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Gori M, Crepaldi M, Orciari L, Campus C, Merello A, Dellepiane D, Parmiggiani A. RoMAT: Robot for Multisensory Analysis and Testing of visual-tactile perceptual functions. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2021; 2021:4781-4786. [PMID: 34892280 DOI: 10.1109/embc46164.2021.9630479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The present work aims to introduce a novel robotic platform suitable for investigating perception in multi-sensory motion tasks for individuals with and without sensory and motor disabilities. The system, called RoMAT, allows the study of how multisensory signals are integrated, taking into account the speed and direction of the stimuli. It is a robotic platform composed of a visual and tactile wheel mounted on two routable plates to be moved under the finger and the visual observation of the participants. We validated the system by implementing a rotation discrimination task considering two different sensory modalities: vision, touch and multisensory visual-tactile integration. Four healthy subjects were asked to report the length of motion rotation after perceiving a moving stimulus generated by the visual, tactile, or both stimuli. Results suggest that multisensory precision improves when multiple sensory stimulations are presented. The new system can therefore provide fundamental inputs in determining the perceptual principles of motion processing. Therefore, this device can be a potential system to design screening and rehabilitation protocols based on neuroscientific findings to be used in individuals with visual and motor impairments.Clinical relevance- This research presents a novel robotic motion simulator to deliver combined or independent stimulation of the visual and tactile sensory signals.
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Lima KCA, Santos GOC, Donato SSV, Borges L, Hatanaka E, de Freitas PB. Grip and load force control and coordination in individuals with diabetes in different manipulation tasks. Hum Mov Sci 2021; 77:102793. [PMID: 33845277 DOI: 10.1016/j.humov.2021.102793] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 01/25/2021] [Accepted: 04/01/2021] [Indexed: 10/21/2022]
Abstract
The study aimed to investigate the control and coordination of grip force (normal component) and load force (tangential component) in three different manipulation tasks in individuals with diabetes with and with no diagnosis of diabetic peripheral neuropathy (DPN) and healthy controls. Twenty-four individuals with type 2 diabetes mellitus, 12 with no (nDPN) and 12 with DPN (wDPN), and 12 healthy controls performed three manipulation tasks (static holding, lifting and holding, and oscillation) with the dominant hand, using an instrumented handle. Relative safety margin (% of GF exerted above the minimum GF needed to hold the object) was measured in all tasks. Individuals with diabetes from the nDPN and wDPN groups set lower relative safety margin than controls only in the static holding task. No other group effect was revealed, except a lower coefficient of friction between skin and object surface in individuals with DPN. The coordination between grip and load force and grip force control was not affected by the diabetes during dynamic manipulation tasks (lifting and holding and oscillation). However, when individuals with diabetes without and with DPN performed a manipulation task in which the inflow of cutaneous information was small and stable (static holding), grip force control was affected by the disease. This finding indicates that individuals with type 2 diabetes mellitus not diagnosed with DPN, already show mild impairments in the nervous system that could affect grip force control and that could be one of the first signs of neuropathy caused by the diabetes.
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Affiliation(s)
- Kauê C A Lima
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil
| | - Gabriela O C Santos
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil
| | - Stephanie S V Donato
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil
| | - Leandro Borges
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil
| | - Elaine Hatanaka
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil
| | - Paulo B de Freitas
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil.
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Swanepoel I, van Staden W, Fletcher L. Psychological Resilience and Vulnerability as Mediators Between Adverse Life Events and Fatigue, Motor Dysfunction, and Paresthesia in Multiple Sclerosis. Psychosom Med 2021; 82:138-146. [PMID: 31860531 DOI: 10.1097/psy.0000000000000770] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Adverse life events have been associated with exacerbating multiple sclerosis (MS) symptoms, but results have been variable, raising the question on the role of other psychological factors. This study examined the role of psychological resilience and vulnerability as mediators between adverse life events on MS symptoms. METHODS Participants with MS (N = 1239) were aged 18 to 81 years (mean [SD] = 45.6 [10.4] years), and 84.5% were female. MS symptoms were measured by the modified Fatigue Severity Scale, modified Fatigue Assessment Scale, Motor Dysfunction Assessment Scale, Paraesthesiae Spell Duration Scale, and the Paraesthesiae Cumulative Duration Scale. Psychological measures included the Connor-Davidson Resilience Scale, Resilience Scale for Adults, Psychological Vulnerability Scale, the vulnerability section of the Defence Style Questionnaire, and the Adverse Life Events Assessment Scale. Regression analyses and structural equation modeling were performed. RESULTS Adverse life events during the preceding 60 days were associated with fatigue, motor dysfunction, and paresthesia, but with small effect sizes (β from 0.07 to 0.15; p ≤ .014). A structural equation model by which resilience mediated less and vulnerability more MS symptoms after adverse life events during the preceding 60 days showed a statistically significant fit with the data of a moderate to good degree (p < .001; goodness-of-fit statistic = 0.725; root mean square error of approximation = 0.047). Vulnerability played a markedly larger role than did resilience. CONCLUSION The results suggest that psychological resilience and vulnerability play mediating roles in the relation between adverse life events and MS symptoms, but other psychological factors also need to be investigated.
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Affiliation(s)
- Isabelle Swanepoel
- From the Department of Psychiatry (Swanepoel), Centre for Ethics and Philosophy of Health Sciences (van Staden), and Department of Statistics (Fletcher), University of Pretoria, Pretoria, South Africa
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Ayache SS, Riachi N, Ahdab R, Chalah MA. Effects of Transcranial Direct Current Stimulation on Hand Dexterity in Multiple Sclerosis: A Design for a Randomized Controlled Trial. Brain Sci 2020; 10:E185. [PMID: 32210025 PMCID: PMC7139332 DOI: 10.3390/brainsci10030185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/20/2020] [Accepted: 03/22/2020] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Cerebellar and motor tracts are frequently impaired in multiple sclerosis (MS). Altered hand dexterity constitutes a challenge in clinical practice, since medical treatment shows very limited benefits in this domain. Cerebellar control is made via several cerebellocortical pathways, of which the most studied one links the cerebellum to the contralateral motor cortex via the contralateral ventro-intermediate nucleus of the thalamus influencing the corticospinal outputs. Modulating the activity of the cerebellum or of the motor cortex could be of help. METHOD The main interest here is to evaluate the efficacy of transcranial direct current stimulation (tDCS), a noninvasive brain stimulation technique, in treating altered dexterity in MS. Forty-eight patients will be recruited in a randomized, double-blind, sham-controlled, and crossover study. They will randomly undergo one of the three interventions: anodal tDCS over the primary motor area, cathodal tDCS over the cerebellum, or sham. Each block consists of five consecutive daily sessions with direct current (2 mA), lasting 20 min each. The primary outcome will be the improvement in manual dexterity according to the change in the time required to complete the nine-hole pegboard task. Secondary outcomes will include fatigue, pain, spasticity, and mood. Patients' safety and satisfaction will be rated. DISCUSSION Due to its cost-effective, safe, and easy-to-use profile, motor or cerebellar tDCS may constitute a potential tool that might improve dexterity in MS patients and therefore ameliorate their quality of life.
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Affiliation(s)
- Samar S. Ayache
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil, 94010 Créteil, France ; (S.S.A.); (M.A.C.)
- Service de Physiologie – Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique–Hôpitaux de Paris, 94010 Créteil, France
| | - Naji Riachi
- Neurology Division, Lebanese American University Medical Center Rizk Hospital, Beirut 113288, Lebanon;
- Gilbert and Rose Mary Chagoury School of Medicine School of Medicine, Lebanese American University, Byblos 4504, Lebanon
| | - Rechdi Ahdab
- Neurology Division, Lebanese American University Medical Center Rizk Hospital, Beirut 113288, Lebanon;
- Gilbert and Rose Mary Chagoury School of Medicine School of Medicine, Lebanese American University, Byblos 4504, Lebanon
| | - Moussa A. Chalah
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil, 94010 Créteil, France ; (S.S.A.); (M.A.C.)
- Service de Physiologie – Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique–Hôpitaux de Paris, 94010 Créteil, France
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Application of Quantitative Motor Assessments in Friedreich Ataxia and Evaluation of Their Relation to Clinical Measures. THE CEREBELLUM 2019; 18:896-909. [DOI: 10.1007/s12311-019-01073-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Cunha BP, Freitas SMSF, Gomes GFO, de Freitas PB. Hand Grip and Load Force Coordination of the Ipsilesional Hand of Chronic Stroke Individuals. J Mot Behav 2019; 51:610-621. [PMID: 30600789 DOI: 10.1080/00222895.2018.1547892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Object manipulation depends on a refined control of grip force (GF) and load force (LF). After a brain injury, the GF control is altered in the paretic hand but what happens with the non-paretic hand is still unclear. In this study, we compared the GF control and GF-LF coordination of the non-paretic hand of 10 stroke individuals who suffered right brain damage (RBD) and 10 who suffered left brain damage (LBD), with 20 healthy individuals during lifting and oscillation task, using an instrumented object. GF was recorded with a force transducer, and LF was estimated from the object weight and acceleration. Overall, the ipsilesional hand of stroke individuals, independent of the lesion side, presented similar GF control and GF-LF coordination. However, LBD individuals took longer to start lifting the object, which may be due to the need of more time to obtain somatosensory information from the contact with the object. The findings indicate that stroke individuals preserve their ability to control and coordinate GF and LF when using their ipsilesional hand for object manipulation and the left hemisphere may play an essential role in the processing of somatosensory information needed for the GF control.
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Affiliation(s)
- Bianca P Cunha
- Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University , São Paulo , SP , Brazil
| | - Sandra M S F Freitas
- Masters and Doctoral Programs in Physical Therapy, São Paulo City University , São Paulo , SP , Brazil .,Department of Neurology, Milton S. Hershey Medical Center, The Pennsylvania State University , Hershey , PA , USA .,Department of Kinesiology, The Pennsylvania State University , University Park , PA , USA
| | - Georgia F O Gomes
- Masters and Doctoral Programs in Physical Therapy, São Paulo City University , São Paulo , SP , Brazil
| | - Paulo B de Freitas
- Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University , São Paulo , SP , Brazil .,Department of Neurology, Milton S. Hershey Medical Center, The Pennsylvania State University , Hershey , PA , USA .,Department of Kinesiology, The Pennsylvania State University , University Park , PA , USA
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The kinematics of handwriting movements as expression of cognitive and sensorimotor impairments in people with multiple sclerosis. Sci Rep 2017; 7:17730. [PMID: 29255220 PMCID: PMC5735165 DOI: 10.1038/s41598-017-18066-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 12/02/2017] [Indexed: 11/23/2022] Open
Abstract
Handwriting is an important activity of daily living, which requires sensorimotor and cognitive skills that could deteriorate in presence of neurological diseases. Handwriting impairments are common in people with multiple sclerosis (PwMS). Aims of the present study were to characterize handwriting movement features of PwMS in comparison with those of healthy adults, and to evaluate the relationship between kinematic parameters of handwriting movements and the results of the assessment of cognitive and motor domains. A new handwriting evaluation methodology was applied to quantify handwriting features of 19 PwMS and 22 age-matched healthy controls who were required to write a sentence on a digitizing tablet. Kinematic parameters of the sentence and of the strokes were used to evaluate handwriting performance. PwMS showed an altered handwriting kinematics with respect to healthy controls: higher movement duration, fragmented velocity profile and higher jerk. Furthermore, motor abilities and cognitive status of PwMS were related to handwriting parameters in accordance with the evidence that MS is a multifactorial disease affecting different domains. These results suggested that the proposed methodology might be a valuable tool to quantitatively assess handwriting impairments and the efficacy of handwriting treatments in PwMS.
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Lima KCDA, Borges LDS, Hatanaka E, Rolim LC, de Freitas PB. Grip force control and hand dexterity are impaired in individuals with diabetic peripheral neuropathy. Neurosci Lett 2017; 659:54-59. [PMID: 28867590 DOI: 10.1016/j.neulet.2017.08.071] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 08/24/2017] [Accepted: 08/24/2017] [Indexed: 11/19/2022]
Abstract
Diabetic peripheral neuropathy (DPN) affects the sensory function of the hands and, consequently, may negatively impact hand dexterity, maximum grip strength (GSMax), and hand grip force (GF) control during object manipulation. The aims of this study were to examine and compare the GF control during a simple holding task as well as GSMax and hand dexterity of individuals with DPN and healthy controls. Ten type 2 diabetic individuals diagnosed with DPN and ten age- and gender-matched healthy controls performed two traditional timed hand dexterity tests (i.e., nine-hole peg test and Jebsen-Taylor hand function test), a GSMax test, and a GF control test (i.e., hold a instrumented handle). The results indicated that individuals with DPN and controls produced similar GSMax. However, individuals with DPN took longer to perform the hand dexterity tests and set lower safety margin (exerted lower GF) than controls when holding the handle. The findings showed that mild to moderate DPN did not significantly affect maximum hand force generation, but does impair hand dexterity and hand GF control, which could impair the performance of daily living manipulation tasks and put them in risk of easily dropping handheld objects.
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Affiliation(s)
- Kauê Carvalho de Almeida Lima
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil
| | - Leandro da Silva Borges
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil
| | - Elaine Hatanaka
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil
| | - Luiz Clemente Rolim
- Endocrinology Division, Diabetes Center of Universidade Federal de São Paulo (UNIFESP), Escola Paulista de Medicina, São Paulo, Brazil
| | - Paulo Barbosa de Freitas
- Institute of Physical Activity and Sports Sciences and Interdisciplinary Graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo, Brazil.
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Predictive and Reactive Grip Force Responses to Rapid Load Increases in People With Multiple Sclerosis. Arch Phys Med Rehabil 2017; 98:525-533. [DOI: 10.1016/j.apmr.2016.08.465] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 08/02/2016] [Indexed: 11/20/2022]
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Haberland K, Uygur M. Simultaneous assessment of hand function and neuromuscular quickness through a static object manipulation task in healthy adults. Exp Brain Res 2016; 235:321-329. [PMID: 27717994 DOI: 10.1007/s00221-016-4797-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 10/03/2016] [Indexed: 01/04/2023]
Abstract
Both hand function [as seen through the coordination between grip force (GF) and load force (LF)] and the ability to produce a submaximal force quickly (i.e., neuromuscular quickness) are two important qualities of motor function that could be seriously affected by the presence of neurological diseases. Therefore, their quantitative assessment is very important in clinical settings. Within this study, we aimed to develop, standardize, and measure the within-session reliability of a clinically meaningful test that assesses both hand function and neuromuscular quickness simultaneously. Thirteen healthy young adults produced around 90 rapid isometric LF pulses to varying submaximal magnitudes by either pulling down or pulling up on an externally fixed GF- and LF-measuring device. Results revealed high indices of force coordination (i.e., GF scaling as assessed by GF/LF and GF coupling as assessed by maximum cross-correlation between GF and LF) in both force directions, while GF coupling was higher in downward than in upward direction (p < 0.001). Regarding the indices of neuromuscular quickness (i.e., the regression parameters obtained from the relationship between peak force and it's rate of development and half-relaxation time), results, in general, revealed a higher slope (named as rate of force development scaling factor; p < 0.01), similar R 2 (p > 0.05), and shorter half-relaxation time (p < 0.05) for LF than for GF. Furthermore, all of the selected variables showed moderate to excellent within-session reliability with only 45 pulses. Findings suggest that brief force production tasks should be further evaluated as clinical tests of hand function and neuromuscular quickness in various populations.
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Affiliation(s)
- Karen Haberland
- Department of Mechanical Engineering, Rowan University, Glassboro, NJ, USA
| | - Mehmet Uygur
- Department of Health and Exercise Science, Rowan University, 201 Mullica Hill Road, Glassboro, NJ, 08028, USA.
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Reschechtko S, Zatsiorsky VM, Latash ML. The synergic control of multi-finger force production: stability of explicit and implicit task components. Exp Brain Res 2016; 235:1-14. [PMID: 27601252 DOI: 10.1007/s00221-016-4768-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 08/29/2016] [Indexed: 01/01/2023]
Abstract
Manipulating objects with the hands requires the accurate production of resultant forces including shear forces; effective control of these shear forces also requires the production of internal forces normal to the surface of the object(s) being manipulated. In the present study, we investigated multi-finger synergies stabilizing shear and normal components of force, as well as drifts in both components of force, during isometric pressing tasks requiring a specific magnitude of shear force production. We hypothesized that shear and normal forces would evolve similarly in time and also show similar stability properties as assessed by the decomposition of inter-trial variance within the uncontrolled manifold hypothesis. Healthy subjects were required to accurately produce total shear and total normal forces with four fingers of the hand during a steady-state force task (with and without visual feedback) and a self-paced force pulse task. The two force components showed similar time profiles during both shear force pulse production and unintentional drift induced by turning the visual feedback off. Only the explicitly instructed components of force, however, were stabilized with multi-finger synergies. No force-stabilizing synergies and no anticipatory synergy adjustments were seen for the normal force in shear force production trials. These unexpected qualitative differences in the control of the two force components-which are produced by some of the same muscles and show high degree of temporal coupling-are interpreted within the theory of control with referent coordinates for salient variables. These observations suggest the existence of two classes of neural variables: one that translates into shifts of referent coordinates and defines changes in magnitude of salient variables, and the other controlling gains in back-coupling loops that define stability of the salient variables. Only the former are shared between the explicit and implicit task components.
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Affiliation(s)
- Sasha Reschechtko
- Department of Kinesiology, Rec.Hall-267, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Vladimir M Zatsiorsky
- Department of Kinesiology, Rec.Hall-267, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Mark L Latash
- Department of Kinesiology, Rec.Hall-267, The Pennsylvania State University, University Park, PA, 16802, USA.
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Jo HJ, Mattos D, Lucassen EB, Huang X, Latash ML. Changes in Multidigit Synergies and Their Feed-Forward Adjustments in Multiple Sclerosis. J Mot Behav 2016; 49:218-228. [PMID: 27715488 DOI: 10.1080/00222895.2016.1169986] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The authors explored the changes in multidigit synergies in patients with multiple sclerosis (MS) within the framework of the uncontrolled manifold hypothesis. The specific hypotheses were that both synergy indices and anticipatory synergy adjustments prior to the initiation of a self-paced quick action would be diminished in the patients compared to age-matched controls. The MS patients and age-matched controls (n = 13 in both groups) performed one-finger and multifinger force production tasks involving both accurate steady-state force production and quick force pulses. The patients showed significantly lower maximal finger forces and a tendency toward slower force pulses. Enslaving was increased in MS, but only in the lateral fingers (index and little). Indices of multifinger synergies during steady-state force production were lower in MS, mainly due to the lower amount of intertrial variance that did not affect total force. Anticipatory synergy adjustments were significantly delayed in MS. The results show that MS leads to significant changes in multidigit synergies and feed-forward adjustments of the synergies prior to a quick action. The authors discuss possible contributions of subcortical structures to the impaired synergic control.
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Affiliation(s)
- Hang Jin Jo
- a Department of Kinesiology , The Pennsylvania State University, University Park
| | - Daniela Mattos
- a Department of Kinesiology , The Pennsylvania State University, University Park
| | - Elisabeth B Lucassen
- b Department of Neurology , Pennsylvania State University-Milton S. Hershey Medical Center , Hershey
| | - Xuemei Huang
- b Department of Neurology , Pennsylvania State University-Milton S. Hershey Medical Center , Hershey.,c Department of Pharmacology , Pennsylvania State University-Milton S. Hershey Medical Center , Hershey.,d Department of Radiology , Pennsylvania State University-Milton S. Hershey Medical Center , Hershey.,e Department of Neurosurgery , Pennsylvania State University-Milton S. Hershey Medical Center , Hershey
| | - Mark L Latash
- a Department of Kinesiology , The Pennsylvania State University, University Park
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Kraft GH, Amtmann D, Bennett SE, Finlayson M, Sutliff MH, Tullman M, Sidovar M, Rabinowicz AL. Assessment of Upper Extremity Function in Multiple Sclerosis: Review and Opinion. Postgrad Med 2015; 126:102-8. [DOI: 10.3810/pgm.2014.09.2803] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Impaired Object Handling during Bimanual Task Performance in Multiple Sclerosis. Mult Scler Int 2014; 2014:450420. [PMID: 25170424 PMCID: PMC4142153 DOI: 10.1155/2014/450420] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 06/12/2014] [Accepted: 06/14/2014] [Indexed: 12/04/2022] Open
Abstract
We investigated the kinetic features of manual dexterity and fine motor control during a task that resembles an activity of daily living in 30 persons with relapsing-remitting multiple sclerosis (PwMS). Specifically, a novel two-transducer system was used to measure time and grip-load forces during a bimanual task that is similar to opening and closing a jar. We hypothesized that PwMS would have increased grip force production, deteriorations in kinetic timing, and preserved grip-load coupling indices compared to healthy controls (i.e., young and older adults). Increased grip force production and deterioration in timing indices were confirmed in PwMS. Abnormal grip-load coupling was exhibited by PwMS, in contrast to healthy participants. The correlation between task time and self-reported disability scores suggests that objective measurement of impaired upper-extremity movements relates to perception of overall function.
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de Freitas P, Lima K. Grip force control during simple manipulation tasks in non-neuropathic diabetic individuals. Clin Neurophysiol 2013; 124:1904-10. [DOI: 10.1016/j.clinph.2013.04.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 02/21/2013] [Accepted: 04/03/2013] [Indexed: 11/16/2022]
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Poole JL, Nakamoto T, McNulty T, Montoya JR, Weill D, Dieruf K, Skipper B. Dexterity, visual perception, and activities of daily living in persons with multiple sclerosis. Occup Ther Health Care 2013; 24:159-70. [PMID: 23898901 DOI: 10.3109/07380571003681202] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACT The purposes of this study were to compare dexterity, visual perception, and abilities to carry out activities of daily living (ADL) in persons with different multiple sclerosis (MS) subtypes and to determine what relationships exist between the three variables. Fifty-six persons with MS were administered tests of dexterity, visual perception, and ADL ability. Demographic variables and scores on Kurtzke's Expanded Disability Status Scale were also collected. Scores from the chronic-progressive group were significantly higher than those of the benign and progressive-relapsing groups for the Nine-Hole Peg Test-Left Hand, Grooved Peg Test, and Functional Status Index (except Functional Status Index-Pain). There were no differences between the MS groups for any demographic variables except on the Expanded Disability Status Scale. Visual perception did not correlate with dexterity or ADL ability, and only dexterity scores for the left hand correlated with ADL ability. Persons with the severer subtype of MS were significantly impaired compared with the least severe group for dexterity and ADL ability. Decreased dexterity was associated with needing more assistance and having more perceived difficulty with ADL.
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Affiliation(s)
- Janet L Poole
- Janet L. Poole is a professor in the Occupational Therapy Graduate Program at the University of New Mexico, Albuquerque, New Mexico
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Pedão ST, Barela JA, Lima KCDA, de Freitas PB. Grip and load force coordination in cyclical isometric manipulation task is not affected by the feedback type. J Neuroeng Rehabil 2013; 10:34. [PMID: 23557240 PMCID: PMC3635925 DOI: 10.1186/1743-0003-10-34] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 03/26/2013] [Indexed: 01/21/2023] Open
Abstract
Background The relationship between normal and tangential force components (grip force – GF and load force – LF, respectively) acting on the digits-object interface during object manipulation reveals neural mechanisms involved in movement control. Here, we examined whether the feedback type provided to the participants during exertion of LF would influence GF-LF coordination and task performance. Methods Sixteen young (24.7 ±3.8 years-old) volunteers isometrically exerted continuously sinusoidal FZ (vertical component of LF) by pulling a fixed instrumented handle up and relaxing under two feedback conditions: targeting and tracking. In targeting condition, FZ exertion range was determined by horizontal lines representing the upper (10 N) and lower (1 N) targets, with frequency (0.77 or 1.53 Hz) dictated by a metronome. In tracking condition, a sinusoidal template set at similar frequencies and range was presented and should be superposed by the participants’ exerted FZ. Task performance was assessed by absolute errors at peaks (AEPeak) and valleys (AEValley) and GF-LF coordination by GF-LF ratios, maximum cross-correlation coefficients (rmax), and time lags. Results The results revealed no effect of feedback and no feedback by frequency interaction on any variable. AEPeak and GF-LF ratio were higher and rmax lower at 1.53 Hz than at 0.77 Hz. Conclusion These findings indicate that the type of feedback does not influence task performance and GF-LF coordination. Therefore, we recommend the use of tracking tasks when assessing GF-LF coordination during isometric LF exertion in externally fixed instrumented handles because they are easier to understand and provide additional indices (e.g., RMSE) of voluntary force control.
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Affiliation(s)
- Sabrina Tiago Pedão
- Institute of Physical Activity and Sport Sciences and Graduate Program in Human Movement Sciences, Cruzeiro do Sul University, Rua Galvão Bueno 868, 13° andar, Bloco B, São Paulo 01506-000, SP, Brazil
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Uygur M, Jin X, Knezevic O, Jaric S. Two-dimensional static manipulation tasks: does force coordination depend on change of the tangential force direction? Exp Brain Res 2012; 222:365-75. [PMID: 22923208 DOI: 10.1007/s00221-012-3221-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 08/06/2012] [Indexed: 10/28/2022]
Abstract
Coordination of the grip force (GF) with a tangential force (TF, often referred to as load force) exerted along a certain line in space (i.e., one-dimensional tasks) during object manipulation has proved both to be high and based on feed-forward neural control mechanisms. However, GF-TF coordination deteriorates when the TF of one-dimensional task consecutively switches its direction (bidirectional task). In the present study, we aimed to explore GF-TF coordination in the generally neglected multi-dimensional manipulations. We hypothesized that the coordination would depend on the number of unidirectional and bidirectional orthogonal components of a two-dimensional TF exertion. Fourteen subjects traced various circular TF patterns and their orthogonal diameters shown on a computer screen by exerting a static TF. As expected, the unidirectional tasks revealed higher GF-TF coordination than the bidirectional ones (e.g., higher GF-TF correlations and GF gains, and lower GF/TF ratio). Regarding the circular tasks, most of the data were in line with the hypothesis revealing higher coordination associated with higher number of unidirectional components. Of particular importance could be that the circular tasks also revealed prominent time lags of GF with respect to TF, suggesting involvement of feedback mechanisms. We conclude that the force coordination in bidirectional static manipulations could be affected by changes in TF direction along either of its orthogonal components. The time lags observed from the circular tasks could be a consequence of the activity of sensory afferents, rather than of the visual feedback provided or the task complexity.
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Affiliation(s)
- Mehmet Uygur
- Biomechanics and Movement Science Graduate Program, University of Delaware, Newark, DE, USA
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Grasping multiple sclerosis: do quantitative motor assessments provide a link between structure and function? J Neurol 2012; 260:407-14. [PMID: 22872165 PMCID: PMC3566382 DOI: 10.1007/s00415-012-6639-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 07/23/2012] [Accepted: 07/24/2012] [Indexed: 11/13/2022]
Abstract
Motor disability in MS is commonly assessed by the Expanded Disability Status Scale (EDSS). Categorical rating scales are limited by subjective error and inter-rater variability. Therefore, objective and quantitative measures of motor disability may be useful to supplement the EDSS in the setting of clinical trials. It was previously shown that grip-force-variability (GFV) is increased in MS. We hypothesized that GFV may be an objective measure of motor disability in MS. To investigate whether the increase in GFV in MS is correlated to the clinical disability as assessed by the EDSS and to microstructural changes in the brain as assessed by diffusion tensor imaging, GFV was recorded in a grasping and lifting task in 27 MS patients and 23 controls using a grip-device equipped with a force transducer. The EDSS was assessed by neurologists experienced in MS. Patients underwent diffusion tensor imaging at 3T to assess the fractional anisotropy (FA) of the cerebral white matter as a measure of microstructural brain integrity. GFV was increased in MS and correlated to changes in the FA of white matter in the vicinity of the somatosensory and visual cortex. GFV also correlated with the EDSS. GFV may be a useful objective measure of motor dysfunction in MS linked to disability and structural changes in the brain. Our data suggests that GFV should be further explored as an objective measure of motor dysfunction in MS. It could supplement the EDSS, e.g., in proof of concept studies.
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The effects of instruction and hand dominance on grip-to-load force coordination in manipulation tasks. Neurosci Lett 2011; 504:330-5. [DOI: 10.1016/j.neulet.2011.09.059] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 09/08/2011] [Accepted: 09/22/2011] [Indexed: 11/22/2022]
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Mackenzie SJ, Getchell N, Modlesky CM, Miller F, Jaric S. Using Grasping Tasks to Evaluate Hand Force Coordination in Children With Hemiplegic Cerebral Palsy. Arch Phys Med Rehabil 2009; 90:1439-42. [DOI: 10.1016/j.apmr.2009.02.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2008] [Revised: 02/16/2009] [Accepted: 02/17/2009] [Indexed: 11/24/2022]
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Iyengar V, Santos MJ, Ko M, Aruin AS. Grip Force Control in Individuals With Multiple Sclerosis. Neurorehabil Neural Repair 2009; 23:855-61. [DOI: 10.1177/1545968309338194] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Background. Appropriate regulation of grip force is essential in performance of various activities of daily living such as drinking, eating, buttoning a shirt, and so on. The extent to which individuals with multiple sclerosis (MS) are able to regulate grip forces while performing elements of the activities of daily living is largely unknown. Objective. To investigate how individuals with MS control grip force during performance of functional tasks. Methods. This study evaluated the grip force control in selected individuals with MS (n = 9) and healthy control subjects (n = 9) while they performed the task of lifting and placing an instrumented object on a shelf and the task of lifting the object and bringing it close to the mouth to mimic drinking. The grip forces, object acceleration, force ratio, and time lag were recorded and analyzed. Results. The individuals with MS used significantly larger peak grip force and force ratio than control subjects while performing both tasks and for both hands. In addition, the time lag between the peaks of grip and load forces was significantly longer in individuals with MS. Conclusion. The application of excessive grip force could predispose individuals with MS to additional fatigue and musculoskeletal overuse trauma. Rehabilitation protocols for the MS population may need to account for increased levels of grip force applied during the performance of functional tasks.
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Affiliation(s)
- Veena Iyengar
- Department of Physical Therapy, University of Illinois at Chicago
| | - Marcio J. Santos
- Department of Physical Therapy, University of Illinois at Chicago
| | - Michael Ko
- Department of Neurology, Loyola University Chicago, Illinois
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Grip force adaptation in manipulation activities performed under different coating and grasping conditions. Neurosci Lett 2009; 457:16-20. [DOI: 10.1016/j.neulet.2009.03.108] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 03/31/2009] [Accepted: 03/31/2009] [Indexed: 11/23/2022]
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Effect of contralateral finger touch on grip force control in individuals with multiple sclerosis. Clin Neurophysiol 2009; 120:626-31. [DOI: 10.1016/j.clinph.2008.12.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Revised: 12/10/2008] [Accepted: 12/15/2008] [Indexed: 11/18/2022]
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de Freitas PB, Jaric S. Force coordination in static manipulation tasks performed using standard and non-standard grasping techniques. Exp Brain Res 2009; 194:605-18. [PMID: 19247643 DOI: 10.1007/s00221-009-1738-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2008] [Accepted: 02/07/2009] [Indexed: 11/24/2022]
Affiliation(s)
- Paulo B de Freitas
- Human Performance Lab, Department of Health, Nutrition, and Exercise Sciences, University of Delaware, 547 South College Avenue, Newark, DE 19716, USA
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Krishnan V, Jaric S. Hand function in multiple sclerosis: force coordination in manipulation tasks. Clin Neurophysiol 2008; 119:2274-81. [PMID: 18760664 DOI: 10.1016/j.clinph.2008.06.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2008] [Revised: 06/18/2008] [Accepted: 06/22/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To evaluate the methodology for exploring the specific aspects of functional impairment in multiple sclerosis (MS) through the pattern of forces exerted in various manipulation tasks. METHODS Twelve mildly involved MS patients (EDSS 2.5-5.5) and 12 healthy controls performed various static and dynamic manipulation tasks with an instrumented device that recorded the grip (G; normal to the digit device contact area) and load force (L; tangential force that causes lifting). RESULTS MS patients consistently displayed lower indices of task performance (as assessed by the ability to produce the required L profiles) and force coordination (as assessed by G/L ratio, coupling of G and L, and G modulation) than the healthy controls across all tested tasks. CONCLUSIONS The applied methodology could be sensitive enough to detect the hand dysfunction in mildly involved individuals with MS. Particularly recommended for future evaluations of the impairment of hand function could be a simple lifting task and the static task of tracing a gradually changing L, as well as the variables depicting both the task performance and G/L ratio. SIGNIFICANCE The applied methodology could be developed into a standard clinical test for the assessment of hand function in MS and, possibly, in other neurological diseases.
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Affiliation(s)
- Vennila Krishnan
- Department of Health, Nutrition, and Exercise Sciences, Human Performance Lab, University of Delaware, 541 S. College Avenue, Newark, DE 19716, USA
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Force coordination in static manipulation: discerning the contribution of muscle synergies and cutaneous afferents. Neurosci Lett 2008; 434:234-9. [PMID: 18313221 DOI: 10.1016/j.neulet.2008.01.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2007] [Revised: 01/24/2008] [Accepted: 01/30/2008] [Indexed: 11/24/2022]
Abstract
Both an elaborate coordination of the hand grip force (G; normal component of force acting at the digits-object contact area) and load force (L; tangential component), and the role of cutaneous afferents in G-L coordination have been well documented in a variety of manipulation tasks. However, our recent studies revealed that G-L coordination deteriorates when L consecutively changes direction (bidirectional tasks; e.g., when vigorously shaking objects or using tools). The aim of the study was to distinguish between the possible role of the synergy of hand grip and arm muscles (exerting G and L, respectively) and the role of cutaneous afferent input in the observed phenomenon. Subjects (N=14) exerted sinusoidal L pattern in vertical direction against an externally fixed device in trials that gradually changed from uni- to fully bidirectional. In addition, a manipulation of an external arm support decoupled L measured by the device (and, therefore, recorded by the cutaneous receptors) from the action of arm muscles exerting L. The results revealed that switching from uni- to bidirectional tasks, no matter how low and brief L exertion was in the opposite direction, was associated with an abrupt decrease in G-L coordination. This coordination remained unaffected by the manipulation of external support. The first result corroborates our previous conclusion that the force coordination in uni- and bidirectional manipulation tasks could be based on partly different neural control mechanisms. However, the second finding suggests that the studied control mechanisms could depend more on the cutaneous afferent input, rather than on the synergy of the muscles exerting G and L.
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