Galvanism

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"Galvanism" Electrodes touch a frog, and the legs twitch into the upward position[1]
Cartoon of a galvanised corpse

In biology, galvanism is the contraction of a muscle that is stimulated by an electric current. In physics and chemistry, it is the induction of electrical current from a chemical reaction, typically between two chemicals with differing electronegativities.

History[edit]

The effect was named after the scientist Luigi Galvani, who investigated the effect of electricity on dissected animals in the 1780s and 1790s. When Galvani was doing some dissection work in his lab, his scalpel touched the body of a frog, and he saw the muscles in the frog's leg twitch. Galvani referred to the phenomenon as animal electricity, believing that he had discovered a distinct form of electricity.

Modern studies[edit]

The modern study of galvanic effects in biology is called electrophysiology, the term galvanism being used only in historical contexts. The term is also used to describe the bringing to life of organisms using electricity, as popularly associated with, but only explicitly stated in the 1831 revised edition of, Mary Shelley's work Frankenstein, and people still speak of being 'galvanized into action'.

See also[edit]

References[edit]

  1. ^ David Ames Wells, The science of common things: a familiar explanation of the first principles of physical science. For schools, families, and young students., Publisher Ivison, Phinney, Blakeman, 1859, 323 pages (page 290)

External links[edit]