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What constitutes Nervous System?

Functional areas of the human brain diagram vector illustrations.


What constitutes Nervous System?


The nervous system is an integral part of the human body. It controls the functions of the other organs and also affects the way the body behaves. The nervous system has two parts central and peripheral. CNS consists of the brain and spinal cord. The two components have a protective triple-layered membrane called the meninges.

CNS has many roles to play in functioning. It controls psychological processes our thoughts, movements, emotions, and desires. It also regulates physiological functions like breathing, heart rate, the release of some hormones, body temperature, and much more. Nerve fibers that constitute the pat of CNS are the retina, optic nerve, olfactory nerves, and olfactory epithelium.

Know your Brain

The cerebrum part of the human brain has two hemispheres. Each consists of four lobes the frontal, parietal, temporal, and occipital. All four lobes perform different functions. The frontal regulates cognitive functions, such as thought and planning ahead and control of voluntary movement. The temporal generates memories and emotions. The parietal integrates input from different senses and regulates spatial orientation and navigation. Visual processing takes place in the occipital lobe, near the back of the skull.

The cerebellum lies beneath Cerebrum and plays a role in coordination and balance. It also has some cognitive functions. Thalamus and hypothalamus lie between the cerebrum and brainstem. The sensory system sends information through the thalamus to the cortex. The hypothalamus connects the nervous system to the endocrine, where hormones are produced via the pituitary gland.

The brainstem connects the brain with the spinal cord. It performs the function of relaying information between the brain and the body. It provides most of the cranial nerves to the face and head. The brainstem controls the heart functioning and breathing levels. Interconnected cavities in the brain produce cerebrospinal fluid. The fluid cushions around the brain and spinal cord and protect them from injury.


Brain size and Intelligence

Researches and medical studies nullify the myth that brain size bears a connection to intelligence. Evidence shows that geniuses in their field have smaller-than-average brains, while others have brains that are larger than average. Studies bring out that the reason behind humans intelligence, in part, is neurons and folds. The integration of the brain also affects the intelligence level of the person.  Studies support the fact that big size frontal lobes of the human brain are associated with higher-level functions such as self-control, planning, logic, and abstract thought.

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