Following this original observation, Galvani made a great many

experiments on the effect of electric stimulus upon the nerves
of frogs and other animals
Following this original observation, Galvani made a great many
experiments on the effect of electric stimulus upon the nerves
of frogs and other animals. He found that the twitching of the
frog"s muscles could be produced by atmospheric electricity,
both at the time of lightning and at other times when no
lightning was visible. During these investigations he observed
that when the legs of the frog were suspended from an iron
railing by a hook through the spinal cord, and when this hook
was of some other metal than iron, the muscles would twitch
whenever the feet touched the iron railing. He tried out a
number of pairs of metals, and found that when the nerve was
touched by one metal and the muscle or another point on the
nerve was touched by another metal and the two metals were then
brought into contact or were connected through another metal or
through the human body, the muscles would contract as they
would when stimulated by electricity.


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