• Most biomedical recordings occur on the surface of the body
• How does microscopic cellular electrical activity conduct to the
body’s surface for gross, external measurement?
• Volume conductor electric field
• model for link (mapping) between
• microscopic electrical activity generated within the bioelectric source
• macroscopic potential distribution produced at the surface of the body
• describes flow of action current through the conducting medium
• conducting medium = infinite (relative to source) volume conductor
• two components of the model
• bioelectric source – modeled as a constant current source.
• conducting medium – modeled as an electrical load.
• lends to insight into the interpretation
of recorded waveforms