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

[thisguy]

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?

 

[thisguy]

thanks in advance for your input.

 

[rumborak]

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.

 

[thisguy]

I wish to measure the voltage terminating at the muscle from outside the skin.

 

[rumborak]

In contact with the skin, or not?

 

[Drakkith]

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.