Alan Lloyd Hodgkin (1914-1998) was an English physiologist and biophysicist. With Andrew Huxley, Hodgkin worked on experimental measurements and developed an action potential theory representing one of the earliest applications of a technique of electrophysiology, known as the "voltage clamp". The second critical element of their research was the use of the giant axon of Atlantic squid (Loligo vulgaris), which enabled them to record ionic currents as they would not have been able to do in almost any other neuron, such cells being too small to study using the techniques of the time. In 1963, with Huxley, he won the Nobel Prize in Physiology or Medicine for their work on the basis of nerve "action potentials," the electrical impulses which enable the activity of an organism to be coordinated by a central nervous system. He lived to be 84 and died of natural causes.