- (D) The prefrontal cortex of Phineas Gage’s brain was damaged by his accident while laying the
railroad track. This part of the brain plays a vital role in judgment and decision making, and the
damage helps explain how Gage’s personality changed from dependable and even-tempered to
irascible and irresponsible. The corpus callosum is the band of neurons that links the brain’s two
hemispheres. The temporal lobes are located on the sides of the head just above the ears and house
the auditory cortex. The medulla oblongata sits atop the spinal cord and helps regulate involuntary
activities like heart rate. The midbrain is part of the brainstem and contains the reticular formation,
which regulates arousal.
marvins-underground-k-12
(Marvins-Underground-K-12)
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