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Diseases of the nervous system

diseases of the nervous system
Diseases of the nervous system, which can also be known as central nervous system disorders, are a group or set of neurological disorders which affect the function or structure of the brain or spinal cord, which generally form the central nervous system.

The spinal cord:

The spinal cord is a vital part of the nervous system which transmits sensory reception from the
peripheral nervous system. The spinal cord also conducts motor information to the body's cardiac muscles, smooth muscles, skeletal muscles , and glands . There are 31 pairs of spinal nerves which run along the spinal cord, all of which consist of both sensory and motor neurons. The spinal cord is protected by vertebrae which connects the peripheral nervous system to the brain, and it also acts as a "minor" coordinating center.

The brain:

The brain works as the organic basis of cognition and also has centralized control over the other organs of the body. The brain works asthe control center of the body and controls every activity and process of the body. The brain is guarded by the skull but if by chance the brain should get damaged, significant impairments in cognition, physical and physiological function or death may occur.

There are different types of disorders and diseases which the nervous system can suffer from which can range from mild diseases and dysfunctions which can be managed normally to deadly fast killing diseases which can cause an instant shutdown of the nervous system which will then result to instant death.


Addiction is the dysfunction of the brain's reward system which arises through transcriptional and epigenetic mechanisms and occurs over time from very high levels of exposure to stimulus which can induce an addiction to the brain (e.g., sexual intercourse, morphine, gambling, cocaine, etc.)

Arachnoid cysts
Arachnoid cysts
They are cerebrospinal fluid which are covered by arachnoidal cells that can develop on the spinal cord or the brain. They are a congenital disorder, and in few cases might not show symptoms. However, if there is a large cyst, symptoms may include, Ataxia (lack of muscle control), hemiparesis, headache, seizures and several others.

 Macrocephaly and ADHD are very common among children, while pre-senile dementia, hydrocephalus (an abnormality of the dynamics of the cerebrospinal fluid), and urinary incontinence are symptoms for elderly patients (65 and older).

Attention deficit/hyperactivity disorder (ADHD)

Attention deficit/hyperactivity disorder (ADHD)
ADHD is currently considered to be a genuine organic disorder of the nervous system. ADHD, which in severe cases can be debilitating, has symptoms that is thought to be caused by structural as well as biochemical imbalances in the brain; in particular, low levels of the neurotransmitters norepinephrine and dopamine which are in charge of controlling and maintaining attention and movement.

 Many people with ADHD continue to have symptoms well into adulthood. Also of note is an increased risk of the development of Dementia with Lewy bodies, or (DLB), & a direct genetic association of Attention deficit disorder to Parkinson's disease
 two progressive, and serious, neurological diseases whose symptoms often occur in people over age 65.


Autism or autism’s pectrum disorder can be said to be a neurodevelopmental disorder that is characterized by restricted and repetitive patterns of behavior and persistent deficits in social interaction and communication. 

Autism can also be refered as a range of conditions characterized by challenges with social skills, repetitive behaviors speech and nonverbal communication.

Bipolar disorder

Bipolar disorder
Bipolar disorder is a very serious illness of the nervous system. Mood swings from the highs of mania to the lows of deep depression usually occurs over several weeks to months. Symptoms can include both signs of major depression & mania.


Catalepsy is a nervous disorder characterized by trance or seizure, immobility and muscular rigidity, along with a decreased sensitivity to pain. Catalepsy is a symptom of serious diseases of the nervous system (e.g., Epilepsy ,  Parkinson's disease , etc.) rather than a disease by itself. Cataleptic fits can range in duration from several minutes to days and weeks


depression, nervous system
Major depressive disorder, otherwise known as depression, is a disorder that is characterized by a pervasive and persistent low mood that is accompanied by low self-esteem and by a loss of interest or pleasure in normally enjoyable activities. It causes severe symptoms on the way you think, feel and take care of daily activities.


Encephalitis is known as an acute inflammation of the brain. It is usually caused by a foreign substance, or the immune system attacking the brain tissues by error or a viral infection. Symptoms of this disease include headache, neck pain, vomiting, drowsiness, nausea, and fever. Complications from this inflammation can result to seizures hallucinations and memory problems.


Epilepsy is a very serious, unpredictable and fatal disorder of the nervous system, which is thought to be as a result of faulty electrical activity in the brain. Epileptic seizures result from abnormal, excessive, or hyper synchronous neuronal activity in the brain. Epilepsy becomes more common as people age. Onset of new cases occurs most times in infants and the elderly. Epileptic seizures may occur in patients recovering from brain surgery.

Locked-in syndrome

Locked-in syndrome
Locked-in syndrome usually results from a stroke that damages a part of the brainstem, in which the body and most of the facial muscles are paralysed but consciousness remains and the ability to perform certain eye movements are maintained.


Meningitis is an acute inflammation of the membranes surrounding the brain and the spinal cord. It is often caused by a bacterial or viral infection. Vomiting, headache, Fever,  and a stiff neck are all symptoms of meningitis.


A chronic, often debilitating neurological disorder characterized by recurrent moderate to severe headaches. Typically, this headaches affect one half of the brain.

Multiple sclerosis

Multiple sclerosis
Multiple sclerosis (MS) is a chronic, inflammatory demyelinating disease, which simply means that the myelin sheath of neurons is damaged. Multiple sclerosis is a disabling disease of the central nervous system. Symptoms of MS include visual and sensation problems, muscle weakness, numbness and tingling all over, muscle spasms, poor coordination, and depression.

Neurodegenerative disorders

Alzheimer’s disease

alzheimers disease
Alzheimer’s is a type of dementia that causes problems with thinking memory and behavior. 
Image result for diseases of the nervous system
Alzheimer's is a neurodegenerative disease typically found in people over the age of 65 years. Worldwide, approximately 24 million people have dementia; 60% of these cases are due to Alzheimer’s. The ultimate cause is unknown. The clinical sign of Alzheimer's is progressive cognition deterioration.

Huntington's disease

Huntington's disease
Huntington's disease also known as Huntington’s cholera is an inherited degenerative neurological disorder that results in the death of brain cells. Degeneration of neuronal cells occurs throughout the brain, especially in the striatum. There is a progressive decline that results in abnormal movements. Symptoms include problems with mood and mental and functional abilities.

Parkinson's disease

Parkinson's disease
Parkinson's disease, is a progressive illness of the nervous system which is by the death of dopamine-producing brain cells that affect motor skills and speech. Symptoms may include muscle rigidity,  bradykinesia (slow physical movement), and tremors. Behavior, thinking, sensation disorders, and the sometimes co-morbid skin condition Seborrheic dermatitis are just some of Parkinson's disease numerous no motor symptoms.

Tourette's syndrome

Tourette's syndrome
Tourette's syndrome is an inherited neurological disorder characterized by repetitive stereotyped involuntary movements and vocalizations. Early onset may be during childhood, and it is characterized by physical and verbal tics

Trauma brain injury

Trauma brain injury
Trauma brain injury also known as intracranial injury occurs when an internal force injures the brain. Trauma brain injury can be classified based on mechanism, severity and other features.
Any type of traumatic brain injury (TBI) or injury done to the spinal cord can result in a wide spectrum of disabilities in a person.

List of central nervous system infections

Infectious diseases are transmitted in so many ways. Some of these infections may affect the brain or spinal cord directly. Generally, an infection is a disease that is caused by the invasion of a microorganism or virus.


Degenerative spinal disorders involve a loss of function in the spine. Pressure on the spinal cord and nerves may be associated with herniation or disc displacement. Brain degeneration also causes central nervous system diseases
Common structural defects include anencephaly, birth defects, hypospadias , and spina bifida . Children that are born with structural defects may have heart problems,  malformed limbs, and facial abnormalities.


brain tumour
A tumor is an abnormal growth of body tissue which forms lumps or growths. They grow and behave differently depending on whether they are cancerous or non cancerous. In general, they appear when there is a problem with cellular division. Problems with the body's immune system can lead to tumors.

Autoimmune disorders

Autoimmune disorders
An autoimmune disorder is a condition where in the immune system attacks and destroys healthy body tissue. This is caused by a loss of tolerance to the proteins in the body, thus resulting in immune cells recognizing them as 'foreign' and directing an immune response against them.


stroke brain
A stroke is an interruption or the total stopping of the supply of blood to the brain. This is can happen when a blood vessel is blocked by a blood clot or when a blood vessel ruptures, causing blood to leak to the brain. If the brain cannot get enough oxygen and blood, brain cells can die, leading to permanent damage.

Other neurological malfunctions and disorders include:

 Mental health problems, such as anxiety disorders ,
depression , or psychosis .
Problems that are present at birth (congenital).
Exposure to toxins, such as carbon monoxide , arsenic, or lead.
Amyotrophic lateral sclerosis (ALS).
Overuse of or withdrawal from prescription and nonprescription medicines, illegal drugs, or alcohol.
A sudden (acute) nervous system problem can cause many different symptoms, depending on the area of the nervous system involved. Stroke and transient ischemic attack (TIA) are common examples of acute problems. A patient of sudden (acute) nervous system problem may experience the sudden onset of one or more symptoms, such as:
Numbness, tingling, weakness, or inability to move a part or all of one side of the body (paralysis).
Sudden, severe headache.
Confusion or a change in level of consciousness or behavior.
Dimness, blurring, double vision, or loss of vision in one or both eyes.
Loss of speech, trouble talking, or trouble understanding speech.
Dizziness, unsteadiness, or the inability to stand or walk, especially if other symptoms are present.
Severe nausea or vomiting.

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