While the two hemispheres of the brain are almost identical, there are differences between the two hemispheres.
Some structures and their functions are found online one side of the brain.
For example, two areas of the brain that are very important for language, Broca’s area in the frontal lobe and Wernicke’s area in the temporal lobe, are in the left hemisphere for most of us.
Broca’s area is located in the left frontal lobe.
It is involved in controlling the motor ability to produce speech.
Wernicke’s area is located in the left temporal lobe. It is involved in language comprehension.
The angular gyrus is found in both hemispheres, but is is only involved in language on the left hemisphere.
It supports reading by translating written language into an auditory code.