Text II
A longitudinal fissure separates the human brain into two distinct cerebral hemispheres, connected by the
corpus callosum. The sides resemble each other and each hemisphere’s structure is generally mirrored by the other
side. Yet despite the strong similarities, the functions of each cortical hemisphere are different Ph
Popular psychology tends to make broad and sometimes pseudoscientific generalizations about certain
functions (e.g. logic, creativity) being lateral, that is, located in either the right or the left side of the brain.
Researchers often criticize popular psychology for this, because the popular lateralizations are often distributed
across both hemispheres, although mental processing is divided between them.
Fundamental to brain process lateralization is the fact that the lateral sulcus generally is longer in the left
hemisphere than in the right hemisphere. The extent of specialized brain function by area remains under
investigation. If a specific region of -the brain is either injured or r destroyed, its functions can sometimes be
recovered by a neighboring region, even in the opposite hemisphere, depending upon the area damaged and the
patient’s age.
Brain function lateralization is evident in the phenomena of right- or left-handedness and of right or left ear
preference, but a person’s preferred hand is not a clear indication of the location of brain function. Although 95% of
right-handed people have left-hemisphere language function, only 18.8% of left-handed people have right
hemisphere language function. Additionally, 19.8% of the left-handed have bilateral language functions.
4. According to the text, when there is damage in a specific region, its function____________