TL;DR: Focal seizures cause localized twitching and usually require a veterinary visit within 24 to 48 hours, though episodes lasting over five minutes or occurring in clusters are life-threatening emergencies.
What are the symptoms and signs of a focal seizure in my cat?
A focal seizure, often called a partial seizure, occurs when abnormal electrical activity happens in a specific, localized area of a cat's brain. Unlike a generalized seizure where the whole body stiffens or shakes, a focal seizure may manifest as rhythmic twitching or pulsing in just one leg, an ear, or a side of the face. While your cat may remain conscious, they might appear dazed or confused during the episode.
When is my cat's focal seizure considered a veterinary emergency?
- Schedule a veterinary appointment within 24 to 48 hours for a single focal seizure episode.
- Seek emergency veterinary care immediately if the localized twitching lasts longer than five minutes (status epilepticus).
- Seek emergency veterinary care immediately if your cat has more than two seizures in a 24-hour period (cluster seizures).
How does recording a video of my cat's seizure help the veterinarian?
- Capture a clear video of the twitching to show the veterinarian the exact pattern of the movement.
- Use the recording to document your cat's level of consciousness and the total duration of the event.
- Provide visual evidence to help the vet distinguish between a neurological seizure, a musculoskeletal tremor, or a behavioral tic.
- Ensure your cat receives the correct diagnostic path and treatment plan more quickly.
Clinical Context (Merck Veterinary Manual)
Levetiracetam is a pyrrolidine-based anticonvulsant with an unknown mechanism of action that can be used as an adjunctive anticonvulsant or occasionally as monotherapy in cats at a dosage of 10-20 mg/kg, PO, tid. Few adverse effects such as ataxia, sedation, and vomiting have been reported at routine dosages. Diazepam at 0.5-1 mg/kg, PO, bid, may be used in cats with uncontrolled seizures, however, it has been associated with fatal hepatic necrosis in some reports, warranting close monitoring during the first few weeks of therapy. Phenobarbital is often the anticonvulsant of choice in cats, with levetiracetam added if seizures are not well controlled.
Chapter: Neurology, Pharmacology
Source: The Merck Veterinary Manual, 11th Edition (Page 2598)