the corpus callosum is a region of white matter that
Corpus callosum The corpus callosum (/ˈkɔːrpəs kəˈloʊsəm/; Latin for "tough body"), also callosal commissure, is a wide commissure, a flat bundle of commissural fibers, about 10 cm long[citation needed] beneath the cerebral cortex in the brains of placental mammals. It spans part of the longitudinal fissure, connects the left and right cerebral hemispheres, and enables communication between the hemispheres. It is the largest white matter structure in the human brain, consisting of 200–250 million axonal projections.[1]
Wernicke's area Wernicke's area (/ˈvɛərnɪkə/ or /ˈvɛərnɪki/; German: [ˈvɛʁnɪkə]), also called Wernicke's speech area, is one of the two parts of the cerebral cortex that are linked to speech (the other is Broca's area). It is involved in the comprehension or understanding of written and spoken language (in contrast to Broca's area that is involved in the production of language). It is traditionally thought to be in Brodmann area 22, which is located in the posterior section of the superior temporal gyrus (STG) in the dominant cerebral hemisphere[citation needed] (which is the left hemisphere in about 95% of right handed individuals and 60% of left handed individuals). Damage caused to Wernicke's area results in receptive, fluent aphasia. This means that the person with aphasia will be able to fluently connect words, but the phrases will lack meaning. This is unlike non-fluent aphasia, in which the person will use meaningful words, but in a non-fluent, telegraphic manner.[1]