Alcimar Barbosa Soares

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Assistive technology is dedicated to people who suffers from disabilities or pathologies that limit their daily life. It provides support in alternative communication, accessibility, mobility and cognitive domains. An example of this type of technology is the electric wheelchair that allows the person to move more freely and independently. However, most(More)
Tremor is the most common movement disorder and differs from other disorders by its repetitive, stereotyped movements, with regular frequency and amplitude. The three most frequent pathological forms of it are the essential tremor (ET), the Parkinson's disease (PD) tremor, and the enhanced physiological tremor. The ET and PD tremor affect the older(More)
Computer-based training systems have been widely studied in the field of human rehabilitation. In health applications, Virtual Reality presents itself as an appropriate tool to simulate training environments without exposing the patients to risks. In particular, virtual prosthetic devices have been used to reduce the great mental effort needed by patients(More)
Virtual reality technologies enable the creation of environments for the assessment and training of motor deficits using enhanced feedback. This paper reports the development of a virtual reality environment applied toelectromyographic (EMG) biofeedbaclifor motor rehabilitation. It was modeled a 3D arm controlled by the EMG signals from brachial biceps(More)
Differential Evolution (DE) is a tool for efficient optimisation, and it belongs to the class of evolutionary algorithms, which include Evolution Strategies and Genetic Algorithms. DE algorithms work well when the population covers the entire search space, and they have shown to be effective on a large range of classical optimisation problems. However, an(More)
We propose a new method for detecting the onset of the stretch reflex response for assessment of spasticity based on the Tonic Stretch Reflex Threshold (TSRT). Our strategy relies on a three-stage approach to detect the onset of the reflex EMG activity: (i) Reduction of baseline activity by means of Empirical Mode Decomposition; (ii) Extraction of the(More)
Spasticity is a motor disorder that affects over 12 million people worldwide. Its pathophysiology is rather complex and might be caused by cortical problems or spinal cord injury, for example, and involves different circuitries and networks. The measurement of spasticity is very important for providing better support for the patients, both in diagnosis and(More)
Because of the evolution of technology and consequently, the development of advanced techniques, related to signal analysis and digitalization, has increased the use of data from brain electrical activity in clinical analysis and in researches, for example, with the use of the quantitative electroencephalography (EEGq). This is based in techniques of(More)
Biofeedback is a method of self-control of physiological responses through training. These biological responses can be the level of muscle tension, skin temperature, brain activity, heart rate or psychophysiological responses that are characterized by the level of anxiety, stress, relaxation or excitement of a person. Through this information, the(More)