RESUMEN
In order to help the patients with upper-limb disfunction go on rehabilitation training,this paper proposed an upper-limb exoskeleton rehabilitation robot with four degrees of freedom(DOF),and realized two control schemes,i.e.,voice control and electromyography control.The hardware and software design of the voice control system was completed based on RSC-4128 chips,which realized the speech recognition technology of a specific person.Besides,this study adapted self-made surface eletromyogram(sEMG)signal extraction electrodes to collect sEMG signals and realized pattern recognition by conducting sEMG signals processing,extracting time domain features and fixed threshold algorithm.In addition,the pulse-width modulation(PWM)algorithm was used to realize the speed adjustment of the system.Voice control and electromyography control experiments were then carried out,and the results showed that the mean recognition rate of the voice control and electromyography control reached 93.1%and 90.9%,respectively.The results proved the feasibility of the control system.This study is expected to lay a theoretical foundation for the further improvement of the control system of the upper-limb rehabilitation robot.
Asunto(s)
Dispositivo Exoesqueleto , Rehabilitación , Robótica , Extremidad Superior/fisiopatología , Algoritmos , Electrodos , Electromiografía , Humanos , Procesamiento de Señales Asistido por Computador , Programas Informáticos , HablaRESUMEN
Background: Compared to conventional therapies, sacral neuromodulation (SNM) may offer an alternative, non-destructive treatment for SCI patients with bladder dysfunction. Understanding bladder response to SNM treatment for SCI in different phases may yield new insights for innovative use of this promising technique. Materials and Methods: Female Sprague-Dawley rats were used in this study to examine the effects of acute SNM on bladder reflex in complete SCI rats. All rats were anesthetized and set up for continuous saline infusion. Acute SNM treatment was implemented for about 6 hours for each rat. Cystometric parameters, including time between contractions, contraction duration, bladder peak pressure, and number of uninhibited contractions, were analyzed and compared within rats before and after SNM treatment. Results: For the spinally transected rats during early phase (less than two weeks post spinalization), the time between contractions and contraction duration both increased after SNM treatments, yet the increased amplitude was about or less than 20%. For the spinally transected rats with a longer days survival (about two to four weeks post spinalization), the time between contractions and contraction duration substantially increased after SNM treatment and the changes for their average values were more than 90%. For the spinally transected rats with a much longer days survival (more than five weeks post spinalization), the time between contractions and contraction duration increased after SNM treatments, yet the magnitude of changes were less than 30%. Conclusion: The present study suggested that the significant effectiveness of SNM for complete SCI played its role after the spinal shock phase and prior to the development of detrusor overactivity. It indicated that the time point of SNM treatment is necessary to be paid attention.
Asunto(s)
Animales , Femenino , Sacro/fisiopatología , Traumatismos de la Médula Espinal/fisiopatología , Traumatismos de la Médula Espinal/terapia , Estimulación de la Médula Espinal/métodos , Vejiga Urinaria/fisiopatología , Modelos Animales de Enfermedad , Síntomas del Sistema Urinario Inferior/etiología , Síntomas del Sistema Urinario Inferior/prevención & control , Contracción Muscular/fisiología , Ratas Sprague-Dawley , Reproducibilidad de los Resultados , Traumatismos de la Médula Espinal/complicaciones , Factores de Tiempo , Resultado del TratamientoRESUMEN
BACKGROUND: Compared to conventional therapies, sacral neuromodulation (SNM) may offer an alternative, non-destructive treatment for SCI patients with bladder dysfunction. Understanding bladder response to SNM treatment for SCI in different phases may yield new insights for innovative use of this promising technique. MATERIALS AND METHODS: Female Sprague-Dawley rats were used in this study to examine the effects of acute SNM on bladder reflex in complete SCI rats. All rats were anesthetized and set up for continuous saline infusion. Acute SNM treatment was implemented for about 6 hours for each rat. Cystometric parameters, including time between contractions, contraction duration, bladder peak pressure, and number of uninhibited contractions, were analyzed and compared within rats before and after SNM treatment. RESULTS: For the spinally transected rats during early phase (less than two weeks post spinalization), the time between contractions and contraction duration both increased after SNM treatments, yet the increased amplitude was about or less than 20%. For the spinally transected rats with a longer days survival (about two to four weeks post spinalization), the time between contractions and contraction duration substantially increased after SNM treatment and the changes for their average values were more than 90%. For the spinally transected rats with a much longer days survival (more than five weeks post spinalization), the time between contractions and contraction duration increased after SNM treatments, yet the magnitude of changes were less than 30%. CONCLUSION: The present study suggested that the significant effectiveness of SNM for complete SCI played its role after the spinal shock phase and prior to the development of detrusor overactivity. It indicated that the time point of SNM treatment is necessary to be paid attention.
Asunto(s)
Sacro/fisiopatología , Traumatismos de la Médula Espinal/fisiopatología , Traumatismos de la Médula Espinal/terapia , Estimulación de la Médula Espinal/métodos , Vejiga Urinaria/fisiopatología , Animales , Modelos Animales de Enfermedad , Femenino , Síntomas del Sistema Urinario Inferior/etiología , Síntomas del Sistema Urinario Inferior/prevención & control , Contracción Muscular/fisiología , Ratas Sprague-Dawley , Reproducibilidad de los Resultados , Traumatismos de la Médula Espinal/complicaciones , Factores de Tiempo , Resultado del TratamientoRESUMEN
The number of people with physical disabilities is increasing year by year, and the trend of population aging is more and more serious. In order to improve the quality of the life, a control system of accessible home environment for the patients with serious disabilities was developed to control the home electrical devices with the voice of the patients. The control system includes a central control platform, a speech recognition module, a terminal operation module, etc. The system combines the speech recognition control technology and wireless information transmission technology with the embedded mobile computing technology, and interconnects the lamp, electronic locks, alarms, TV and other electrical devices in the home environment as a whole system through a wireless network node. The experimental results showed that speech recognition success rate was more than 84% in the home environment.
Asunto(s)
Computadores , Software de Reconocimiento del Habla , Tecnología Inalámbrica , Personas con Discapacidad , HumanosRESUMEN
Asymmetrical load carriage is a popular method used among people in daily life. This study investigated the impact of asymmetrical load carriage and the load mass spatiotemporal parameters associated with gait patterns. Twelve participants were recorded as they walked under six load conditions. The loads included a control condition in which individuals carried no added load and loads of 10%, 15%, 20%, 25%, and 30% body weight carried with their right hand. Parameters used to describe the spatiotemporal characteristics of gait were quantified and analyzed. The results of the study demonstrated that the gait patterns of the individuals were affected by increases in the carried load. The loaded right side was more sensitive to changes in the loads carried. Overall, we conclude that the spatiotemporal parameters actually depend on the combination of both loading mass and the side that was loaded.