15 out. Breve História da Neurociência Cognitiva INTRODUÇÃO HISTÓRIA DO HISTÓRIA DA PSICOLOGIA Empirismo: conhecimento através de. age (estimated from 9 to 11 yrs) the right hemisphere would take Ongudge function, for the cerebral hemispheres were equipotencial in the young child. Free Online Library: Las funciones psiquicas superiores, la corteza cerebral y la como la idea de la homogeneidad y la equipotencialidad del tejido cerebral.

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After obtaining his Bachelor of Arts at West Virginia University, he was awarded a teaching fellowship at the University of Pittsburghwhere he taught biology along with biological laboratories. He also argued that elementary sensory input was localized, which is supported by current research.

Today we know that distribution of engrams does in fact exist, but that the distribution is not equal across all cortical areas, as Lashley assumed. He enrolled at West Virginia Universitywhere he had originally intended to become an English major. Retrieved from ” https: However, food avoidance experiments have questioned its application.

When speaking of this professor, Lashley wrote, “Within a few weeks in his class I knew that I had found my life’s work”. Fox Robert J. He trained rats to perform specific tasks seeking a food reward equippotencialidad, then lesioned specific areas of the rats’ cortex, either before or after the animals received the training.

In the s brain localization theories were the popular theories on how the brain functioned.

Karl Lashley – Wikipedia

Hull Edward C. A fellow researcher, Shepherd Ivory Franzalso shared the common interest of studying localization and studying only things that could be observed. While working on his PhD in genetics, Lashley began a number of tests on brain tissue and the idea of localization.


John Black Johnston, a professor at West Virginia University named, taught the first zoology course that Lashley took.

Fellows of the Royal Society elected in He was diagnosed with hemolytic anemia and put on a cortisone treatment. From Wikipedia, the free encyclopedia.

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This led Lashley to conclude that memories are not localized, but that they are widely distributed across the cortex. National Academy of Sciences.

Karl Spencer Lashley Award, An introduction to the history of psychology. Retrieved 15 Cerebrao Karl Lashley worked with Donald Hebb in The Yerkes Laboratories; a lab that worked with monkeys to study various psychological concepts. Lashley argued that one would then be able to locate these connections in part of the brain and he systematically looked for where learning was localized.

Karl Lashley

The law of mass action says that the efficiency of any complex function of the brain is reduced proportionately to how much damage the brain as a whole has sustained, but not to the damage of any particular area of the brain.

Robert Richardson Sears J.

Lashley was a very active boy, both physically and mentally. By using this site, you agree to the Terms of Use and Privacy Policy. The reasons for his lack of friendships is unclear. Woodworth John Cerwbral. By using this site, you agree to the Terms of Use and Privacy Policy. He did not have many friends. Stanley Hall I.


Ghiselli and Brown did an experiment where they destroyed various subcortical regions of the brain in rats and tested their abilities to learn mazes compared to rats with no damage done to their brains. He led Lashley to understand what he wanted to do the rest of his life.

He was the only child of Charles and Maggie Lashley. The first was his mother Maggie Blanche Spencer. It proposes that all forms of associative learningboth classical Pavlovian and operant Skinnerian involve the same underlying mechanisms. His favorite thing to do as a child was to wander through the woods and collect animals, like butterflies and mice. He grew up in a middle-class family with a reasonably comfortable life. This is no doubt what gave Lashley his love of learning.


Lashley offered two generalizations from his research, that recently have been successfully challenged but nonetheless represent important milestones in the development of neurological theory:. In neuropsychologyequipotentiality is a neurological principle that describes a cortical mechanism, first identified by Jean Pierre Flourens and later revisited by Karl Lashley in the s.

McKeachie Theodore H. McVicker Hunt Laurance F. Through Lashley’s ideas of equipotentiality and the law of mass action, he is saying that the brain is functioning as a whole unit and that over all damage to the brain effects it’s over all functioning. He reached this erroneous conclusion due to imperfect lesioning methods. If cortical tissue is destroyed following the learning of a complex task, deterioration of performance on the task is determined more by the amount of tissue destroyed than by its location.

Since the area of the brain that was originally performing this function is damaged and unusable, the brain compensates and can code that information in other parts of the brain. In Februarywhile doing his teaching at Harvard, Lashley unexpectedly collapsed and was hospitalized.

From Wikipedia, the free encyclopedia. However, equipotentiality and the law of mass action don’t mean that there is no localization.