Nobel Prizes and Laureates

Nobel Prizes and Laureates

The Nobel Prize in Physiology or Medicine 1967
Ragnar Granit, Keffer Hartline, George Wald

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Keffer Hartline - Facts

Haldan Keffer Hartline

Haldan Keffer Hartline

Born: 22 December 1903, Bloomsburg, PA, USA

Died: 17 March 1983, Fallston, MD, USA

Affiliation at the time of the award: Rockefeller University, New York, NY, USA

Prize motivation: "for their discoveries concerning the primary physiological and chemical visual processes in the eye"

Field: ocular physiology

Prize share: 1/3


Our vision functions because light from the surrounding world is captured by many light-sensitive cells in the retina at the back of the eye. A series of reconnections and transformations of chemical and electrical signals finally result in visual impressions. In studies of the horseshoe crab around 1950, Keffer Hartline analyzed how the primary signals from visual cells are processed in a network of nerve cells. Among other things, he showed that when a cell is stimulated, signals from surrounding cells are suppressed. This makes it easier to understand the concept of contrasts.

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