Understanding Seizures: Types, Symptoms, and What to Do

What Exactly is a Seizure?

Imagine your brain as a busy city with billions of nerve cells, called neurons, constantly communicating. They send messages to your body through electrical signals, like tiny messengers zipping around. Normally, this communication is orderly and controlled. However, a seizure happens when there's a sudden, intense surge of disorganized electrical activity in the brain. This electrical storm can temporarily disrupt normal brain function, leading to a wide range of physical and behavioral changes. It’s important to remember that not everyone who has a seizure has epilepsy, a condition defined by recurrent seizures. Some individuals might experience a seizure just once in their lifetime due to a temporary trigger.

Classifying Seizures: Focal vs. Generalized

Doctors classify seizures based on where they start in the brain. The two main categories are:

Focal Seizures (Previously Partial Seizures)

These seizures begin in one specific area or on one side of the brain. They are quite common, with about 60% of people diagnosed with epilepsy experiencing them. Focal seizures can further be divided:

• Focal Aware Seizures (Simple Partial Seizures): During these seizures, you remain fully conscious and aware of yourself and your surroundings. You might notice unusual sensations, emotions, or muscle twitches. For instance, someone might suddenly smell an odd odour or feel a strange tingling in their arm, all while knowing what’s happening.
• Focal Impaired Awareness Seizures (Complex Partial Seizures): Here, consciousness is affected – either partially or completely lost. You might appear awake but won’t be aware of your surroundings or what’s happening. This can involve repetitive, involuntary actions like lip-smacking, picking at clothes, or wandering aimlessly. You might not remember the event afterwards.
• Focal to Bilateral Tonic-Clonic Seizures (Secondary Generalized Seizures): This type starts as a focal seizure but then spreads to involve both sides of the brain, leading to a generalized seizure. It often begins with symptoms of a focal impaired awareness seizure and then progresses to widespread body stiffening (tonic phase) followed by rhythmic jerking movements (clonic phase).

Generalized Seizures

These seizures involve both sides of the brain from the very beginning. Sometimes, a focal seizure can spread and become generalized.

• Generalized Tonic-Clonic Seizures (GTC): This is the type most people picture when they think of seizures. It involves a dramatic loss of consciousness, followed by a stiffening of the body (tonic phase) and then rhythmic jerking of the limbs (clonic phase). These seizures can last anywhere from 1 to 3 minutes. Afterwards, the person often feels very sleepy and confused.
• Absence Seizures (Petit Mal): These are characterized by brief periods of blank staring, sometimes accompanied by eyelid fluttering or slight hand movements. They are more common in children. There are two types:
  • Typical Absence Seizures: These are very brief, often lasting less than 10 seconds. The person seems to suddenly 'zone out' and then quickly returns to normal, often unaware anything happened.
  • Atypical Absence Seizures: These develop more slowly and can last 20 seconds or longer. They might include more noticeable eye blinking or hand gestures and are often associated with certain epilepsy syndromes.
• Tonic Seizures: These involve a sudden stiffening of the muscles, often affecting the back, legs, and arms. They can cause a person to fall suddenly if they are standing.
• Clonic Seizures: Characterized by repeated jerking movements of muscles, typically in the arms and face.
• Myoclonic Seizures: These involve sudden, brief muscle twitches or jerks, often affecting the arms or legs. They can happen just once or multiple times over a short period.
• Atonic Seizures (Drop Attacks): These seizures cause a sudden loss of muscle tone, leading to the person collapsing or dropping suddenly. They are very brief, usually lasting only a few seconds.
• Epileptic Spasms: These involve sudden, brief extensions or flexions of the arms, legs, or head. They are most common in infants younger than 2 years old and are sometimes referred to as infantile spasms.

Symptoms: What to Look For

Seizure symptoms vary greatly depending on the type and the part of the brain affected. While some seizures involve dramatic shaking, others can be very subtle.

Common signs might include:

• Sudden, unexplained feelings of déjà vu, fear, or pleasure
• Uncontrollable jerking or shaking of limbs
• Stiffening of the body
• Periods of staring blankly
• Confused or unusual behaviour
• Sudden falls
• Loss of consciousness
• Unusual sensations (smells, tastes, tingling)
• Repetitive, purposeless movements (automatisms)

It’s important to note that sometimes it can be very difficult to recognize that a seizure is happening, especially if the symptoms are subtle.

What Causes Seizures?

Seizures can be triggered by various factors. While epilepsy is a common cause of recurrent seizures, other reasons include:

• Brain injury: Such as from a head trauma.
• Stroke: Disruption of blood flow to the brain.
• Brain infections: Like meningitis or encephalitis.
• Brain tumors.
• Genetic factors: Some epilepsy syndromes are inherited.
• High fever: Particularly in young children (febrile seizures).
• Low blood sugar (hypoglycemia).
• Certain medications or drug withdrawal.
• Electrolyte imbalances.

What to Do During a Seizure: First Aid Steps

If you witness someone having a seizure, your calm and quick response can make a significant difference. Here’s what to do:

1. Ensure Safety: Gently guide the person to the floor to prevent injury from falling. Clear the area around them of any hard or sharp objects. If they are in bed, put pillows around them.
2. Turn Them on Their Side: Once the jerking stops, carefully turn the person onto their side. This helps keep their airway clear and prevents them from choking if they vomit.
3. Loosen Tight Clothing: Gently loosen any tight clothing around their neck.
4. Do NOT Put Anything in Their Mouth: Resist the urge to place anything in their mouth, such as a spoon or your fingers. This can cause serious injury to their teeth, jaw, or tongue, and does not prevent them from swallowing their tongue.
5. Time the Seizure: Note the time the seizure starts and how long it lasts. This information is vital for medical professionals.
6. Stay With Them: Remain with the person until the seizure ends and they are fully alert.

When to Seek Emergency Medical Help

Call for emergency medical help (like 108 or 112 in India) immediately if:

• The seizure lasts longer than 3 minutes.
• The person has trouble breathing or appears to choke after the seizure.
• The person has another seizure immediately after the first one.
• The seizure occurred in water.
• The person injures themselves during the seizure.
• You know the person has epilepsy and this is an unusual seizure for them.
• The person does not regain consciousness or seem to return to their normal state after the seizure.

Diagnosis and Treatment

Diagnosing the type of seizure involves a thorough medical history, a physical and neurological examination, and often diagnostic tests. These tests might include an electroencephalogram (EEG) to record brain activity, an MRI or CT scan to get images of the brain, and blood tests to check for underlying causes.

Treatment aims to control seizures and improve quality of life. The most common treatment is medication, with various anti-seizure drugs available. If medications aren't effective, other options like surgery (removing the part of the brain causing seizures), vagus nerve stimulation, or dietary changes (like the ketogenic diet) might be considered.

Living with Seizures

Managing seizures effectively often involves a combination of medical treatment, lifestyle adjustments, and understanding from family and friends. Regular follow-ups with your doctor are essential to monitor treatment effectiveness and adjust medications as needed. Education about seizure triggers and seizure first aid for family and caregivers is also incredibly important.

Frequently Asked Questions (FAQ)

Q1: Can a seizure be caused by stress?

Yes, stress can be a trigger for seizures in some individuals, particularly those with epilepsy. Managing stress through relaxation techniques, adequate sleep, and a balanced lifestyle can be beneficial.

Q2: Is it possible to swallow your tongue during a seizure?

No, this is a common myth. Your tongue is attached to the floor of your mouth and cannot be swallowed. Trying to put something in the mouth during a seizure can cause serious harm.

Q3: How long does a typical seizure last?

Seizure duration varies greatly. Absence seizures can be very brief, lasting only a few seconds, while generalized tonic-clonic seizures can last 1 to 3 minutes. Any seizure lasting longer than 3 minutes requires immediate emergency medical attention.