[1] Helen Easdale Dimsdale was born on 2 July 1907 at Stretford, Lancashire, England, the daughter of John Harold Brown and his wife Ellen Carseto.
Helen was first educated at Culcheth Hall and Hayes Court before moving on to attend Girton College, Cambridge where she took a first in the Natural Science Tripos in 1929.
Dimsdale continued to work at Maida Vale and the Royal Free until ill-health forced her retirement in 1967.
She served as an "examiner in neurology for the Diploma of Psychological Medicine at Durham University and for the Royal College of Physicians in medical ophthalmology.
Dimsdale proved her administrative abilities when she served as chairman of the planning committee for the new Royal Free Hospital in the 1950s and as treasurer for the Association of British Neurologists (1961–1966).