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In order to fulfill the design requirements of motor evoked potential (MEP) stimulator in intraoperative neurophysiological monitoring (IONM) system, a kind of constant voltage pulse (CVP) stimulator has been designed. Two Flyback switching power supply (FSPS) circuits based on UC3845 provide the needed voltages. A transistor control circuit ensures that the voltage output is constant. An IGBT works...
The aim of this study was to investigate the technique of Topographical mapping of first dorsal interosseous (FDI) muscle response after Single pulse Trans cranial Magnetic stimulation (TMS), in a single normal subject, to study inter hemispheric symmetry of plasticity of motor cortex. TMS induced motor evoked potential (MEP) over an area of motor cortex was mapped in two dimensional space using pseudo...
The aim of this paper is to study the characteristic of latency of evoked potential and monitoring brain function following acute ischemic stroke in rats. The model of acute ischemic stroke in rats was made by middle cerebral artery occlusion (MCAO). All animals of ischemic stroke were detected latency of somatosensory evoked potential (SEP) and motor evoked potential (MEP) after different durations...
We developed a precise coil positioning system for determining stimulated sites in transcranial magnetic stimulation (TMS) by using a multi-articular mechanical arm. A figure-of-eight coil used in TMS can induce a focal electric field beneath the coils center in the cortex; therefore, the point on the cortex beneath the center of the figure-of-eight coil has been conventionally regarded as a stimulating...
We proposed an artificial neural network to confirm the location of stimulating coil in transcranial magnetic stimulation (TMS) from data of finger force and electromyography (EMG). In experiments, finger forces of the right index finger and motor evoked potentials (MEPs) of the muscles involved in the generation of the finger forces were measured when the primary motor cortex in the left hemisphere...
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