Brain Disease: Causes, Symptoms, Types & Tests

The brain plays a key role in regulating many important functions in the body, such as movement, memory, speech, emotions, coordination, and basic functions. Brain diseases may impair these functions in various ways and can develop through alteration of genes, infections, trauma (injury), blood vessel problems, or tumors, as well as because of normal ageing or due to several health-related medical conditions. Many brain diseases can develop gradually, without any obvious signs, or become instantly apparent.

Early medical assessment may assist in narrowing down which symptoms they have and what tests may be needed to look for a potential cause of their symptoms. The advanced diagnostics offered at Molecular Diagnostics and Therapy help to assess and manage various brain and nervous system disorders.

What Is Brain Disease?

The term brain disease is used to describe many conditions that impact the brain or its daily activities. They might be temporary or chronic and can affect brain function, cognition, emotions, or the broader nervous system. People at any age can suffer from brain disorders. Symptoms and severity of their symptoms vary according to the condition and site of involvement in the brain. Many times, when the symptoms are present, a neurological examination is one of the first steps in the evaluation process, and further testing is required if necessary.

Common Causes of Brain Diseases

There are numerous causes of brain diseases. Some of them may be related to ageing, blood vessel changes, infection, injury, or genetic changes, or may be inherited. Some problems are common and may be due to:

• Genetic or inherited conditions
• Brain or head injuries
• Infections affecting the brain or nervous system
• Stroke and other blood vessel disorders
• Brain tumors
• Neurodegenerative conditions
• Certain autoimmune disorders
• Metabolic or nutritional problems
• Long-term effects of some other health conditions

The cause is not always immediately clear, which is why doctors may use a combination of medical history, neurological examination, laboratory tests, and imaging.

Brain Disease Symptoms

There is no single set of symptoms associated with any condition, and the symptoms depend on the region of the brain involved. Some symptoms might occur suddenly, and some might spread over time. Common symptoms of brain diseases are headaches that won't go away or an unusual type of headache, memory loss, difficulty concentrating, confusion, seizures, dizziness, difficulty with balance or coordination, weakness or numbness, changes to vision or speech, tremors, and behaviour or mood changes. 

Headaches, memory loss, and dizziness don't necessarily mean brain disease. But if symptoms last for longer than usual, get worse, are unusual, and/or are linked to new neurological problems, it is advisable to have a health care professional evaluate them.

Types of Brain Diseases

Brain diseases are of many types and could be classified based on their cause and effects.

Neurodegenerative Diseases

Diseases and disorders like Alzheimer's or Parkinson's can gradually impair the operation of the brain. These can affect memory, thinking, movement, co-ordination, or any other function.

Epilepsy

Epilepsy is a condition of the nervous system that is characterized by recurring seizures. EEG may be performed to assess the electrical functions of the brain, while CT or MRI may help to evaluate potential structural issues.

Stroke

A stroke happens when blood flow to the brain is blocked or a blood vessel in the brain leaks (or ruptures). It may lead to sudden weakness, difficulty speaking, vision changes, confusion, or coordination/movement issues.

Brain Tumors

Brain tumors are abnormal growths that can occur in different areas of the brain. Symptoms may involve headaches, seizures, weakness, vision and speech problems, balance issues, and cognition/behaviour issues. Magnetic resonance imaging (MRI) or computed tomography (CT) scan might be used to diagnose and pinpoint the location of a brain tumour.

Brain Infections

The brain and surrounding structures can be affected by infections like encephalitis and meningitis. Blood tests, brain imaging, EEG (electroencephalogram), or a cerebrospinal fluid test may be used, depending on what it is suspected to be.

Brain Diagnostic Tests

Not all brain diseases can be diagnosed by a single test. Depending on the symptoms, medical history, physical exam, and suspected diagnosis, the tests ordered are determined.

Neurological Examination

During a neurological exam, the doctor evaluates functions of the nervous system, including memory, thought, coordination, movement, reflexes, sensation, speech, and balance. It may help the doctor determine those areas that might require more of an evaluation.

MRI and CT Scan

MRI is used to give detailed images of the brain, and it can help to check if there are any abnormalities in the structure of the brain. Sometimes a CT scan is also helpful and may be used in certain emergencies, injuries, bleeding, or suspected stroke.

EEG

An electroencephalogram, or EEG, is a tracing of the brain's electrical activity. Used routinely for suspected epilepsy and other brain dysfunction disorders.

Blood Tests

Blood tests might be taken to identify infections, metabolic issues, nutritional deficiencies, thyroid problems, or other abnormalities that can lead to or be related to neurological symptoms.

PET Scan

In certain cases, PET brain imaging can give information regarding brain metabolism and function. May be considered to assess some neurological or cognitive disorders as warranted.

Lumbar Puncture

CSF may be obtained for testing in a procedure referred to as a lumbar puncture, or spinal tap. It is sometimes used if doctors suspect some infections, inflammatory conditions, or other neurological diseases.

When Should You Seek Medical Evaluation?

Some neurological symptoms need immediate medical attention. Urgent evaluation is needed for sudden weakness or numbness, difficulty speaking, sudden confusion, loss of balance, seizures, or sudden changes in vision. If symptoms develop over time, as with some persistent memory impairment, headaches, tremors, and/or problems maintaining balance, a health care professional may decide if additional neurological evaluations are warranted.

Brain Diagnostic Services at Molecular Diagnostics and Therapy

Molecular Diagnostics and Therapy offers diagnostic services that are used to help assess a variety of health issues. Relevant imaging, laboratory and/or specialist diagnostic investigations may be advised depending on the clinical needs of the patient. Test selection should always be determined by the patient's symptomatology, medical history and examination and the suspected condition. This is because test results are only part of what needs to be taken into account and should be considered by qualified health care workers only.

Conclusion

Brain diseases are a variety of conditions that may interfere with the way the brain works and cause problems with memory, movement, speech, coordination, behaviour, and so on. Their causes and symptoms can differ widely; when unusual and persistent symptoms occur, it is important that they be properly examined and evaluated medically. Brain diagnostic tests may include neurological examination, blood tests, MRI, CT, EEG, PET imaging, and cerebrospinal fluid testing, depending on the suspected condition. No single test is suitable for every patient. Molecular Diagnostics and Therapy offers diagnostic services that support the evaluation and monitoring of different health conditions, helping healthcare professionals obtain the information needed for appropriate medical decisions.