Comprehensive Guide

Understanding Seizure Classifications

Seizures are categorized based on where they begin in the brain, a personâ€™s level of awareness, and whether movement is involved.

1. Focal Onset Seizures

Starting in one specific area or "network" on one side of the brain.

Focal Aware (Auras)

Awareness: Fully awake and alert.
Symptoms: Sudden emotional shifts, strange smells, or "dÃ©jÃ vu."
Physical: Muscle twitches or a "rising" stomach sensation.

Focal Impaired Awareness

Awareness: Confused, dazed, or unable to respond.
Symptoms: Repetitive movements like lip-smacking or fumbling.
Memory: Usually no memory of the event.

Focal to Bilateral Tonic-Clonic: When a seizure starts in one area and spreads to involve both sides of the brain.

2. Generalized Onset Seizures

Affecting both sides of the brain simultaneously.

Type	Characteristics
Absence	Brief "staring spells" (usually <10s).
Tonic	Muscles become tense/rigid; can cause falls.
Clonic	Rhythmic, jerking muscle movements.
Tonic-Clonic	Stiffening followed by jerking; loss of consciousness.
Myoclonic	Brief, shock-like jerks of a muscle group.
Atonic	"Drop attacks"â€”muscles suddenly lose all tone.

3. Unknown Onset Seizures

Used when the beginning is not known or witnessed, such as during sleep or while alone. These may include motor (movement) or non-motor (behavior arrest) features.

Febrile Seizures

Triggered by high fevers in children (6 months to 5 years). Most children outgrow these.

Infantile Spasms

Sudden jerking followed by stiffening in infants, typically occurring in clusters.

Symptom Documentation Guide

Motor: Jerking, limpness, tenseness, brief twitches, or automatisms.

Non-Motor: Changes in sensation, emotions, thinking, or autonomic functions.

Key Factors

Where it begins
Level of Awareness
Movement Involvement

Understanding Epilepsy