epilepsia

Epilepsy is a brain disorder that causes people to have recurring seizures. The seizures happen when clusters of nerve cells, or neurons, in the brain send out the wrong signals. People may have strange sensations and emotions or behave strangely. They may have violent muscle spasms or lose consciousness.

Epilepsy has many possible causes, including illness, brain injury, and abnormal brain development. In many cases, the cause is unknown.

Doctors use brain scans and other tests to diagnose epilepsy. It is important to start treatment right away. There is no cure for epilepsy, but medicines can control seizures for most people. When medicines are not working well, surgery or implanted devices such as vagus nerve stimulators may help. Special diets can help some children with epilepsy.

NIH: National Institute of Neurological Disorders and Stroke

Seizures are symptoms of a brain problem. They happen because of sudden, abnormal electrical activity in the brain. When people think of seizures, they often think of convulsions in which a person's body shakes rapidly and uncontrollably. Not all seizures cause convulsions. There are many types of seizures and some have mild symptoms. Seizures fall into two main groups. Focal seizures, also called partial seizures, happen in just one part of the brain. Generalized seizures are a result of abnormal activity on both sides of the brain.

Most seizures last from 30 seconds to 2 minutes and do not cause lasting harm. However, it is a medical emergency if seizures last longer than 5 minutes or if a person has many seizures and does not wake up between them. Seizures can have many causes, including medicines, high fevers, head injuries and certain diseases. People who have recurring seizures due to a brain disorder have epilepsy.

NIH: National Institute of Neurological Disorders and Stroke

Movement disorders are neurologic conditions that cause problems with movement, such as:

• Increased movement that can be voluntary (intentional) or involuntary (unintended)
• Decreased or slow voluntary movement

There are many different movement disorders. Some of the more common types include:

• Ataxia, the loss of muscle coordination
• Dystonia, in which involuntary contractions of your muscles cause twisting and repetitive movements. The movements can be painful.
• Huntington's disease, an inherited disease that causes nerve cells in certain parts of the brain to waste away. This includes the nerve cells that help to control voluntary movement.
• Parkinson's disease, which is a disorder that slowly gets worse over time. It causes tremors, slowness of movement, and trouble walking.
• Tourette syndrome, a condition that causes people to make sudden twitches, movements, or sounds (tics)
• Tremor and essential tremor, which cause involuntary trembling or shaking movements. The movements may be in one or more parts of your body.

Causes of movement disorders include:

• Genetics
• Infections
• Medicines
• Damage to the brain, spinal cord, or peripheral nerves
• Metabolic disorders
• Stroke and vascular diseases
• Toxins

Treatment varies by disorder. Medicines can cure some disorders. Others get better when an underlying disease is treated. Often, however, there is no cure. In that case, the goal of treatment is to improve symptoms and relieve pain.

Aphasia is a language disorder that makes it hard for you to read, write, and say what you mean to say. Sometimes it makes it hard to understand what other people are saying, too. Aphasia is not a disease. It's a symptom of damage to the parts of the brain that control language.

The signs of aphasia depend on which part of the brain is damaged. There are four main types of aphasia:

• Expressive aphasia is when you know what you want to say, but you have trouble saying or writing your thoughts.
• Receptive aphasia affects your ability to read and understand speech. You can hear what people say or see words on a page, but you have trouble making sense of what they mean.
• Global aphasia is the loss of almost all language ability. You can't speak, understand speech, read, or write.
• Anomic or amnesia aphasia is when you have trouble using the right words for certain things, people, places or events.

In some cases, aphasia may get better on its own. But it can be a long-term condition. There's no cure, but treatment may help improve language skills.

Aphasia happens from damage to one or more parts of the brain involved with language. The damage may be from:

• Stroke, which is the most common cause of aphasia
• Brain tumor
• Brain infection or inflammation
• Brain injury
• Other brain disorders or neurologic diseases that affect the brain and get worse over time, such as dementia

Anyone can have aphasia at any age, but most people with aphasia are middle-aged or older. Most aphasia happens suddenly from a stroke or brain injury. Aphasia from a brain tumor or other brain disorder may develop slowly over time.

If a health care provider sees signs of aphasia, the provider will usually:

• Test the person's ability to understand language and speech. This includes asking questions and checking to see if the person can follow simple commands.
• Order an imaging scan to see if there's a brain injury and what part of the brain is damaged. Possible tests include:
  • MRI
  • CT scan

If imaging shows signs of aphasia, more tests may be needed. These tests measure how much the brain damage has affected the ability to talk, read, write, and understand. In most cases, the tests are done by a speech-language pathologist or speech therapist (a specialist who treats speech and communication disorders).

Some people fully recover from aphasia without treatment. But most people should begin speech-language therapy to treat aphasia as soon as possible.

Treatment may be one-on-one with a speech therapist or in a group. Therapy using a computer may also be helpful.

The specific therapy depends on the type of language loss that a person has. It may include exercises in reading, writing, following directions, and repeating what the therapist says. Therapy may also include learning how to communicate with gestures, pictures, smartphones, or other electronic devices.

Family participation may be an important part of speech therapy. Family members can learn to help with recovery in many ways, such as:

• Using simpler language
• Including the person with aphasia in conversations
• Repeating or writing down key words to help communicate more clearly

How much a person recovers depends on many things, including:

• What caused the brain injury
• What part of the brain was hurt
• How badly and how much of the brain was hurt
• The age and health of the person

You can help prevent aphasia by:

• Making heart-healthy lifestyle changes to lower your chance of having:
  • A stroke
  • Heart disease
  • Vascular disease (problems with your blood vessels)
• Protecting your brain from injury:
  • Wearing the right helmet for sports safety, such as when riding a bike
  • Taking action to prevent falls
  • Always wearing your seatbelt and driving safely

NIH: National Institute on Deafness and Other Communication Disorders

Your bones are made of living tissue. To keep them strong, your body breaks down old bone and replaces it with new bone. But when more bone is broken down than replaced, you lose bone density, also called bone mass. Bone density is a measure of the amount of calcium and other minerals in bone. Bones containing more minerals are denser. They tend to be stronger and less likely to fracture (break).

Losing bone density can weaken your bones. In some cases, it can lead to osteoporosis. This is a disease which can make your bones more likely to break. Low bone density that is not low enough to be osteoporosis is sometimes called osteopenia.

Your bones become less dense as you age. Other factors can also make you more likely to lose bone mass, such as:

• A family history of osteoporosis or low bone mass
• Not developing good bone mass when you are young
• Having certain medical conditions, such as:
  • Endocrine diseases
  • Certain digestive diseases
  • Rheumatoid arthritis
  • Certain types of cancer
  • HIV
  • Anorexia nervosa, a type of eating disorder
• Taking certain medicines, such as:
  • Corticosteroids
  • Proton pump inhibitors (which treat GERD)
  • Medicines to treat epilepsy
• Smoking tobacco
• Long-term heavy alcohol use
• Physical inactivity or prolonged periods of bedrest

Not everyone who has low bone mass gets osteoporosis, but they are at higher risk for developing it.

A bone density scan is the best way to measure your bone health. It compares your bone density, or mass, to that of a healthy person who is the same age and sex as you are. It can show:

• Whether you have low bone density
• Whether you have osteoporosis, a disease that makes your bones weak
• Your risk for breaking bones
• Whether your osteoporosis treatment is working

To help keep your bones strong and help prevent osteoporosis, the best thing to do is to eat a healthy diet rich in calcium and vitamin D. Getting regular physical activity, limiting alcohol, and not smoking can also help. In some cases, your health care provider may prescribe medicines to prevent osteoporosis.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

When you play the piano or hit a tennis ball you are activating the cerebellum. The cerebellum is the area of the brain that controls coordination and balance. Problems with the cerebellum include:

• Cancer
• Genetic disorders
• Ataxias - failure of muscle control in the arms and legs that result in movement disorders
• Degeneration - disorders caused by brain cells decreasing in size or wasting away

Treatment of cerebellar disorders depends on the cause. In some cases, there is no cure but treatment may help with symptoms.

NIH: National Institute of Neurological Disorders and Stroke

Dementia is a loss of mental functions that is severe enough to affect your daily life and activities. These functions include:

• Memory
• Language skills
• Visual perception (your ability to make sense of what you see)
• Problem solving
• Trouble with everyday tasks
• The ability to focus and pay attention

It is normal to become a bit more forgetful as you age. But dementia is not a normal part of aging. It is a serious disorder that interferes with your daily life.

The most common types of dementia are known as neurodegenerative disorders. These are diseases in which the cells of the brain stop working or die. They include:

• Alzheimer's disease, which is the most common form of dementia among older people. People with Alzheimer's have plaques and tangles in their brain. These are abnormal buildups of different proteins. Beta-amyloid protein clumps up and forms plaques in between your brain cells. Tau protein builds up and forms tangles inside the nerve cells of your brain. There is also a loss of connection between nerve cells in the brain.
• Lewy body dementia, which causes movement symptoms along with dementia. Lewy bodies are abnormal deposits of a protein in the brain.
• Frontotemporal disorders, which cause changes to certain parts of the brain:
  • Changes in the frontal lobe lead to behavioral symptoms
  • Changes in the temporal lobe lead to language and emotional disorders
• Vascular dementia, which involves changes to the brain's blood supply. It is often caused by a stroke or atherosclerosis (hardening of the arteries) in the brain.
• Mixed dementia, which is a combination of two or more types of dementia. For example, some people have both Alzheimer's disease and vascular dementia.

Other conditions can cause dementia or dementia-like symptoms, including:

• Creutzfeldt-Jakob disease, a rare brain disorder
• Huntington's disease, an inherited, progressive brain disease
• Chronic traumatic encephalopathy (CTE), caused by repeated traumatic brain injury
• HIV-associated dementia (HAD)

Certain factors can raise your risk for developing dementia, including:

• Aging. This is the biggest risk factor for dementia.
• Smoking
• Uncontrolled diabetes
• High blood pressure
• Drinking too much alcohol
• Having close family members who have dementia

The symptoms of dementia can vary, depending on which parts of the brain are affected. Often, forgetfulness is the first symptom. Dementia also causes problems with the ability to think, problem solve, and reason. For example, people with dementia may:

• Get lost in a familiar neighborhood
• Use unusual words to refer to familiar objects
• Forget the name of a close family member or friend
• Forget old memories
• Need help doing tasks that they used to do by themselves

Some people with dementia cannot control their emotions and their personalities may change. They may become apathetic, meaning that they are no longer interested in normal daily activities or events. They may lose their inhibitions and stop caring about other peoples' feelings.

Certain types of dementia can also cause problems with balance and movement.

The stages of dementia range from mild to severe. In the mildest stage, it is just beginning to affect a person's functioning. In the most severe stage, the person is completely dependent on others for care.

Your health care provider may use many tools to make a diagnosis:

• A medical history, which includes asking about your symptoms
• A physical exam
• Tests of your thinking, memory, and language abilities
• Other tests, such as blood tests, genetic tests, and brain scans
• A mental health evaluation to see whether a mental disorder is contributing to your symptoms

There is no cure for most types of dementia, including Alzheimer's disease and Lewy body dementia. Treatments may help to maintain mental function longer, manage behavioral symptoms, and slow down the symptoms of disease. They may include:

• Medicines, which may temporarily improve memory and thinking or slow down their decline. They only work in some people. Other medicines can treat symptoms such as anxiety, depression, sleep problems, and muscle stiffness. Some of these medicines can cause strong side effects in people with dementia. It is important to talk to your health care provider about which medicines will be safe for you.
• Occupational therapy to help find ways to more easily do everyday activities
• Speech therapy to help with swallowing difficulties and trouble speaking loudly and clearly
• Mental health counseling to help people with dementia and their families learn how to manage difficult emotions and behaviors. It can also help them plan for the future.
• Music or art therapy to reduce anxiety and improve well-being

Researchers have not found a proven way to prevent dementia. Living a healthy lifestyle might influence some of your risk factors for dementia.

A genetic brain disorder is caused by a variation or a mutation in a gene. A variation is a different form of a gene. A mutation is a change in a gene. Genetic brain disorders affect the development and function of the brain.

Some genetic brain disorders are due to random gene mutations or mutations caused by environmental exposure, such as cigarette smoke. Other disorders are inherited, which means that a mutated gene or group of genes is passed down through a family. They can also be due to a combination of both genetic changes and other outside factors.

Some examples of genetic brain disorders include:

• Leukodystrophies
• Phenylketonuria
• Tay-Sachs disease
• Wilson disease

Many people with genetic brain disorders fail to produce enough of certain proteins that influence brain development and function. These brain disorders can cause serious problems that affect the nervous system. Some have treatments to control symptoms. Some are life-threatening.

Every pregnancy has some risk of problems, but there are certain conditions and health issues that can raise that risk, such as:

• A health condition you had before you got pregnant
• A health condition you develop during pregnancy
• A pregnancy with more than one baby
• A health problem that happened during a previous pregnancy and could happen again
• Substance use during pregnancy
• Being over age 35

Any of these can affect your health, the health of your baby, or both.

If you have a chronic condition, you should talk to your health care provider about how to minimize your risk before you get pregnant. Once you are pregnant, you may need a health care team to monitor your pregnancy. Some common conditions that can complicate a pregnancy include:

• High blood pressure
• Kidney problems
• Autoimmune diseases
• Obesity
• HIV
• Cancer
• Infections

Other conditions that may make pregnancy risky can develop during pregnancy - for example, gestational diabetes and Rh incompatibility. Good prenatal care can help detect and treat them.

Some symptoms, such as nausea, back pain, and fatigue, are common during pregnancy. Sometimes it is hard to know what is normal. Call your health care provider if something is bothering or worrying you.

Marijuana is a green, brown, or gray mix of dried, crumbled parts from the marijuana plant. The plant contains chemicals which act on your brain and can change your mood or consciousness.

There are many different ways that people use marijuana, including:

• Rolling it up and smoking it like a cigarette or cigar
• Smoking it in a pipe
• Mixing it in food and eating it
• Brewing it as a tea
• Smoking oils from the plant ("dabbing")
• Using electronic vaporizers ("vaping")

Marijuana can cause both short-term and long-term effects.

Short term:

While you are high, you may experience:

• Altered senses, such as seeing brighter colors
• Altered sense of time, such as minutes seeming like hours
• Changes in mood
• Problems with body movement
• Trouble with thinking, problem-solving, and memory
• Increased appetite

Long term:

In the long term, marijuana can cause health problems, such as:

• Problems with brain development. People who started using marijuana as teenagers may have trouble with thinking, memory, and learning.
• Coughing and breathing problems, if you smoke marijuana frequently
• Problems with child development during and after pregnancy, if a woman smokes marijuana while pregnant

It is possible to overdose on marijuana, if you take a very high dose. Symptoms of an overdose include anxiety, panic, and a rapid heartbeat. In rare cases, an overdose can cause paranoia and hallucinations. There are no reports of people dying from using just marijuana.

After using marijuana for a while, it is possible to get addicted to it. You are more likely to become addicted if you use marijuana every day or you started using it when you were a teenager. If you are addicted, you will have a strong need to take the drug. You may also need to smoke more and more of it to get the same high. When you try to quit, you may have mild withdrawal symptoms such as:

• Irritability
• Trouble sleeping
• Decreased appetite
• Anxiety
• Cravings

The marijuana plant has chemicals that can help with some health problems. More states are making it legal to use the plant as medicine for certain medical conditions. But there isn't enough research to show that the whole plant works to treat or cure these conditions. The U.S. Food and Drug Administration (FDA) has not approved the marijuana plant as a medicine. Marijuana is still illegal at the national level.

However, there have been scientific studies of cannabinoids, the chemicals in marijuana. The two main cannabinoids that are of medical interest are THC and CBD. The FDA has approved two drugs that contain THC. These drugs treat nausea caused by chemotherapy and increase appetite in patients who have severe weight loss from AIDS. There is also a liquid drug that contains CBD. It treats two forms of severe childhood epilepsy. Scientists are doing more research with marijuana and its ingredients to treat many diseases and conditions.

NIH: National Institute on Drug Abuse