Overview

A grand mal seizure causes a loss of consciousness and violent muscle contractions. It's the type of seizure most people picture when they think about seizures.

A grand mal seizure — also known as a generalized tonic-clonic seizure — is caused by abnormal electrical activity throughout the brain. Usually, a grand mal seizure is caused by epilepsy. But sometimes, this type of seizure can be triggered by other health problems, such as extremely low blood sugar, a high fever or a stroke.

Many people who have a grand mal seizure never have another one and don't need treatment. But someone who has recurrent seizures may need treatment with daily anti-seizure medications to control and prevent future grand mal seizures.

Source: http://www.mayoclinic.com

Symptoms

Grand mal seizures have two stages:

• Tonic phase. Loss of consciousness occurs, and the muscles suddenly contract and cause the person to fall down. This phase tends to last about 10 to 20 seconds.
• Clonic phase. The muscles go into rhythmic contractions, alternately flexing and relaxing. Convulsions usually last one to two minutes or less.

The following signs and symptoms occur in some but not all people with grand mal seizures:

• A scream. Some people may cry out at the beginning of a seizure.
• Loss of bowel and bladder control. This may happen during or following a seizure.
• Unresponsiveness after convulsions. Unconsciousness may persist for several minutes after the convulsion has ended.
• Confusion. A period of disorientation often follows a grand mal seizure. This is referred to as postictal confusion.
• Fatigue. Sleepiness is common after a grand mal seizure.
• Severe headache. Headaches may occur after a grand mal seizure.

When to see a doctor

Seek immediate medical help if any of the following occurs:

• The seizure lasts more than five minutes
• Breathing or consciousness doesn't return after the seizure stops
• A second seizure follows immediately
• You have a high fever
• You're experiencing heat exhaustion.
• You're pregnant.
• You have diabetes.
• You've injured yourself during the seizure.

If you experience a seizure for the first time, seek medical advice.

Additionally, seek medical advice for yourself or your child:

• If the number of seizures experienced increases significantly without explanation
• If new seizure signs or symptoms appear

Source: http://www.mayoclinic.com

Causes

Grand mal seizures occur when the electrical activity over the whole surface of the brain becomes abnormally synchronized. The brain's nerve cells normally communicate with each other by sending electrical and chemical signals across the synapses that connect the cells.

In people who have seizures, the brain's usual electrical activity is altered and many nerve cells fire at the same time. Exactly what causes the changes to occur often remains unknown.

However, grand mal seizures are sometimes caused by underlying health problems, such as:

Injury or infection

• Traumatic head injuries
• Infections, such as encephalitis or meningitis, or a history of such infections
• Injury due to a previous lack of oxygen
• Stroke

Congenital or developmental abnormalities

• Blood vessel malformations in the brain
• Genetic syndromes
• Brain tumors

Metabolic disturbances

• Very low blood levels of glucose, sodium, calcium or magnesium

Withdrawal syndromes

• Using or withdrawing from drugs, including alcohol

Source: http://www.mayoclinic.com

Diagnosis

After a seizure, your doctor will thoroughly review your symptoms and medical history. Your doctor may order several tests to determine the cause of your seizure and evaluate how likely it is that you'll have another one.

Tests may include:

• Neurological exam. Your doctor may test your behavior, motor abilities and mental function to determine if you have a problem with your brain and nervous system.
• Blood tests. Your doctor may take a blood sample to check for signs of infections, genetic conditions, blood sugar levels or electrolyte imbalances.
• Lumbar puncture. If your doctor suspects an infection as the cause of a seizure, you may need to have a sample of cerebrospinal fluid removed for testing.
• Electroencephalogram (EEG). In this test, doctors attach electrodes to your scalp with a paste-like substance. The electrodes record the electrical activity of your brain, which shows up as wavy lines on an EEG recording. The EEG may reveal a pattern that tells doctors whether a seizure is likely to occur again. EEG testing may also help your doctor exclude other conditions that mimic epilepsy as a reason for your seizure.
• Computerized tomography (CT) scan. A CT scan uses X-rays to obtain cross-sectional images of your brain. CT scans can reveal abnormalities in your brain that might cause a seizure, such as tumors, bleeding and cysts.
• Magnetic resonance imaging (MRI). An MRI uses powerful magnets and radio waves to create a detailed view of your brain. Your doctor may be able to detect lesions or abnormalities in your brain that could lead to seizures.
• Positron emission tomography (PET). PET scans use a small amount of low-dose radioactive material that's injected into a vein to help visualize active areas of the brain and detect abnormalities.
• Single-photon emission computerized tomography (SPECT). A SPECT test uses a small amount of low-dose radioactive material that's injected into a vein to create a detailed, 3-D map of the blood flow activity in your brain that happens during a seizure. Doctors may also conduct a form of a SPECT test called subtraction ictal SPECT coregistered to magnetic resonance imaging (SISCOM), which may provide even more-detailed results.

Source: http://www.mayoclinic.com

Complications

Having a seizure at certain times can lead to circumstances that are dangerous for you or others. You might be at risk of:

• Falling. If you fall during a seizure, you can injure your head or break a bone.
• Drowning. If you have a seizure while swimming or bathing, you're at risk of accidental drowning.
• Car accidents. A seizure that causes either loss of awareness or control can be dangerous if you're driving a car or operating other equipment.
• Pregnancy complications. Seizures during pregnancy pose dangers to both mother and baby, and certain anti-epileptic medications increase the risk of birth defects. If you have epilepsy and plan to become pregnant, work with your doctor so that he or she can adjust your medications and monitor your pregnancy, as needed.
• Emotional health issues. People with seizures are more likely to have psychological problems, such as depression and anxiety. Problems may be a result of difficulties dealing with the condition itself as well as medication side effects.

Lifestyle and home remedies

Here are some steps you can take to help with seizure control:

• Take medication correctly. Don't adjust the dosage before talking to your doctor. If you feel your medication should be changed, discuss it with your doctor.
• Get enough sleep. Lack of sleep can trigger seizures. Be sure to get adequate rest every night.
• Wear a medical alert bracelet. This will help emergency personnel know how to treat you correctly if you have another seizure.

Personal safety

Seizures don't usually result in serious injury, but if you have recurrent seizures, injury is a possibility. These steps can help you avoid injury during a seizure:

• Take care near water. Don't swim alone or relax in a boat without someone nearby.
• Wear a helmet for protection during activities such as bike riding or sports participation.
• Take showers instead of baths, unless someone is near you.
• Modify your furnishings. Pad sharp corners, buy furniture with rounded edges and choose chairs that have arms to keep you from falling off the chair. Consider carpet with thick padding to protect you if you do fall.
• Display seizure first-aid tips in a place where people can easily see them. Include any important phone numbers there, too.

Seizure first aid

It's helpful to know what to do if you witness someone having a seizure. If you're at risk of having seizures in the future, pass this information along to family, friends and co-workers so that they know what to do if you have a seizure.

To help someone during a seizure:

• Carefully roll the person onto one side
• Place something soft under his or her head
• Loosen tight neckwear
• Remove eyeglasses
• Avoid putting your fingers or other objects in the person's mouth
• Don't try to restrain someone having a seizure
• Clear away dangerous objects, if the person is moving
• Stay with the person until medical personnel arrive
• Observe the person closely so that you can provide details on what happened
• Time the seizure
• Check for a medical alert bracelet or ID
• Stay calm

Source: http://www.mayoclinic.com

Coping and support

If you're living with a seizure disorder, you may feel anxious or stressed about what your future holds. Stress can affect your mental health, so it's important to talk with your health care provider about your feelings and seek ways you can find help.

At home

Your family can provide much-needed support. Tell them what you know about your seizure disorder. Let them know they can ask you questions, and be open to conversations about their worries. Help them understand your condition by sharing any educational materials or other resources that your health care provider has given you.

At work

Meet with your supervisor and talk about your seizure disorder and how it affects you. Discuss what you need from your supervisor or co-workers if a seizure happens while at work. Consider talking with your co-workers about seizure disorders — you can widen your support system and bring about acceptance and understanding.

You're not alone

Remember, you don't have to go it alone. Reach out to family and friends. Ask your health care provider about local support groups or join an online support community. Don't be afraid to ask for help. Having a strong support system is important to living with any medical condition.

Source: http://www.mayoclinic.com

Risk factors

Risk factors for grand mal seizures include:

• A family history of seizure disorders
• Any injury to the brain from trauma, a stroke, previous infection and other causes
• Sleep deprivation
• Medical problems that affect electrolyte balance
• Illicit drug use
• Heavy alcohol use

Source: http://www.mayoclinic.com