In 1952, the British physiologists Alan Hodgkin and Andrew Huxley published their quantitative model of the nerve action potential at the Physiological Laboratory in Cambridge, England. Their work, extending Galvani's eighteenth-century insights into bioelectricity, demonstrated that nerve impulses are electrical signals produced by the movement of sodium and potassium ions across the nerve cell membrane. This mathematical model of electrical signaling in living organisms, developed in Cambridge, earned them the 1963 Nobel Prize and remains the foundation of modern neuroscience.

Hodgkin and Huxley's demonstration that thought itself is an electrical phenomenon, the movement of ions through channels in nerve cells, provided a stunning scientific basis for the ancient metaphor of the "electric" quality of inspiration, passion, and mental energy. This discovery, linking back to Galvani's original bioelectricity research, gave contemporary poets a scientifically grounded vocabulary for describing the electrical nature of consciousness. Poets from Sylvia Plath to Seamus Heaney have used neurological and electrical imagery to explore the relationship between body, mind, and creative impulse.