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In this one-hour lecture from The Royal Institution's 1975 Christmas Lectures series, Professor Heinz Wolff explores the fascinating world of bioelectricity and how our bodies conduct electricity. Discover how muscle and nerve cells produce electrical signals that can be detected outside the body, and learn about extreme examples like electric fish that can generate enough voltage to stun prey. Understand the challenges of measuring these electrical signals through skin and tissue, comparing it to detecting specific sounds at a noisy party. Explore how organs like the heart produce organized electrical patterns that can be detected almost anywhere on the body, while brain signals present more complex patterns. Part of the "Signals from the Interior" series investigating the body's internal workings without breaking the skin, this lecture combines scientific explanation with engaging demonstrations to illuminate how electrical signals from our tissues provide valuable diagnostic information.
