Nervous System

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The nervous system is a multifaceted network of nerves and cells that transmits messages to and from the brain and spinal cord to different parts of the body.

It comprises of two parts one among them is the Central nervous system and the other one is Peripheral nervous system. Both the nervous systems functions differently and developed of different nervous systems. While Central nervous system is made of brain and spinal cord whereas Peripheral nervous system comprises of Somatic and Autonomic nervous system.

The brain deceit inside the skull and is formed in a mushroom like shape. The brain stem, cerebrum, cerebellum and the diencephalon are the four basic parts of brain.

Spinal cord is a long structure which widens from the brain. It consists of series of 31 segments and a pair of spinal nerves emerges out of each section and that region is termed as spinal section or segment.

Somatic nervous system that comprises of tangential nerve fibers that choose sensations from the distant organs and transmit them to central nervous system.

Motor nerve fibers which is a part of somatic nervous system that comes out of the brain and transmits messages for movement and necessary action to skeletal muscles. The process nearly takes a second to complete.

Autonomic nervous system consists of three parts:

The first being, sympathetic nervous system which means it reins the nerves of the inner organs of the body on which humans have no mindful control and it comprises digestion, heartbeat etc.

The second is parasympathetic nervous system weakens the smooth instinctive muscles and glands.

Lastly, the enteric nervous system is a composite network of nerve fibers that transform the organs inside the abdomen.

Disease Realated to Nervous System:

  • NEUROFIBROMATOSIS
  • TAY SACHS DISEASE