Seizure

Seizure is a period of symptoms due to abnormally excessive or synchronous neuronal activity in the brain.
Seizure is a spectrum of different disease vary from
- Tonic-clonic seizure: Involuntary shaking movements involving much of the body with loss of consciousness
- Focal seizure: Shaking only parts of body with variable levels of consciousness
- Absence seizure: Subtle momentary loss of awareness

Mostly, these episodes last less than two minutes and it takes some time to return to normal.
Loss of bladder control may occur.

Seizures may be

Provoked: Due to Hypoglycemia, Hyponatremia, Alcohol withdrawal, Medication, Fever, Brain infection or Concussion.
Conditions that look like epileptic seizures but are not include: Fainting, Non-epileptic psychogenic seizure and Tremor.

One-third begin as generalized seizures from the start, affecting both hemispheres of the brain and impairing consciousness.
Two-thirds begin as focal seizures which may progress to generalized seizures.

Certain experiences, known as auras often precede focal seizures.
The seizures can include sensory (visual, hearing, or smell), psychic, autonomic, and motor phenomena depending on which part of the brain is involved.
Muscle jerks may start in a specific muscle group and spread to surrounding muscle groups in which case it is known as a Jacksonian march.
Automatisms

Tonic-clonic: They occur with a contraction of the limbs followed by their extension and arching of the back which lasts 10–30 seconds (the tonic phase). A cry may be heard due to contraction of the chest muscles, followed by a shaking of the limbs in unison (clonic phase).
Tonic: Constant contractions of muscles + Cyanosis due to stopped breathing
Clonic: Unison shaking of limbs
Myoclonic: Very brief spasms of muscles in either a few areas or all over, may cause the person to fall.
Absence / Focal seizure: Subtle with only a slight turn of head or eye blinking + Impaired consciousness
Atonic seizures: Losing muscle activity for greater than one second, typically occurring on both sides of the body.
Rarer seizure types: Involuntary unnatural laughter (Gelastic), crying (Dyscrastic), or more complex experiences such as déjà vu.
Reflex seizures: About 6% Seizures that are triggered by specific events
Sleep seizures: They happen more often during sleep or only when sleeping.

It is typically a period of recovery during which there is confusion, before a normal level of consciousness returns.
It usually lasts 3 -15 minutes but may last for hours.
Other common symptoms include Feeling tired, Headache, Difficulty speaking, and Abnormal behavior.
Psychosis is common (6–10%)
Often people do not remember what happened during this time.
Todd's paralysis (Localized weakness) may also occur after a focal seizure

Certain disorders occur more often in people with epilepsy, depending partly on the epilepsy syndrome present. These include

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