There he learned how to record cerebral action potentials using amplifiers and cathode-ray tubes.

In 1938 he received his PhD with thesis The Electrical Potentials Recorded in the Brain with Microelectrodes.

The research group included David Lloyd (1911–1985),[11] Rafael Lorente de Nó, and Harry Grundfest.

[13] Late on the night of September 23, 1938, Professor Raemer Rex Renshaw and his second wife died after falling nineteen stories from their Tudor City apartment at 45 Prospect Place in Manhattan.

The younger of her two brothers was Samuel Perkins Hayes Jr. (1910–2002),[15] who was a social psychologist, a consultant to the Peace Corps from 1961 to 1969, and president of the Foreign Policy Association until 1975.