May 24, 2023 · Tonic seizures are characterized by sudden muscle stiffness in your limbs or torso. They can occur when you’re awake or asleep and usually last less than a minute.

Muscle "tone" is the muscle's normal tension at rest. In a tonic seizure, the tone is greatly increased: the body, arms, or legs become suddenly stiff or tense. A person may be aware or …

A seizure that originates in both halves (hemispheres) of the brain simultaneously, causing stiffness or twitching throughout the body, is known as a generalized tonic or clonic seizure.

How can someone help me during a tonic seizure? Our short online first aid course shows you what tonic seizures can look like, and how to help when someone has one.

Jun 30, 2024 · A generalized tonic seizure involves bilaterally increased tone of the limbs typically lasting 3 seconds to minutes. They often occur out of sleep, can occur in a series through the …

Oct 27, 2022 · During a tonic seizure, a person’s muscles suddenly stiffen or become tense. Learn about the symptoms, when they occur, their causes, and treatments.

Tonic seizures are characterized by facial and truncal muscle spasms, flexion or extension of the upper and lower extremities, and impaired consciousness. Several types of tonic seizures …

Feb 1, 2025 · A tonic-clonic seizure, previously known as a grand mal seizure, causes a loss of consciousness and violent muscle contractions. It's the type of seizure most people picture …

Jun 6, 2023 · Tonic seizures cause sudden stiffness and rigidity in your muscles. They typically last less than 1 minute. Seizures are rapid bursts of electrical activity in your brain that can …

Nov 5, 2025 · Tonic in the context of epilepsy refers to a specific type of seizure characterized by sudden muscle stiffening, often affecting the limbs, trunk, or both. During a tonic seizure, the …