نتایج جستجو برای: electrically evoked compound action potential
تعداد نتایج: 1733989 فیلتر نتایج به سال:
The study investigated the time course of the effects of acoustic and electric stimulation on the electrically evoked compound action potential (ECAP). Adult guinea pigs were used in acute experimental sessions. Bursts of acoustic noise and high-rate (5000 pulses/s) electric pulse trains were used as maskers. Biphasic electric pulses were used as probes. ECAPs were recorded from the auditory ne...
The action of ketamine upon spontaneously active and electrically driven Purkinje fibres of the moderator band of the pig heart has been studied using a floating microelectrode technique. Ketamine hydrochloride altered the transmembrane potential in a dose-related and reversible manner. Concentrations of 1X 10M were subthreshold whereas 5 X 10'M and 1X 10~M slowed the frequency and increased th...
The action of ketamine upon spontaneously active and electrically driven Purkinje fibres of the moderator band of the pig heart has been studied using a floating microelectrode technique. Ketamine hydrochloride altered the transmembrane potential in a dose-related and reversible manner. Concentrations of 1X 10M were subthreshold whereas 5 X 10'M and 1X 10~M slowed the frequency and increased th...
The effect of atracurium or vecuronium on the depolarization phase of the evoked compound action potential of the adductor pollicis has been investigated in 30 adult patients. Patients were studied using single supramaximal stimulation of the ulnar nerve at the wrist. The evoked compound action potential was measured over the adductor pollicis muscle. When blockade by atracurium exceeded 80%, a...
Abstract Introduction : Despite its central role in medicine electrical stimulation (ES) is still limited by selectivity. Different reports did assess effects of different waveforms, intensities, and frequency on the activation threshold nerve fibres with diameters. We aimed to extend this knowledge investigating effect short monophasic rectangular pulses (1, 2, 5, 10, 50, 100 200 μs) recruitme...
BACKGROUND Modern cochlear implants have integrated recording systems for measuring electrically evoked compound action potentials of the auditory nerve. The characterization of such recording systems is important for establishing a reliable basis for the interpretation of signals acquired in vivo. In this study we investigated the characteristics of the recording system integrated into the MED...
We reviewed the results of motor evoked potential (MEP) and somatosensory evoked potential (SEP) monitoring during 116 operations on the spine or spinal cord. We monitored MEPs by electrically stimulating the spinal cord and recording compound muscle action potentials from lower extremity muscles and monitored SEPs by stimulating posterior tibial or peroneal nerves and recording both cortical a...
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