If we consider our body as a machine, then the cenrtal processing unit(CPU) or the main controller of this machine is our brain and the nervous system put together. They send out the commands and the actions to handle all the activities of our body and are responsible for various senses we feel. A person with damaged nervous system is mentally challenged and unstable. Without the aid of the brain one can neither taste, nor feel or even identify any object. Damage to any other organ can be cured but damage to brain leaves a person handicapped both mentally and physically.
It can be expressed as the highly specialized network of complex and sophisticated system containing billions of neurons. The nervous system is responsible for coordinating as well as controlling entire functions of the body. It has two components, the central nervous system and the peripheral nervous system. Along with these two component system, other principal organs which are a part of this system are ears, eyes, sensory organs of smell, sensory organs of taste and sensory receptors located in skin, muscles, joints and other body parts.
The peripheral nervous system is divided into three divisions depending upon their particular functions,
The complex network of nervous system coordinates and controls the entire activities of the body by transmitting signals or messages from brain to various regions of our body and vice versa. Our nervous system takes assistance of neurons for conducting signals between two nervous system components i.e. peripheral nervous system and central nervous system. The neurons are of two types: sensory neurons and motor neurons. Along with neurons, glial cells which support and surround neurons also take part in the signal transmission process. The sensory nervous create and send the stimuli which are forwarded by the sensory organs like nose, skin, eye, to the Central nervous system. The brain performs the function of processing and sending these stimuli back again to the other body parts intimating them to respond to a specific type of stimulus. The motor takes signals from the spinal cord and the brain and send them to other body organs. Electrochemical signals or neurotransmitters are used by the neurons for transmitting the signals from one neuron to another. Different brain parts are in charge of various functions of body which is coordinated through the specialized neuron network. The coordination between central as well as peripheral nervous system is responsible for proper nervous system functioning.
The nervous system is a very sensitive network and hence is vulnerable to many diseases. It can get damaged due to infections, trauma, structural effects, tumors, degeneration, autoimmune disorders or blood flow disruption. Some of the common disorders of nervous system are: