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The lateralization of brain function (or hemispheric dominance [1] [2] / lateralization [3] [4]) is the tendency for some neural functions or cognitive processes to be specialized to one side of the brain or the other.
Subject 1 with a lesion in the "A" region of the brain may show impaired functioning in cognitive ability "X" but not "Y", while subject 2 with a lesion in area "B" demonstrates reduced "Y" ability but "X" is unaffected; results like these allow inferences to be made about brain specialization and localization, also known as using a double ...
Franz Joseph Gall or Franz Josef Gall (German:; 9 March 1758 – 22 August 1828) was a German neuroanatomist, physiologist, and pioneer in the study of the localization of mental functions in the brain. Claimed as the founder of the pseudoscience of phrenology, [1] Gall was an early and important researcher in his fields.
In the mid-19th century scientists first began to make discoveries regarding lateralization of the brain, or differences in anatomy and corresponding function between the brain's two hemispheres. Franz Gall, a German anatomist, was the first to describe what is now known as the Doctrine of Cerebral Localization. Gall believed that, rather than ...
Localization theories can be dated as far back as Aristotle, but the man credited with the beginning concepts of field theory was Jean Pierre Flourens. [citation needed] Field theory is the concept that the brain acts as a single functional unit.
This was the first anatomical proof of localization of brain function. Broca's work contributed to the development of physical anthropology, advancing the science of anthropometry, [5] and craniometry, in particular, the now-discredited practice of determining intelligence.
Lesion network mapping is a neuroimaging technique that analyzes the connectivity pattern of brain lesions to identify neuroanatomic correlates of symptoms. [1] [2] [3] The technique was developed by Michael D. Fox and Aaron Boes to understand the network anatomy of lesion induced neurologic and psychiatric symptoms that can not be explained by focal anatomic localization.
In the 1800s brain localization theories were the popular theories on how the brain functioned. [1] The Broca's area of speech was discovered in 1861, in 1870 the cerebral cortex was marked as the motor center of the brain, and the general visual and auditory areas were defined in the cerebral cortex. [3]