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J Appl Physiol 20: 349-350, 1965;
8750-7587/65 $5.00
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A photopotentiometric transducer for detecting in vitro muscle contractions

Max McIntosh 1, Dennis E. Duggan 1, Dean D. Watt 1, and Louis H. Goodson 1

1 Midwest Research Institute, Kansas City, Missouri

In vitro muscle contractions can be detected and recorded by using a light-sensitive solid-state potentiometer as a transducer. The amount of light reaching the photosensitive potentiometer is controlled by movement of a shield across the potentiometer in response to muscular contractions. The apparatus is relatively frictionless, sensitive, inexpensive, and needs little or no amplification when the signal is transmitted to ordinary recorders.

photosensitive solid-state potentiometer; frictionless transducer; Schultz-Dale reaction; hypersensitivity; anaphylaxis

Submitted on August 10, 1964






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