Nerve excitation by high-frequency alternating current1

On the Relation of the Strength-frequency Curve in Excitation by Alternating Current to the Strength-duration and Latent Addition Curves of the Nerve Fiber

1. Determinations were done of the strength-duration, the strength-frequency, and the latent addition curves with single fiber preparations. 2. Calculation of the strength-duration and strength-frequency curves from the latent addition data by the Blair-Monnier-Hill-Rashevsky theory yielded results which showed a considerable divergence from the actual data. Calculation by the method of integra...

Particle Separation Using High Frequency Alternating External Fields

We present results for a model that describes particle penetration through a medium. The particle motion is subjected to an alternating external field (bias). We employ theoretical considerations and computer simulations. A random walk model is utilized with an alternating bias factor in the probabilities of jumps, which selectively changes the mode of motion from a pure random walk to a regula...

Alternating-laser excitation of single molecules.

Single-molecule fluorescence spectroscopy addresses biological mechanisms and enables ultrasensitive diagnostics. We describe a new family of single-molecule fluorescence methods that uses alternating-laser excitation (ALEX) of diffusing or immobilized biomolecules to study their structure, interactions, and dynamics. This is accomplished using ratios that report on the distance between and the...

Electric Excitation of Nerve

Does High Frequency Transcutaneous Electrical Nerve Stimulation (TENS) Affect EEG Gamma Band Activity?

Background: Transcutaneous electrical nerve stimulation (TENS) is a noninvasive, inexpensive and safe analgesic technique used for relieving acute and chronic pain. However, despite all these advantages, there has been very little research into the therapeutic effects of TENS on brain activity. To the best of our knowledge, there is no evidence on the effect of high frequency TENS on the gamma ...