In order to evaluate the significance of motor evoked potentials (MEPs) in central nervous system monitoring, the authors conducted two sets of experiments using feline ischemic models. Twenty-three adult mongrel cats were divided into two groups: global (n = 9) and focal ischemic (n = 14) groups. In the case of global ischemia, which was induced by hypovolemic hypotension due to blood letting,...

To the Editor: Seerden and co-workers (14) have produced an important study with impressive recordings that show many features of distension-induced electrical and motor activity in the mouse small intestine. Among the highlights of this paper are a clear demonstration of slow wave-driven propulsive contractions, further evidence that the longitudinal and circular muscle layers show the same sl...

BACKGROUND To investigate the relationship between the depression of spinal motor neuronal excitability and the sedative level induced by propofol infusion, we simultaneously analysed the suppressive effect of propofol on the F wave and the sedative level during propofol infusion. METHODS After spinal anaesthesia, sedation was achieved using a propofol target-controlled infusion (TCI) system ...

Halorhodopsin (NpHR), a light-driven microbial chloride pump, enables silencing of neuronal function with superb temporal and spatial resolution. Here, we generated a transgenic line of Drosophila that drives expression of NpHR under control of the Gal4/UAS system. Then, we used it to dissect the functional properties of neural circuits that regulate larval peristalsis, a continuous wave of mus...

We report four children with epilepsy with "continuous spike-waves during slow wave sleep" (CSWSS). The main clinical features were partial motor seizures, mental retardation and motor deficit. The EEG findings were characterized by nearly continuous (> 85%) diffuse slow spike and wave activity in two patients, and localized to one hemisphere in two other cases during non-REM sleep. The treatme...

− This paper presents a set of results regarding the torque of travelling wave ultrasonic motor. It is known the fact that at this type of motor there are a set of phenomena which requires some advanced investigations. The analysis of torque characteristics requires precision measure methods, torquemeters or dinamometers. The torque dependence and influence of specifical parameters are presente...

A new type of motor that utilizes multilayer piezoelectric devices for electromechanical power conversion and mechanism of the strain wave gearing for generation of traveling motive force is proposed in this paper. The construction, basic operation, and torque generation mechanism of the motor are described. The motor can be operated in variable frequency. Experimental results on the prototype ...

To meet the higher accuracy, stiffness and speed demands of positioning systems of machine tools and measuring instruments, two motor concepts are developed with an integrated bearing-driving functionality. For both concepts, piezoelectric technology is used as actuator principle. In the first concept, the limited stroke of piezoactuators is overcome by a travelling-wave principle, which assure...

The over-voltage phenomenon is usually described using the traveling wave and reflection phenomena in variable speed drive system. A voltage pulse, initiated at the inverter, being reflected at the motor terminals due to a mismatch between the surge impedance of the motor and the cable. In this paper, resistance, inductance and capacitance of the cable and the motor windings are obtained experi...

The vertex potential is the largest response that can be recorded in the electroencephalogram of an awake, healthy human. It is elicited by sudden and intense stimuli, and is composed by a negative-positive deflection. The stimulus properties that determine the vertex potential amplitude have been well characterized. Nonetheless, its functional significance remains elusive. The dominant interpr...