We all know that the brain has two separate hemispheres but many people are not exactly sure what the function of each of these hemispheres are.
The left hemisphere is responsible for logical thinking and communication skills. While the right hemisphere is responsible for symbolic thought and creativity, although recent research has been contradicting, proving that there are parts of the right hemisphere for creativity and vice versa. In left-handed people the functions are reversed.
The left hemisphere is said to be dominant because of two specialized areas: Broca’s area (B), motor cortex responsible for speech and Wernicke’s area (W), the cortex responsible for verbal comprehension.
The corpus callosum is located deep in the interhemispheric fissure, or sagittal fissure is the structure responsible for the connection between the two cerebral hemispheres. This structure, composed of nerve fibers white (Freixes axon wrapped in myelin), is responsible for the exchange of information between the different areas of the cerebral cortex.
The motor cortex is responsible for the control and coordination of voluntary motor function. Fractures in this area cause muscle weakness or even paralysis. The left hemisphere of the motor cortex controls the right side of the body and the right hemisphere motor cortex controls the left side of the body.
The premotor cortex is responsible for motor learning and the precision movement. It is in the frontal area of the cortex, the Broca’s area that has to do with communication (both verbal and non-verbal).
It is up to the cortex of the cerebellum that handles our eye hand coordination, motor skills, maintaining balance and posture. The cerebellum is about 10% of the brain neurons and contains more than other parts of the two hemispheres combined.
The axis formed by the anterior pituitary gland and hypothalamus, are responsible for the self regulation of the internal functioning of the body. The homeostatic functions of the body (cardio-respiratory function, circulatory, regulation of water levels, nutrients, internal temperature, etc.) are controlled automatically.
The two hemispheres cooperate with one another, if one hemisphere does not work, the other has a hard time holding up.
The left hemisphere acts with portions and “shreds” information, piece by piece, we can designate as the hemisphere of logic and reason. In equivalence, the right hemisphere works with total units, designated as the creator and obvious hemisphere. But these designations are not as linear as that.
A conversation is not a mere exchange of words, the tone of what is said and the body language is important for the completion of the message, but only with the help of the two hemispheres is that you can encode the message in full.
Two important language related brain areas
There are two important parts of language in the left hemisphere that work in sync to produce the desired results.
One of them, the “Broca’s area” and the other area is Wernicke which is located more posteriorly located in the temporal lobe, near the hearing center, this is where we understand the meaning of words and where word association is developed. However, the process of understanding complex languages encompasses many more parts of the brain associated with cerebral hemispheres.