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4 votes

Neurons: how does the brain reduce electromagnetic interference?

There is an extensive Q&A about the difference between brain waves and EM waves over on our sister site Psychology & Neuroscience: https://psychology.stackexchange.com/q/15222/14382 (though ...
Bryan Krause's user avatar
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4 votes
Accepted

Why don't we hear ultrasonic sounds as aliased versions of the original signals?

Short answer The cochlea is a tonotopic map with certain physically determined boundaries that determine the range of frequencies perceived. Ultrasonic soundwaves simply do not have a correlate on ...
AliceD's user avatar
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3 votes

Is there one second messenger molecule for each hormone?

There are typically multiple different second messenger systems used by a given hormone, and multiple hormones use the same second messenger system. Second messengers aren't really a property of the ...
Bryan Krause's user avatar
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2 votes

Why don't we hear ultrasonic sounds as aliased versions of the original signals?

I think that you are misquoting Aliasing. Digital acoustics is explained in a mathematical sense, Aliasing is a maths concept. Real life acoustics is explained in a physical sense, which talks about ...
bandybabboon's user avatar
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2 votes
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Are neurons capable of buffering a signal to sync up with other data?

For this answer, I'll use a very broad definition of "buffer" as a mechanism to integrate information at different delays. I have no interest in getting into specific computer science ...
Bryan Krause's user avatar
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1 vote

Neurons: how does the brain reduce electromagnetic interference?

There are two aspects to this question. The first, dealing with EMR associated with AC generated in the usual range is already properly answered. However, in the case of mobile phone radio and wifi ...
jeremiah's user avatar
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1 vote
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The role of PCA (Principal Component Analysis) in recording neurons

Like vkehayas mentions in a comment, they're using it for spike sorting, as you've guessed. This involves both identifying signals from putative neurons (vs noise) and separating different source ...
Bryan Krause's user avatar
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1 vote

Issues obtaining Fo in DIY Imaging Fluorometer

This paper1 gives a definition of all the various parameters. F0 (that's Fzero, not F letter "o" I think) is defined as the dark state fluorescence. There is a second parameter F0' that is ...
bob1's user avatar
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1 vote

Electrocardiogram: Difference between Atrial Fibrillation and Atrial Flutter

A-Flutter will have discernible waves that can be counted, usually. The R-R interval will be regular or maybe slightly irregular if there's a variable conduction block in the AV Node. A-Fib will ...
DFW333's user avatar
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