Considerando-se o atual estagio de desenvolvimento das máquinas elétricas, tanto em termos de ferramentas computacionais auxiliares nas simulações e nos projetos, quanto de materiais e sistemas eletrônicos de acionamento e controle, propõe neste trabalho a construção de um dispositivo eletromecânico, na classe dos motores elétricos lineares, que atenda as necessidades e se aplique a bioengenharia, mais propriamente as próteses de membro superior, na forma de acionador translacional. Este dispositivo deve substituir os sistemas que utilizam motores elétricos rotativos com mecanismos de adaptação mecânica (roldanas, vários fios, redutores), que convertem o movimento rotacional em linear. Também, os dispositivos híbridos, como atuadores eletro-hidráulicos e eletropneumáticos, que necessitam de fontes de energia de naturezas diferentes da eletroeletrônica, podem ser substituídos pelas maquinas elétricas lineares. Uma revisão dos conceitos relacionados a área de bioengenharia e feita, destacando-se os mecanismos de transmissão existentes. E apresentada uma analise comparativa entre os principais motores lineares, enfatizando-se as características construtivas, as vantagens e as desvantagens de cada um, relacionados a aplicação. A escolha da maquina a ser projetada e construída recaiu no motor linear síncrono, com imas permanentes na superfície da parte móvel, em uma estrutura tubular. Para esta maquina, e exposta uma metodologia de projeto, baseando-se nos seguintes tópicos: equacionamento do circuito magnético, cálculos de parâmetros utilizando-se o método dos elementos finitos e modelagem matemática por meio das equações por fase. Apos a etapa teórica, a construção da maquina e apresentada juntamente com os ensaios experimentais, possibilitando a comparação das características reais em relação ao projeto inicial. Por fim, o motor e aplicado ao dedo artificial, verificando-se a sua capacidade de substituição do motor rotativo. / By means of the latest technological advances of the electrical machines, both in terms of computational aids in simulations and designs, materials and electronic systems of drive and control, this work put forward the construction of an electromechanical device, in the class of the linear motors. It will be applied to bioengineering area, in particular in upper limb prostheses, in the form of a translational actuator. This linear motor must substitute the systems that use electric rotational motors with planetary gears and lead screw transmission, to convert the rotational movement into linear. The hybrid mechanisms, like electro pneumatic/hydraulic actuators, which need energy sources different from electronics, can be changed for the linear electric machines too. A review about bioengineering topics is done, where the existent mechanical mechanisms are highlighted. According to the application necessities, the advantages and disadvantages of different topologies of electric linear machines are compared and the constructive characteristics are emphasized. The tubular linear synchronous motor, with permanent magnets on the surface of the mobile part, was chosen to be applied to hand prostheses. To this machine, a design methodology is presented for calculating the motor dimensions, based on the following subjects: magnetic circuit equating, finite element analyses to evaluate parameters and machine dynamic modeling. After the theorethical stage, the construction of the machine is presented with the experimental results, allowing comparisons between the real characteristics and the initial design features of the motor. Finally, the machine is applied to an artificial finger to verify its capability to replace the rotational motor.

Considerando-se o atual estagio de desenvolvimento das máquinas elétricas, tanto em termos de ferramentas computacionais auxiliares nas simulações e nos projetos, quanto de materiais e sistemas eletrônicos de acionamento e controle, propõe neste trabalho a construção de um dispositivo eletromecânico, na classe dos motores elétricos lineares, que atenda as necessidades e se aplique a bioengenharia, mais propriamente as próteses de membro superior, na forma de acionador translacional. Este dispositivo deve substituir os sistemas que utilizam motores elétricos rotativos com mecanismos de adaptação mecânica (roldanas, vários fios, redutores), que convertem o movimento rotacional em linear. Também, os dispositivos híbridos, como atuadores eletro-hidráulicos e eletropneumáticos, que necessitam de fontes de energia de naturezas diferentes da eletroeletrônica, podem ser substituídos pelas maquinas elétricas lineares. Uma revisão dos conceitos relacionados a área de bioengenharia e feita, destacando-se os mecanismos de transmissão existentes. E apresentada uma analise comparativa entre os principais motores lineares, enfatizando-se as características construtivas, as vantagens e as desvantagens de cada um, relacionados a aplicação. A escolha da maquina a ser projetada e construída recaiu no motor linear síncrono, com imas permanentes na superfície da parte móvel, em uma estrutura tubular. Para esta maquina, e exposta uma metodologia de projeto, baseando-se nos seguintes tópicos: equacionamento do circuito magnético, cálculos de parâmetros utilizando-se o método dos elementos finitos e modelagem matemática por meio das equações por fase. Apos a etapa teórica, a construção da maquina e apresentada juntamente com os ensaios experimentais, possibilitando a comparação das características reais em relação ao projeto inicial. Por fim, o motor e aplicado ao dedo artificial, verificando-se a sua capacidade de substituição do motor rotativo. / By means of the latest technological advances of the electrical machines, both in terms of computational aids in simulations and designs, materials and electronic systems of drive and control, this work put forward the construction of an electromechanical device, in the class of the linear motors. It will be applied to bioengineering area, in particular in upper limb prostheses, in the form of a translational actuator. This linear motor must substitute the systems that use electric rotational motors with planetary gears and lead screw transmission, to convert the rotational movement into linear. The hybrid mechanisms, like electro pneumatic/hydraulic actuators, which need energy sources different from electronics, can be changed for the linear electric machines too. A review about bioengineering topics is done, where the existent mechanical mechanisms are highlighted. According to the application necessities, the advantages and disadvantages of different topologies of electric linear machines are compared and the constructive characteristics are emphasized. The tubular linear synchronous motor, with permanent magnets on the surface of the mobile part, was chosen to be applied to hand prostheses. To this machine, a design methodology is presented for calculating the motor dimensions, based on the following subjects: magnetic circuit equating, finite element analyses to evaluate parameters and machine dynamic modeling. After the theorethical stage, the construction of the machine is presented with the experimental results, allowing comparisons between the real characteristics and the initial design features of the motor. Finally, the machine is applied to an artificial finger to verify its capability to replace the rotational motor.

The purpose of the present work was to study hand impairments and manual ability in children with cerebral palsy (CP) as well as to clarify their relationship. Appraising the degree of hand impairments requires normative data to differentiate the real dysfunctions of CP children from the normal difficulties according to their age, sex, or handedness. As there is no normative data for gross manual and fine finger dexterity, a first experiment focused on the normal development of manipulative functions was conducted to establish these norms. A second experiment was carried out to develop and validate through the Rasch model a measure of manual ability in children with CP since such a measure was not yet available. The invariance of the ABILHAND-Kids questionnaire was also tested across relevant demographic and clinical subgroups of CP children. Finally, a third experiment was performed to quantify the hand impairments in children with CP and to investigate their relationship with manual ability as measured with the ABILHAND-Kids questionnaire. Hand motor impairments, markedly more prevalent than hand sensory impairments, were moderately correlated with manual ability measures and predicted 58% of their variance. Consequently, manual ability cannot simply be inferred from hand impairments and should be measured and treated per se. / L'objectif de ce travail était d'étudier les déficiences de la main et l'habileté manuelle chez les enfants infirmes moteurs d'origine cérébrale (IMOC) ainsi que de clarifier leur relation. Apprécier la gravité des déficiences de la main nécessite des données normatives afin de différencier les dysfonctionnements réels des enfants IMOC des difficultés normales compte tenu de leur âge, sexe, ou latéralité. Etant donné l'absence de normes quant à la dextérité manuelle grossière et la dextérité digitale fine, une première étude a été réalisée afin d'examiner le développement normal de ces deux types de dextérité. Des normes sur les dextérités manuelle grossière et digitale fine ont ainsi pu être établies. Une deuxième étude a été effectuée afin de développer et valider à travers le modèle de Rasch une mesure de l'habileté manuelle chez les enfants IMOC. L'invariance du questionnaire ABILHAND-Kids a également testée à travers différents sous-groupes démographiques et cliniques d'enfants IMOC. Enfin, une troisième étude a été réalisée afin de quantifier les déficiences de la main chez les enfants IMOC et d'investiguer leur relation avec l'habileté manuelle. Les déficiences motrices de la main, plus prévalentes que les déficiences sensitives, étaient modérément corrélées avec les mesures d'habileté manuelle et prédisaient 58% de leur variance. En conséquence, l'habileté manuelle ne peut être simplement inférée à partir des déficiences de la main et devrait donc être mesurée et traitée pour elle-même.

The purpose of the present work was to study hand impairments and manual ability in children with cerebral palsy (CP) as well as to clarify their relationship. Appraising the degree of hand impairments requires normative data to differentiate the real dysfunctions of CP children from the normal difficulties according to their age, sex, or handedness. As there is no normative data for gross manual and fine finger dexterity, a first experiment focused on the normal development of manipulative functions was conducted to establish these norms. A second experiment was carried out to develop and validate through the Rasch model a measure of manual ability in children with CP since such a measure was not yet available. The invariance of the ABILHAND-Kids questionnaire was also tested across relevant demographic and clinical subgroups of CP children. Finally, a third experiment was performed to quantify the hand impairments in children with CP and to investigate their relationship with manual ability as measured with the ABILHAND-Kids questionnaire. Hand motor impairments, markedly more prevalent than hand sensory impairments, were moderately correlated with manual ability measures and predicted 58% of their variance. Consequently, manual ability cannot simply be inferred from hand impairments and should be measured and treated per se. / L'objectif de ce travail était d'étudier les déficiences de la main et l'habileté manuelle chez les enfants infirmes moteurs d'origine cérébrale (IMOC) ainsi que de clarifier leur relation. Apprécier la gravité des déficiences de la main nécessite des données normatives afin de différencier les dysfonctionnements réels des enfants IMOC des difficultés normales compte tenu de leur âge, sexe, ou latéralité. Etant donné l'absence de normes quant à la dextérité manuelle grossière et la dextérité digitale fine, une première étude a été réalisée afin d'examiner le développement normal de ces deux types de dextérité. Des normes sur les dextérités manuelle grossière et digitale fine ont ainsi pu être établies. Une deuxième étude a été effectuée afin de développer et valider à travers le modèle de Rasch une mesure de l'habileté manuelle chez les enfants IMOC. L'invariance du questionnaire ABILHAND-Kids a également testée à travers différents sous-groupes démographiques et cliniques d'enfants IMOC. Enfin, une troisième étude a été réalisée afin de quantifier les déficiences de la main chez les enfants IMOC et d'investiguer leur relation avec l'habileté manuelle. Les déficiences motrices de la main, plus prévalentes que les déficiences sensitives, étaient modérément corrélées avec les mesures d'habileté manuelle et prédisaient 58% de leur variance. En conséquence, l'habileté manuelle ne peut être simplement inférée à partir des déficiences de la main et devrait donc être mesurée et traitée pour elle-même.

Les troubles musculo-squelettiques du membre supérieur (TMS-MS) peuvent avoir un impact négatif sur l'autonomie d’une personne. À ce jour, il n’existe pas d’outils en français évaluant les limitations d'activités et les restrictions de participation, disposant de bonnes propriétés métrologiques et d'applicabilité dans un contexte clinique marqué par des contraintes de temps. L’Upper Limb Functional Index (ULFI), qui présente de bonnes qualités métrologiques et applicabilité clinique adéquate, s'avère un outil intéressant pour les ergothérapeutes de par son approche centrée sur la personne. Toutefois, il n'était disponible qu'en anglais et en espagnol. La présente recherche, constituée de deux études, visait à adapter l’ULFI à la population canadienne française et à évaluer ses propriétés métrologiques et son applicabilité clinique. La première étude a examiné sa cohérence interne, sa validité convergente et son applicabilité clinique auprès de 50 patients bilingues atteints de TMS-MS. La seconde étude visait à analyser sa fidélité test-retest et sa sensibilité au changement auprès de 60 patients francophones. Les résultats ont révélé que l'ULFI-CF possède des propriétés métrologiques solides : une cohérence interne élevée (α de Cronbach = 0,93), une excellente fidélité test-retest (CCI = 0,87-0,95), une excellente validité convergente (r = 0,70-0,85) et une sensibilité au changement de bonne à excellente (tailles d'effet = 0,49-0,88 et r = 0,64 pour la section 1). L'ULFI-CF démontre également une bonne applicabilité clinique. En conclusion, l’ULFI-CF s’avère un outil pertinent pour les cliniciens œuvrant auprès d’une clientèle canadienne française souffrant d'un TMS-MS dans un contexte clinique marqué par des contraintes de temps. / Upper limb musculoskeletal disorders (UL-MSD) can negatively impact on patients' autonomy. There are no existing outcome measures available in French to assess activity limitations and participation restrictions caused by UL-MSD that have sound metrological properties and are applicable in a clinical context where clinicians have limited assessment time for each patient. The Upper Limb Functional Index (ULFI), having good metrological qualities and clinical applicability, is a relevant tool for clinicians since it promotes a patient-centered approach. However, the tool was only available in English and Spanish until now. This research project included two studies and aimed at adapting the ULFI to the French Canadian population and to assess the metrological properties of the adapted version (ULFI-FC) and its clinical applicability. The first study examined its internal consistency, convergent validity and clinical applicability among 50 bilingual patients with UL-MSD. The second study aimed to analyse its test-retest reliability and responsiveness among 60 French-speaking patients. The findings revealed that the ULFI-FC possesses sound metrological properties: a high internal consistency (Cronbach α = 0.93 for Part 1), an excellent test-retest reliability (ICC = 0.87-0.95), an excellent convergent validity (r = 0.70-0.85), and good to excellent responsiveness (effect size = 0.49-0.88; and r = 0.64 for Part 1), as well as good clinical applicability in a context where assessment time devoted to each patient is limited. In conclusion, the ULFI-CF is a relevant and attractive tool assessing activity limitations and participation restrictions for clinicians working with French Canadian UL-MSD patients in a busy clinical setting.

The work environment of today is synonymous with stress, fatigue and exhaustion. As a result, the incidence of workplace injury and disease is increasingly commonplace. Repetitive Strain Injury (RSI) is the most common form of work–related ill–health. If the symptoms are not recognised and addressed early, serious and more chronic manifestations of the symptoms can emerge, subsequently affecting the quality and duration of a persons' working life. RSI also has significant implications for organisations in terms of lost productivity, drops in work quality and costly compensation claims. Although there is ongoing international research available concerning workplace injury and disease to inform business and the employee, there is less comprehensive and regularly updated research within the South African context. Considering employers can be held accountable for diseases that have arisen out of and in the course of an individual's employment, this research adds value in ascertaining the magnitude of RSI in South Africa. Bearing in mind international research has expanded its focus to include the potential influence of ergonomic and psychosocial factors in the development of RSI, it has become necessary to consider additional factors that may play a role in the development and maintenance of RSI. The objectives of this study were to 1) determine the frequency of RSI experienced amongst South African employees; 2) examine the frequency of RSI across three well–being groups; and 3) identify whether there are significant differences across the three well–being groups. An availability sample (N = 15 664) was utilised to determine the frequency of experience of RSI in a sample of South African employees. Frequencies were used to determine the incidence of RSI symptoms for the total sample. Participants were then selected into groups based on their experience of vitality, work devotion and exhaustion (n = 4 411) in order to determine the frequency of RSI experienced for three well–being groups. ANOVA was used to determine if there were significant RSI differences between these three well–being groups. The results of this study highlight that RSI is prevalent amongst the South African population. Of those participants who responded 'sometimes' and 'frequently' (experiencing RSI), 47% indicated experiencing neck, shoulder and back discomfort, followed by 42% reporting eyestrain, and 24% muscle stiffness. These results are comparable with international statistics, indicating that a relatively large percentage of South African employees experience RSI. The results further showed that the frequency of experience of RSI symptoms does differ across the three well–being groups. It is evident that RSI is more prevalent in the well–being group that demonstrates vital exhaustion when compared to those who are work engaged yet exhausted, and those who are truly work engaged. Secondly, the results clearly revealed statistically significant differences between all of these groups. Thus, those individuals who are vitally exhausted experience significantly greater RSI symptoms than those who are truly work engaged or engaged with exhaustion. In addition, those individuals who are work engaged with exhaustion demonstrate significantly more RSI symptoms than those who are truly work engaged. Thus, this study suggests the potential role of exhaustion in the development of RSI. Recommendations were made for the organisation and for future research. / Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2011.

The work environment of today is synonymous with stress, fatigue and exhaustion. As a result, the incidence of workplace injury and disease is increasingly commonplace. Repetitive Strain Injury (RSI) is the most common form of work–related ill–health. If the symptoms are not recognised and addressed early, serious and more chronic manifestations of the symptoms can emerge, subsequently affecting the quality and duration of a persons' working life. RSI also has significant implications for organisations in terms of lost productivity, drops in work quality and costly compensation claims. Although there is ongoing international research available concerning workplace injury and disease to inform business and the employee, there is less comprehensive and regularly updated research within the South African context. Considering employers can be held accountable for diseases that have arisen out of and in the course of an individual's employment, this research adds value in ascertaining the magnitude of RSI in South Africa. Bearing in mind international research has expanded its focus to include the potential influence of ergonomic and psychosocial factors in the development of RSI, it has become necessary to consider additional factors that may play a role in the development and maintenance of RSI. The objectives of this study were to 1) determine the frequency of RSI experienced amongst South African employees; 2) examine the frequency of RSI across three well–being groups; and 3) identify whether there are significant differences across the three well–being groups. An availability sample (N = 15 664) was utilised to determine the frequency of experience of RSI in a sample of South African employees. Frequencies were used to determine the incidence of RSI symptoms for the total sample. Participants were then selected into groups based on their experience of vitality, work devotion and exhaustion (n = 4 411) in order to determine the frequency of RSI experienced for three well–being groups. ANOVA was used to determine if there were significant RSI differences between these three well–being groups. The results of this study highlight that RSI is prevalent amongst the South African population. Of those participants who responded 'sometimes' and 'frequently' (experiencing RSI), 47% indicated experiencing neck, shoulder and back discomfort, followed by 42% reporting eyestrain, and 24% muscle stiffness. These results are comparable with international statistics, indicating that a relatively large percentage of South African employees experience RSI. The results further showed that the frequency of experience of RSI symptoms does differ across the three well–being groups. It is evident that RSI is more prevalent in the well–being group that demonstrates vital exhaustion when compared to those who are work engaged yet exhausted, and those who are truly work engaged. Secondly, the results clearly revealed statistically significant differences between all of these groups. Thus, those individuals who are vitally exhausted experience significantly greater RSI symptoms than those who are truly work engaged or engaged with exhaustion. In addition, those individuals who are work engaged with exhaustion demonstrate significantly more RSI symptoms than those who are truly work engaged. Thus, this study suggests the potential role of exhaustion in the development of RSI. Recommendations were made for the organisation and for future research. / Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2011.

Chronic neck-shoulder pain is associated with impairments of proprioception and motor control. Thus, assessment of proprioceptive and motor function may be powerful tools both for research and clinical practice. However, insufficient knowledge of certain features of human sensorimotor control hampers both development and interpretation of results of clinically relevant tests. For example, evidence is lacking which proprioception submodalities are reflected in common tests of proprioception. For testing motor function, a better understanding of the control of goal directed arm movements is needed. The purpose of the thesis was to gain further insights into the sensorimotor control of the upper limb in healthy subjects, with implications for clinical testing. The main aims were: (1) to study relationships of outcomes of different tests of shoulder proprioception and (2) to study control strategies in bimanual pointing tasks by analysis of the structure of joint angle variability with the Uncontrolled Manifold (UCM) method. Correlations between proprioceptive acuity in different variants of ipsilateral position-matching and velocity-discrimination were studied. The main finding was that two uncorrelated mechanisms based either on perception of position or movement might underlie perception of limb location in ipsilateral position-matching. The results provided important information for interpretation of common and development of novel tests of shoulder proprioception. The structure of joint angle variance was computed with respect to several task variables during bimanual pointing. Joint angle variability was decomposed in variance affecting and not affecting a task variable. The results showed that the variance in joint space was structured according to the predictions of the UCM hypothesis. It was also shown that the arms were united into one synergy to significantly larger degree than joints within each arm were united into single-arm synergies. It was concluded that the UCM approach might quantify components of motor variability during repetitive motor tasks.

A finalidade desse trabalho é desenvolver um protótipo de uma prótese antropomórfica multifuncional para membros superiores para pacientes amputados. Seu objetivo é substituir a mão natural perdida, de forma a auxiliar a realização de algumas tarefas diárias do usuário. A prótese possuirá características antropomórficas, tais como aparência e movimentação semelhantes às da mão humana, e características naturais inerentes à mesma, por exemplo, o arco reflexo. Além disso, contará também com meios de realimentação táteis das informações de forças aplicadas pela prótese em objetos, bem como sua temperatura para o paciente, suprindo assim uma das carências das próteses convencionais. Esse dispositivo terá incorporado na sua construção sensores diversos para realizar as funções propostas e contará com um algoritmo baseado em redes neurais artificiais, capaz de identificar padrões dos sinais mioelétricos do paciente, que serão utilizados como sinais de controle, possibilitando ao paciente um comando natural. Todas essas implementações visam contribuir para a redução da taxa de rejeição de próteses para membros superiores e possibilitar uma maior reabilitação e reintegração do paciente à sociedade. / The purpose of this assignment is to develop a multifunctional and anthropomorphic upper limb prosthesis prototype for amputated patients. Its objective is to substitute the natural lost hand, in a way to improve the performance of regular activities. This prosthesis will have anthropomorphic characteristics, like appearance and movement, similar to the ones of the human hand, and natural characteristics inherent to it, for example the reflected arc. Another characteristic will be the tactile feedback ways of obtaining the information of the forces applied by the prosthesis in objects, as well as their temperature for the patient, overcoming therefore one of the traditional prosthesis\' deficiency. This device will have incorporated in its construction many sensors in order to do the proposed functions and it will use an algorithm based on the artificial neural network that is able to recognize patterns of myoelectric signals of the patient, which will be used as control signals, making possible to the patient a natural command. All of these implementations objective to contribute for the reduction of the rejection rate of prostheses for upper limb members and make possible a better rehabilitation and reintegration of the patient in the society.

Ces dernières années, des travaux importants ont été observés dans le développement du contrôle prothétique afin d'aider les personnes amputées du membre supérieur à améliorer leur qualité de vie au quotidien. Certaines prothèses myoélectriques modernes des membres supérieurs disponibles dans le commerce ont de nombreux degrés de liberté et nécessitent de nombreux signaux de contrôle pour réaliser plusieurs tâches fréquemment utilisées dans la vie quotidienne. Pour obtenir plusieurs signaux de contrôle, de nombreux muscles sont requis mais pour les personnes ayant subi une amputation du membre supérieur, le nombre de muscles disponibles est plus ou moins réduit selon le niveau de l’amputation. Pour accroître le nombre de signaux de contrôle, nous nous sommes intéressés au biceps brachial, vu qu’anatomiquement il est formé de 2 chefs et que de la présence de compartiments a été observée sur sa face interne. Physiologiquement, il a été trouvé que les unités motrices du biceps sont activées à différents endroits du muscle lors de la production de diverses tâches fonctionnelles. De plus, il semblerait que le système nerveux central puisse se servir de la synergie musculaire pour arriver à facilement produire plusieurs mouvements. Dans un premier temps on a donc identifié que la synergie musculaire était présente chez le biceps de sujets normaux et on a montré que les caractéristiques de cette synergie permettaient d’identifier la posture statique de la main lorsque les signaux du biceps avaient été enregistrés. Dans un deuxième temps, on a réussi à démontrer qu’il était possible, dans un cube présenté sur écran, à contrôler la position d’une sphère en vue d’atteindre diverses cibles en utilisant la synergie musculaire du biceps. Les techniques de classification utilisées pourraient servir à faciliter le contrôle des prothèses myoélectriques. / In recent years, important work has been done in the development of prosthetic control to help upper limb amputees improve their quality of life on a daily basis. Some modern commercially available upper limb myoelectric prostheses have many degrees of freedom and require many control signals to perform several tasks commonly used in everyday life. To obtain several control signals, many muscles are required, but for people with upper limb amputation, the number of muscles available is more or less reduced, depending on the level of amputation. To increase the number of control signals, we were interested in the biceps brachii, since it is anatomically composed of 2 heads and the presence of compartments was observed on its internal face. Physiologically, it has been found that the motor units of the biceps are activated at different places of the muscle during production of various functional tasks. In addition, it appears that the central nervous system can use muscle synergy to easily produce multiple movements. In this research, muscle synergy was first identified to be present in the biceps of normal subjects, and it was shown that the characteristics of this synergy allowed the identification of static posture of the hand when the biceps signals had been recorded. In a second investigation, we demonstrated that it was possible in a virtual cube presented on a screen to control online the position of a sphere to reach various targets by using muscle synergy of the biceps. Classification techniques have been used to improve the classification of muscular synergy features, and these classification techniques can be integrated with control algorithm that produces dynamic movement of myoelectric prostheses to facilitate the training of prosthetic control.