The following abstract describes an experimental study to investigate
the nature of the electrical potentials generated by metal amalgam
dental fillings:

"The regeneration of the electromotor force E of the electric piles
formed by two amalgam fillings was measured as a function of time t
after the moment of interruption of the short  contact of their poles.
The measurements were carried out in 30 patients at a mean age of 27.0
+/- 08 years. Automatic recording of the equation E = f (t)
demonstrated that in the first phase of from several to about a score
of seconds the E value rose rapidly, while in the second phase lasting
from several scores to over a thousand seconds the E value approached
asymptotically its initial value Eo."

See:

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2
103035&dopt=Abstract

This study appears to have demonstrated that electrical potentials in
amalgam fillings do not simply disappear in a puff of dentists'
wishful thinking, but are in fact re-generated quite quickly after
being discharged. (A "score" of seconds is twenty. A thousand seconds
is about a quarter of an hour.)

Other studies have demonstrated experimentally that amalgam potentials
measure up to 350 millivolts in magnitude.

See:

http://book.boot.users.btopenworld.com/dutch.htm

And the resting potential of the human neurological synapse is only 70
millivolts.

See:

http://www.smithsrisca.demon.co.uk/memory-glossary.html

The University of Illinois' "Physics Van" website has this to say
about the measurement of electrical activity in the human neurological
system:

"Very sensitive measuring devices which can pick up tiny magnetic
fields can detect neural activity without needing to poke electrodes
directly into neurons, "

See:

http://van.hep.uiuc.edu/van/qa/section/Everything_Else/Humans_and_Animals/200208
12111737.htm

I believe that it should be possible to measure neural activity in the
vicinity of the teeth of individuals both with and without amalgam
fillings and compare the results.

Does anyone disagree?

Keith P Walsh