Language and the Brain
Language is processed by SPECIFIC BRAIN REGIONS — mostly in the LEFT hemisphere for ~95% of right-handed people. Two especially important areas: BROCA'S AREA (frontal lobe) handles speech production. WERNICKE'S AREA (temporal lobe) handles speech comprehension. Damage to these (often from strokes) causes APHASIAS — language disorders that reveal how the brain organizes language.
Two famous aphasias. BROCA'S APHASIA: damage to Broca's area. Patients understand language but speak in halting, telegraphic phrases — content words preserved, grammar damaged. ("Walk dog. Today walk dog.") WERNICKE'S APHASIA: damage to Wernicke's area. Patients speak fluently but their speech makes little sense — words and sentences flow but mean nothing. They often do not realize they are unintelligible. The dissociation reveals that production and comprehension are partially separate systems.
A stroke patient speaks fluently but words do not connect into meaningful sentences. They seem unaware. This is most likely:
Modern findings. Brain imaging (fMRI, MEG) shows language uses MANY brain regions, not just two. The "language network" includes Broca, Wernicke, and many connecting areas. Different aspects (sound, syntax, meaning, pragmatics) recruit different patterns. Sign languages use the same brain regions as spoken languages — proving the regions handle LANGUAGE, not just speech specifically. Bilinguals show partly different patterns for different languages.
Right or Left
Try this: tap your fingers while reading. Most right-handers find it harder to tap with the right hand (controlled by left brain — the language hemisphere) while reading. The two functions are competing for the same hemisphere.
Language and brain are deeply intertwined. Studying their connection has taught us about both — how the brain works AND what language really is. Each new finding reveals more wonder.
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