Gertrude Falk completed a PhD at Rochester on diuresis in the rat and worked as a postdoctoral researcher with Gerrard in Chicago, studying a wide range of muscle types. She came on a Guggenheim Fellowship to the UCL Biophysics Department in 1961 from the University of Washington. An early microelectrode physiologist, she and Paul Fatt first studied muscle before turning their techniques to electrical studies of rod outer segments. Their work on synapses and retinal function generated a theoretical paper in 1974. Other publications followed, including a clutch of Nature papers with Jonathan Ashmore. Further discoveries about retinal physiology came later from her research with Richard Shiells.

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