Before Flourens began his animal experiments, Gall had developed relatively new ideas of brain function [3], which proved important: ‘that the cerebral cortex represented the highest level of the brain and that the development of this area characterised mammals and man. ‘
What is Flourens theory of equipotentiality?
In neuropsychology, equipotentiality is a neurological principle that describes a cortical mechanism, first identified by Jean Pierre Flourens and later revisited by Karl Lashley in the 1950s. His principle of “mass action” stated that the cerebral cortex acts as one—as a whole—in many types of learning.
What is Pierre Flourens known for?
Marie Jean Pierre Flourens was a French physician, famous for various significant discoveries relating to the nervous system, cerebral localisation and brain functions. He was known for his studies on brain physiology. He was one of the pioneers in the usage of experimental methods in neuroanatomy.
What was Marie Jean Pierre flourens primary research goal?
Under his sponsorship, Flourens conducted a series of experiments (1814–22) to determine physiological changes in pigeons after removal of certain portions of their brains.
What was Gall known for?
Franz Joseph Gall (1758–1828) is best remembered for his belief that bumps on the skull reflect the growth of small, underlying brain areas, though among some historians, more positively for introducing the concept of cortical localization of function.
How did Gall make his discoveries?
While developing his theories on localization of function, Gall significantly advanced the science of dissection. Instead of slicing randomly, as had been the practice in previous years, Gall’s method involved slow exploration of the entire brain structure and the separation of individual fibers.
What did Gustav Fritsch and Eduard Hitzig discover?
In 1870, Eduard Hitzig and Gustav Fritsch performed experiments on dogs by which they were able to produce movement through electrical stimulation of specific parts of the cerebral cortex. The unpredictable outcome of this interest was the discovery of the electrical excitability of the cortex.
What is Equipotentially?
adj. 1. Having equal potential. 2. Physics Having the same electric or gravitational potential at every point.
Who discovered experimental ablation?
Marie Jean Pierre Flourens
It was pioneered in 1824 by the French physiologist Marie Jean Pierre Flourens (1794–1867) and is also called a lesion experiment.
What is localization psychology?
The theory of localization refers to the idea that different parts of the brain are responsible for specific behaviors, or that certain functions are localized to certain areas in the brain.
What method did Pierre flourens use to investigate cortical Localisation?
ablation
To test Gall’s assertions, Flourens developed ablation as a procedure to explore the workings of the brain. By removing anatomically defined areas of the brain of an animal and watching its behaviour, he thought he might localize certain functions.
What did Paul Broca contribution to psychology?
Paul Broca. He is best known for his research on Broca’s area, a region of the frontal lobe that has been named after him. Broca’s area is involved with language. His work revealed that the brains of patients suffering from aphasia contained lesions in a particular part of the cortex, in the left frontal region.
What is Broca’s area?
After his death, Broca discovered that Tan’s brain had a relatively small zone destroyed by neurosyphillis, which was delimited to one side of the anterior brain hemispheres (cortex). This part of the brain later became known as Broca’s area, and it is responsible for the control of speech (motor expression of the language).
Why should we re-inspect Broca’s original patients?
Given the historical significance of Broca’s original patients and the increasing reliance on Broca’s area as a major speech centre, we thought it important to re-inspect these brains to determine the precise location of their lesions as well as other possible areas of damage.
What did Broca contribute to the Society Anatomique?
Like Cruveilhier and Charcot, Broca made regular Society Anatomique presentations on musculoskeletal disorders. He demonstrated that rickets, a disorder that results in weak or soft bones in children, was caused by an interference with ossification due to disruption of nutrition.
