Scientific principle · reviewed
Bioelectricity
From the 1780sLiving nerves and muscles generate and respond to electrical signals.
Galvani's frog experiments in the 1780s helped establish electrophysiology. Later work showed that cardiac activity could be detected at the body surface and recorded instrumentally. Electrical activity arises as charged ions move across cell membranes. In nerves it carries information; in muscles it helps trigger contraction. Detecting these small voltages at the body surface made the nervous system and heart accessible to measurement without surgery.
Sources
- Technologies to Interface with the Brain for Recording and Modulation — National Academy of Engineering, 2017
Direct relationships
- Electromagnetism→BioelectricityConnected physical electricity with measurable physiological signals · medium confidence
- Bioelectricity→ElectrocardiographyEstablished cardiac electrical activity as a measurable signal · high confidence
- Clinical thermoscope→BioelectricityEstablished a lineage of instrumented physiological measurement · low confidence