I was thinking about audio compression (namely mp3), that "filters" out sound that we would not likely hear - The MP3 lossy audio data compression algorithm takes advantage of a perceptual limitation of human hearing called auditory masking. from: http://en.wikipedia.org/wiki/MP3 I've al...

On Wikipedia, the entire microelectrode page states only the following: A microelectrode is an electrode of very small size, used in electrophysiology for either recording of neural signals or electrical stimulation of nervous tissue. Initially, pulled glass pipette microelectrode was used w...

The most common visualization of an action potential is a graph of the difference in membrane potential (y axis) at a particular time (x axis). According to my textbook Cognitive Psychology by E. Bruce Goldstein, an action potential sent from neuron down the axon remains the same. That is, if we...

I understand How a signal is propagated down the axon. How the membrane potential of a neuron changes during the course of it's "firing". But I don't understand how physically the change in the membrane potential actual starts the signal down the axon. A stimulus causes the voltage gate...