Different areas of brain

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Offline anirban

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Different areas of brain
« on: February 26, 2013, 05:32:13 PM »
The cerebral cortex of the brain can be further classified into different brain regions. German anatomist Korbinian Brodmann defined and numbered 52 different regions of the cerebral cortex based on the cytoarchitectural organization of its neurons. These 52 areas are known as Brodmann areas of brain.

In 1861, a French neurosurgeon Paul Broca identified for the first time, the existence of a “language centre” in the posterior portion of the frontal lobe of left hemisphere. Now this area is known as Broca’s area. This was in fact the first area of the brain to be associated with a specific function—in this case, language.

Ten years later, a German neurologist Carl Wernicke, discovered another part of the brain in the posterior portion of the left temporal lobe. This one known as Wernicke's area involved in understanding language. People who had a lesion at this location could speak, but their speech was often incoherent and made no sense.

Neuroscientists now agree in the left hemisphere of the brain, there is a sort of neural loop that is involved both in understanding and in producing spoken language. At the frontal end of this loop lies Broca's area, which is usually associated with the production of language, or language outputs. At the other end (more specifically, in the superior posterior temporal lobe), lies Wernicke's area, which is associated with the processing of words that we hear being spoken, or language inputs. Broca's area and Wernicke's area are connected by a large bundle of nerve fibers called the arcuate fasciculus.

Brodmann area 44 “Pars opercularis” and area 45 “pars triangularis” are parts of Broca's area. Brodmann area 22 “Superior temporal gyrus” is usually considered to contain the Wernicke's area. Brodmann area 39 “Angular gyrus” and area 40 “Supramarginal gyrus” are considered by some to be part of Wernicke's area.

Fig 1: Lateral surface of the brain with Brodmann's areas numbered
Fig 2: Medial surface of the brain with Brodmann's areas numbered
Fig 3: The Broca's and Wernicke's area of Brain.
Shikha Anirban
Assistant Professor
Dept. of SWE, FSIT
Daffodil International University

Offline Saba Fatema

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Re: Different areas of brain
« Reply #1 on: May 06, 2013, 06:31:00 PM »
The figures are not visible.
Saba Fatema
Senior Lecturer
Department of GED