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Left brain, right brain, prefrontal cortex, amygdala: these are parts of the brain where various types of thinking occur. The left brain/right brain paradigm, where one side of the brain manages some kinds of tasks is a bit dated and did not show up in research watching brain function using magnetic resonance imaging, but it is clear that there are different parts of the brain that manage emotional functions and others that manage logical functions. The observed dominance in everyday life of emotive over rationalism from person to person is still there no matter whence they come.
The prefrontal cortex and the amygdala connect these two hemispheres. Wildly oversimplifying, the prefrontal cortex manages sensory, memory, the ability to plan, etc. It synthesizes perception and memory, processing it into action or inaction, making plans, etc.