Nervous System

Nervous System

nervous system - a nerve cell
nervous system - a nerve cell

The nervous system plays a vital role for human beings and other living things to work its way every day. Our nervous system contains our brain and spinal cord (the main controllers of our body). This is composed of two main parts: Central nervous system and the Peripheral nervous system.

Our central nervous system contains the brain and spinal cord. While our peripheral nervous system contains the sensory neurons and nerves connected to our central nervous system. Our neurons are responsible in sending signals to cells by playing the role of chemical waves through thin fibers identified as axons. This action then causes chemicals called neurotransmitters to be released at synapses, junctions located in our brain cells. Sensory neurons are triggered by a physical stimulus while the motor neurons are connected to muscles and organs.

Nervous System Functions

The nervous system can work in a fast phase and be responsible in sending signals from one cell to another in order to attain a function. Basically, the brain acts as a sender, messenger, and a transporter.

Releasing of chemicals

One basic function of the nervous system is to provide prompts for the release of vital chemicals such as our hormones. These hormones are essential in our circulation as well as in regulating our body system.

Control body actions

This is the primary action of our nervous system. It includes encoding and decoding of the signals transmitted for to be taken action. This process is very essential and should be congruent.

Diseases (Disorders)

Disorders of the nervous system primarily depend on the affected region. Since the nervous system is divided into two, the conditions are presented according to the division they are included:

Central nervous system diseases:


This condition is the inflammation of the brain. This is primarily caused by a viral infection. The young are commonly affected and is characterized by the following symptoms: headache, drowsiness, nausea and fever.


The meninges are affected (the cell membranes of our brain and spinal cord). There is inflammation involved which is usually caused by a bacterial or viral infection.


Alzheimer’s a degenerative disorder that affects the brain of the patient, a form under the condition of dementia. The old or people ages 65 and above are commonly affected who presents a progressive cognitive deterioration.


This is a rare genetic condition that primarily presents progressive abnormal movements. Huntington’s includes cognitive decline and dementia. There are involuntary movements called chorea.


Parkinson’s is a well known condition that involves the deterioration of motor and speech skills. The first symptom identified with this condition is micrographia (change in handwriting to small writing, unlike usual). This involves the death of the dopamine-generating cells found in our brains, which is essential in our movements.


This is an inherited condition that involves involuntary movements or tics, as well as verbal tics. This condition is rare and can be weird, for the verbal tics can be inappropriate or insulting as well as with the motor tics.

Multiple sclerosis

Multiple sclerosis is a demyelinating condition, affecting the myelin sheath of our neurons. This is a condition that presents ascending paralysis, which starts with muscle weakness then visual and sensation problems.

Cerebrovascular accident

CVA or stroke is a very common brain condition that includes impediment of blood supply to the brain thus causing for a person to have grave changes in the motor and intellectual aspects.

Peripheral nervous system disorders:


This is a condition that affects a single (meaning mono) nerve. This is a neuropathic condition that includes the condition Carpal Tunnel Syndrome – caused by the compression of our nerves that lies at the carpal tunnel. The patient shall experience numbness of a finger or fingers that usually occurs at the hours of sleep.

Mononeuritis multiplex

Mononeuritis multiplex is a condition that involves loss of sensory and motor functions of peripheral nerves. This can be characterized by a deep, aching pain that can be worst at night.


This involves multiple nerves that are in a specific pattern of nerve damage. Motor and sensory symptoms are to be expected. It has been known that diabetes and impaired glucose tolerance are the main culprits of the condition.

Autonomic neuropathy

This is known as a form of polyneuropathy that affects internal organs. Those who have diabetes mellitus are affected. The nerves affected are said to be in no more conscious control of the patient.


This condition is the inflammation of the nerves. The symptoms for this condition include pain, paresthesia, paresis, numbness, paralysis and disappearance of reflexes.

Nervous System Facts

All of the presented conditions are primarily acquired through a physical, environmental or chemical condition. Specifically the conditions are caused by the following:


Injury of the spinal cord, nerves or brain can result to a wide variety of symptoms and disabilities.


Viral or bacterial infections can be a rooted cause for some conditions. The intrusion of the foreign body to our nervous system can cause a direct effect on the person thus resulting to conditions.


Degeneration of the parts of the nervous system cannot be controlled. The loss of the important and vital parts is congruent to the loss of essential functions of our body. This can be associated with aging and some inherited conditions.


Some structural defects that affect the nervous system are causative factors for our bodily dysfunctions.


The abnormal growth of tissues, especially malignant tumors, provide a grave effect to a person. This can impede bodily functions essential for our daily work.

Autoimmune disorders

These disorders are known to be unpreventable but can be controlled once treated. This involves attacking one’s own body and healthy cells.


Some conditions are hard to avoid because it is already in one’s genetic complex.

Underlying conditions

Some conditions are primarily caused by some disorders.


Some drugs are known to be toxic when taken abusively. This can cause some nervous system disorders. Others can cause irreversible conditions; therefore one should be very careful in taking their medications.

The nervous system is composed of millions of nerve cells. The brain has main controls: the right side of the brain controls the left side of the body while the left side of the brain controls the right side of the body. The brain can be only functional for about four percent. The nervous system if very essential for all living things, we need to take good care of our body in general so not to acquire such conditions affecting our body as a whole.

Nervous System Pictures

Photos, Images, Diagram and Pictures of Nervous System…

nervous system pictures

nervous system pictures

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