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lennon
Participant

Join Date: Oct 2010
Posts: 1

Skin Potential

10/31/2010 4:43 PM

Hello, I'm currently looking into skin potentials and healing as a undergraduate project. So far I have come across the concept of the skin battery (negative charge on the outside positive charge on the inside ie sub dermal) My question is, without abrading the skin would a potential reading occur? ie do we have `skin surface electrical activity'.A normal skin battery range can range from 0 to -60mV. If I were just to measure the surface activity at two points would I find a reading of -60mV , or is it only related to a comparison of outer and inner states rather than a seperate outer potential. I must admit my biology knowledge is at a fairly low level (although as I'm investigating this area I am trying to improve it via reading round the subject) an hope I haven't wasted anyones time with this being a nonsense question.
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lyn
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Join Date: Oct 2008
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#1

Re: Skin Potential

10/31/2010 6:22 PM

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Anonymous Poster
#2

Re: Skin Potential

11/01/2010 8:27 AM

We published an interesting article, along with the circuitry, to measure anziety in a manner like a lie detector.

See Caprara et al. J Endodontics 2003;28:493-6.
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bsvr
Member

Join Date: Dec 2008
Posts: 7
#4
In reply to #2

Re: Skin Potential

11/01/2010 8:32 AM

Could you please give the link or URL to the paper?

YS,
JNB.
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bsvr
Member

Join Date: Dec 2008
Posts: 7
#3

Re: Skin Potential

11/01/2010 8:31 AM

Are you sure that the voltage is generated by the skin?

I am of the view that the voltage is coming out of the electrochemical voltage/potential difference between the two electrodes that you are using.

To eliminate such a possibility, use two dissimilar materials like copper for one and zinc for another and see if the voltage increases. (Other combinations could be copper & aluminum, or iron & copper.) Then reverse the probes and find the voltage. If the difference between the two readings is equal to the reading with similar electrodes, then it could be the potential generated by the skin.

I am really interested. Please keep us informed.
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crimich13
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Join Date: Mar 2009
Location: Manchester NH
Posts: 118
Good Answers: 5
#5

Re: Skin Potential

11/01/2010 10:14 PM

Sounds potentially abrasive. Or exciting depending on your unique perspective.
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drbobwoolery
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Hobbies - CNC - New Member

Join Date: Feb 2010
Location: Vallejo, CA
Posts: 127
Good Answers: 8
#6

Re: Skin Potential

11/01/2010 10:50 PM

Look up a review article in the Annals (or possibly proceedings) of the New York Academy of Science in 1961 by Ravitz. He summarizes work back into the 1930's, much by Harold Saxon Burr. Silver-silver chloride electrodes and normal saline bridges to skin contact get around the dissimilar metals issue. Another source on this issue is Robert O. Becker, whose popular book _the Body Electric_ is the best study of the horrors of politics interacting with science.
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