Stimulus Artifact
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Eliminação de artefatos de estímulo em potenciais evocados somatossensitivos. / Removal of stimulus artifact in somatosensory evoked potentials.
Os potenciais evocados têm uma consagrada utilização em clínica. Sua obtenção é dificultada pela presença de outros sinais biológicos, de artefatos de movimento, de ruído eletrônico, de interferência da rede elétrica e de artefatos de estímulo. A média síncrona ou promediação é um método que elimina os sinais que não estejam sincronizado
Publicado em: 2010
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2. The learning curve: Implications of a quantitative analysis
The negatively accelerated, gradually increasing learning curve is an artifact of group averaging in several commonly used basic learning paradigms (pigeon autoshaping, delay- and trace-eye-blink conditioning in the rabbit and rat, autoshaped hopper entry in the rat, plus maze performance in the rat, and water maze performance in the mouse). The learning cur
National Academy of Sciences.
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3. Uniqueness and Stability of Action Potential Models during Rest, Pacing, and Conduction Using Problem-Solving Environment
Development and application of physiologically detailed dynamic models of the action potential (AP) and Ca2+ cycling in cardiac cells is a rapidly growing aspect of computational cardiac electrophysiology. Given the large scale of the nonlinear system involved, questions were recently raised regarding reproducibility, numerical stability, and uniqueness of m
The Biophysical Society.
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4. Birefringence signal and early mechanical changes at normal and increased tonicities in frog skeletal muscle.
Simultaneous measurements of the time course of early mechanical events and the early large birefringence signal were performed during activation of isolated frog skeletal muscle fibres bathed in iso- and hypertonic media. A piezo-electric transducer was used which had a resonance frequency of 3.3 kHz and a sensitivity of 740 mV/mN (0.5 mV noise peak to peak
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5. Brief occurrence of a population of presynaptic intramembrane particles coincides with transmission of a nerve impulse.
Small pieces of Torpedo electric organ were cryofixed at 1-ms time intervals in a liquid medium at -190 degrees C before, during, and after the passage of a single nerve impulse. In contrast to studies using this or other preparations, these experiments were done without 4-aminopyridine or other drugs that potentiate transmitter release. Freeze-fracture repl