Each cerebral hemisphere has four lobes: frontal, temporal, parietal, and occipital. Each lobe can be further divided into specialized areas researchers believe are critical for performing particular functions. The frontal lobe is the main center for personality, judgment, and emotions. Scientists believe the areas responsible for self-awareness and intelligence also reside in the frontal lobe. In the left hemisphere, the frontal lobe is where you will find Broca's area, a collection of neurons responsible for the production of speech. Damage to this area can make communication difficult.
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