Objectives: Cerebral palsy (CP) describes a group of disorders in the development of movement and posture in the developing brain. The main aim of this study was to determine the distribution of motor impairment and associated disorders in a population of children with CP. Methods: This study was carried out in 2011 during three months, on 200 CP children. Multiple sources of ascertainment w...

During dynamic or sustained isometric contractions, bursts of muscle activity appear in the electromyography (EMG) signal. Theoretically, these bursts of activity likely occur because motor units are constrained to fire temporally close to one another and thus the impulses are "clustered" with short delays to elicit bursts of muscle activity. The purpose of this study was to investigate whether...

Pathologic progression in amyotrophic lateral sclerosis (ALS) results from motor neuron death, while the clinical expression also reflects the compensatory effects of collateral reinnervation consequent to lower motor neuron loss. In a cross-sectional study of ALS subjects, we made comparisons between motor unit number estimation (MUNE) values and several measures reflecting collateral reinnerv...

The purpose of the study was to evaluate the influence of selected physiological parameters on amplitude cancellation in the simulated surface electromyogram (EMG) and the consequences for spike-triggered averages of motor unit potentials derived from the interference and rectified EMG signals. The surface EMG was simulated from prescribed recruitment and rate coding characteristics of a motor ...

The aim of this study was to analyze the effect of ischemia on low-threshold motor unit conduction velocity. Nine subjects were trained to isolate the activity of a single motor unit (target motor unit) in the abductor pollicis brevis muscle with feedback on surface EMG signals recorded with a 16-electrode linear array. After training, the subjects activated the target motor unit at approximate...

Electromyography (EMG) is a technique that gives information about the neuromuscular pattern and function which commonly-used in practice of neurology. With this method, signals obtained from muscle cells using an amplificatore are enhanced to amount enough study on. The potentials monitored called Motor Unit Action Potentials (MUAPs). In study, findings gathered by simulation dipole model for ...

21 Oscillatory activity plays a crucial role in corticospinal control of muscle synergies 22 and is widely investigated using corticospinal and intermuscular synchronization. 23 However, the neurophysiological mechanisms that translate these rhythmic patterns 24 into surface electromyography (EMG) are not well understood. This is underscored 25 by the ongoing debate on the rectification of surf...