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Thomas Young and Hermann von Helmholtz, gave to the trichromatic theory of color vision. The theory began when Thomas Young proposed that color vision results from the actions of three different receptors. Young suggested that the eye contained different photoreceptor cells that were sensitive to different wavelengths of light in the visible spectrum.
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The United States obtains the territory of ‘Louisiana’ from France.
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Johann Chritian Reil uses alcohol to harden the brain.
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The Natives Americans fought agaisnt the U.S. expansion to keep their lands.
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Alabama becomes the 22nd state in the United States.
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Charles Bell, a Scottish surgeon, demonstrated that spinal nerves carry both sensory and motor functions and that sensory fibers traverse the posterior roots whereas the motor fibers run through the anterior, this shows that the cranial nerve V was sensory to the face and motor to mastication whereas cranial nerve VII controlled muscles of expression.
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Marie-Jean-Pierre Flourens states that cerebellum regulates motor activities.
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John P. Harrison firstargues agaisnt phrenology, the detailed study of the shape and size of the cranium as a supposed indication of character and mental abilities.
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Maachusetts establishes a “State Lunatic Hospital” for the mentally ill.
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Gabriel Gustav Valentin indentifies neuron’s necleus and nucleolus with the help of a microscope.
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The American Physiological Society is founded.
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The removal of thousands of native american people in which just as many died in the tormenting travel to their new land. It was a horrifying act which is still mpurned today for all the lives that were lost. [http://www.pbs.org/wned/war-of-1812/essays/native-nations-perspective/]
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Eduard Zeis publishes study about dreams in people who are blind.
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Adolph Hannover uses chromic acid to harden nervous tissue.
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Baillarger was the first physician to discover that the cerebral cortex was divided into six layers of alternate white and grey laminae. His name is associated with the inner and outer bands of Baillarger, which are two layers of white fibers of the cerebral cortex.
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Dorothea Lynde Dix investigates brutality within mental hospitals in the United States.
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Benedikt Stilling is first to study spinal cord in serial sections.
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Robert Remark provides first illustration of 6-illustration cortex.
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Ernst Heinrich Weber and Edward Weber discover that stimulation of the vagus, the tenth pair of cranial nerves, inhibits the heart
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American Medical Association is founded.
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Phineas Gage has his brain pierced by an iron rod.
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Marchese Alfonso Corti describes the cochlear receptor organ in the inner ear (organ of Corti).
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Joseph von Gerlach stains brain tissue with a carmine solution.
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Hermann Snellen invents the eyechart with letters to test vision.
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John Hughlings Jackson writes on loss of speech after brain injury.
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Theodore Meynert performs histologic analysis of cerebral cortex.
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Silas Weir Mitchell provides a clinical description of phantom limb pain
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Richard Caton is first to record electrical activity from the brain.
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Scottish surgeon William Macewen performs successful surgery to treat a brain abscess.
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The Journal of the American Medical Association is founded.
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English surgeon Richman John Godlee performs surgery to remove a brain tumor.
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Karl Koller discovers anesthetic properties of cocaine by testing it on his own eye.
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Adolf Eugen Fick makes the first contact lens out of glass for vision correction.
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Margaret Floy Washburn is the first woman to receive a Ph.D. (Cornell University) in psychology.
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John Jacob Abel isolates adrenalin.
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Bayer Drug Company markets heroin as nonaddicting cough medicine.
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Physiologist Ida Hyde is the woman elected to the American Physiological Society.
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Austrain ophthalmologist Eduard Zinn oerforms rhe first successful human corneal transplant.
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World War I begins and ends.
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Shinobu Ishihara publishes a set of plates to test color vision.
