Margaret Kennard

Margaret Alice Kennard (September 25, 1899—December 12, 1975) was a neurologist who principally studied the effects of neurological damage on primates. Her work led to the creation of the Kennard Principle, which posits a negative linear relationship between age of brain lesion and outcome expectancy.

Schooling and studies
She earned a Rockefeller Traveling Fellowship for study in Western Europe from 1934 to 1936. She also studied the effects of stimulants and cortical depressants on monkeys with brain damage.

Kennard Principle
The observation that young brains reorganize more effectively than adult brains was first articulated by Kennard in 1936. Consequently, the notion that how well a brain can reorganize itself after damage as a function of the developmental stage is now known as the "Kennard principle". This research led to one of the earliest experimental evidence for age effects on neuroplasticity.

She worked closely with John Fulton in her famous infant brain studies.