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The objective of this study was to evaluate the usefulness of AM-FM features extracted from surface electromyographic (SEMG) signals for the assessment of neuromuscular disorders at different force levels. SEMG signals were recorded from a total of 40 subjects, 20 normal and 20 patients, at 10%, 30%, 50%, 70% and 100% of maximum voluntary contraction (MVC), from the biceps brachii muscle. From the...
Clinical tests used to rate the severity of bradykinesia in patients with Parkinson's disease generally involve self-initiated and self-maintained repetitive movements (e.g. finger-tapping). This is based on evidence that movement impairment is exacerbated by the removal of external timing cues or performance feedback (i.e. internally generated movements). Typically performance is rated subjectively...
Tremor can be a severely disabling symptom. It occurs in patients with many movement disorders including Parkinson's disease (PD) and essential tremor (ET). Physical tremor can be measured with a variety of instruments including electromyograms (EMG) and accelerometers. Neural tremor can be measured by microelectrodes placed near nerve cells or obtained from brain cells during stereotactic neurosurgery...
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