 USA Univ Minnesota Sch Kinesiol Human Sensorimotor Control Lab Minneapolis MN USA Univ Minnesota Dept Neurol Movement Disorders Lab Minneapolis MN USA Univ Minnesota Inst Translat Neurosci Minneapolis MN 55414 USA

Objective: Proprioceptive mechanoreceptor afferents form the basis for the perception of body position and muscle tone regulation. Parkinson's disease (PD) is associated with proprioceptive dysfunction. This study aimed to characterize the extent of ankle position sense dysfunction in PD and its relationship with abnormal muscle tone. Methods: Sixteen people with PD and 16 controls participated. Using a 2-forced-choice psychophysical paradigm, a participant's ankle was passively rotated to two positions-a reference of 15(degrees) plantarflexion and a smaller amplitude comparison position. Subsequently, the user verbally indicated which position was perceived as more plantarflexed. From the stimulus-response data a just-noticeable-difference (JND) threshold and uncertainty area (UA) were derived as measures of ankle position sense acuity. Muscle rigidity was assessed using the MDS-UPDRS III scale. Results: Both median JND threshold and UA were significantly elevated in the group with PD compared to controls (p < 0.05). JND threshold correlated positively with lower extremity rigidity (p = 0.047). Conclusion: PD can lead to reduced ankle position sense acuity. Lower proprioceptive acuity tended to be associated with higher rigidity, suggesting that PD broadly alters proprioceptive signal processing affecting both perception and regulation of muscle tone. Significance: Impairments in proprioceptive processing contribute to both proprioceptive dysfunction and rigidity in PD.

关键词： Position sense Psychophysics Muscle Perception Somatosensory human

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Investigation of the effect of virtual reality on postural stability in healthy adults

Investigation of the effect of virtual reality on postural s...

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27th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Oh, Jinseok Curry, Christopher Mahnan, Arash Univ Minnesota Sch Kinesiol Human Sensorimotor Control Lab Minneapolis MN 55455 USA Univ Minnesota Sch Kinesiol Affordance Percept Act Lab Minneapolis MN 55455 USA

ISBN: (纸本)9781728165325

Previous research has shown that individuals behave differently in certain virtual reality tasks. The effect of VR on human posture and stability is an important factor that can influence the future applications of VR devices. This current study seeks to investigate how a person's postural stability differs between VR and normal environment while attempting to replicate the influence of target distance on sway. Ten healthy subjects were tested in both environments with targets varying in distance. The results found a significant difference in postural stability for normal anatomical stance tasks between VR and normal environments.

关键词： Virtual Reality Postural Stability Center of Pressure (CoP)

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Effects of a robot-aided somatosensory training on proprioception and motor function in stroke survivors

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JOURNAL OF NEUROENGINEERING AND REHABILITATION 2021年第1期18卷 1-11页

作者： Yeh, I-Ling Holst-Wolf, Jessica Elangovan, Naveen Cuppone, Anna Vera Lakshminarayan, Kamakshi Capello, Leonardo Masia, Lorenzo Konczak, Juergen Singapore Inst Technol Hlth & Social Sci Cluster Singapore Singapore Univ Minnesota Sch Kinesiol Human Sensorimotor Control Lab Minneapolis MN USA Ist Italiano Tecnol Dept Robot Brain & Cognit Sci Genoa Italy Univ Minnesota Dept Neurol Minneapolis MN 55455 USA Univ Minnesota Sch Publ Hlth Minneapolis MN USA Scuola Super StAnna BioRobot Inst Pisa Italy Scuola Super StAnna Dept Excellence Robot & AI Pisa Italy Heidelberg Univ Inst Tech Informat Heidelberg Germany

Background: Proprioceptive deficits after stroke are associated with poor upper limb function, slower motor recovery, and decreased self-care ability. Improving proprioception should enhance motor control in stroke survivors, but current evidence is inconclusive. Thus, this study examined whether a robot-aided somatosensory-based training requiring increasingly accurate active wrist movements improves proprioceptive acuity as well as motor performance in chronic stroke. Methods: Twelve adults with chronic stroke completed a 2-day training (age range: 42-74 years;median time-after-stroke: 12 months;median Fugl-Meyer UE: 65). Retention was assessed at Day 5. Grasping the handle of a wrist-robotic exoskeleton, participants trained to roll a virtual ball to a target through continuous wrist adduction/abduction movements. During training vision was occluded, but participants received real-time, vibro-tactile feedback on their forearm about ball position and speed. Primary outcome was the just-noticeable-difference (JND) wrist position sense threshold as a measure of proprioceptive acuity. Secondary outcomes were spatial error in an untrained wrist tracing task and somatosensory-evoked potentials (SEP) as a neural correlate of proprioceptive function. Ten neurologically-intact adults were recruited to serve as non-stroke controls for matched age, gender and hand dominance (age range: 44 to 79 years;6 women, 4 men). Results: Participants significantly reduced JND thresholds at posttest and retention (Stroke group: pretest: mean: 1.77 degrees [SD: 0.54 degrees] to posttest mean: 1.38 degrees [0.34 degrees];control group: 1.50 degrees [0.46 degrees] to posttest mean: 1.45 degrees [SD: 0.54 degrees];F[2,37] = 4.54, p = 0.017, eta(2)(p) = 0.20) in both groups. A higher pretest JND threshold was associated with a higher threshold reduction at posttest and retention (r = -0.86, -0.90, p <= 0.001) among the stroke participants. Error in the untrained tracing task was reduced by 2

关键词： human Somatosensation Upper limb Rehabilitation Cerebrovascular disease/stroke

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Investigation of the effect of virtual reality on postural stability in healthy adults

Investigation of the effect of virtual reality on postural s...

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Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW), IEEE Conference on

作者： Jinseok Oh Christopher Curry Arash Mahnan Human Sensorimotor Control Lab School of Kinesiology University of Minnesota Affordance Perception-Action Lab School of Kinesiology University of Minnesota

ISBN: (数字)9781728165325

ISBN: (纸本)9781728165332

Previous research has shown that individuals behave differently in certain virtual reality tasks. The effect of VR on human posture and stability is an important factor that can influence the future applications of VR devices. This current study seeks to investigate how a person’s postural stability differs between VR and normal environment while attempting to replicate the influence of target distance on sway. Ten healthy subjects were tested in both environments with targets varying in distance. The results found a significant difference in postural stability for normal anatomical stance tasks between VR and normal environments.

关键词： Task analysis Stability criteria Virtual reality human computer interaction human factors

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