Measuring Voltage Across the Blood-Brain Barrier: Is the Dermis a Barrier?

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Measuring the voltage used in nerve signal transmission from the brain to a muscle is complex and not directly related to the blood-brain barrier, which primarily regulates molecule access to the brain rather than nerve signal transmission. The dermis, or skin, does not play a role in receiving muscle signals, as these signals terminate directly at the muscle. To measure the voltage difference between the brain and muscle, electrodes can be used. However, detecting nerve signals from outside the body involves various factors and may require insights from biology experts. The discussion has been moved to a biology forum for further exploration.
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Is there a way to measure the amount of voltage used when transmitting from the blood brain barrier to a particular muscle outside of the skin or is the dermis too thick?
 
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thanks in advance for your input.
 
Hmm, I am by no means knowledgeable in matters of biology, but it seems to me you are somewhat confused about at least the terminology, if not the functionality.
The blood-brain barrier has no direct relation to nerve signal transmission. Its function is to essentially be a screen for molecules that have no business being in the brain.
The dermis is just a fancy name for skin. It also has nothing to do with receiving muscle signals; those signals, as should be probably obvious, terminate in the muscle they are supposed to actuate.

Now, if your *actual* question is "how can you measure the voltage difference between the brain origin of the signal, and its terminus in the muscle, the simple answer is: electrodes.

If the question is, can you detect a nerve signal from outside the body, there's a lot of variables involved. Maybe a question better asked in a biology forum.
 
I wish to measure the voltage terminating at the muscle from outside the skin.
 
In contact with the skin, or not?
 
I've moved this to the biology forum from General Physics, as it seems like it may require more assistance from our biology-knowledgeable members.
 
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