New answers tagged neurophysiology
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Short answer
Outer hair cells physically contract at a rate corresponding to the characteristic resonant frequency at which they are situated on the basilar membrane, thereby mechanically amplifying the basilar membrane movement.
Background
After the exchange of thoughts in the comments I started to understand your question is basically what the mechanism is ...
2
The wide, slack composition of the basilar membrane (BM) in the apex and the narrow, stiff characteristics at the base are among the factors that underlie the tuning of the BM. Slack, wide structures vibrate at low harmonic frequencies, stiff and narrow structures at high frequencies, just like the strings of a guitar. The apex of the cochlea transduces low ...
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Short answer
Biphasic pulses are often used to electrically stimulate nerve tissue because of safety considerations, because they are charge balanced.
Background
Monophasic pulses are generally more effective than biphasic ones to stimulate nerve tissue. Yet, monophasic pulses lead to a build up of charge that can eventually lead to tissue damage, e.g., to ...
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I think this is just a question of causality. Most cognitive neuroscience has traditionally been correlational. Using your example, when gamma power is higher, sensory perception is increased. But does gamma power cause higher sensory perception? That's what the researchers have really always wanted to know, but only now have methods like transcranial ...
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