What are the EEG changes characteristic of occipital lobe epilepsy?

Updated: Oct 01, 2020
  • Author: Raj D Sheth, MD; Chief Editor: Selim R Benbadis, MD  more...
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Answer

Answer

Occipital lobe seizures represent about 5%–10% of focal epilepsies. They may be photo-responsive. Interictally, there may be asymmetric occipital slow waves or spikes or multi-spikes. Ictally, there may show paroxysmal fast activity (PFA) and/or fast spiking, which may spread anteriorly.

Electroencephalogram demonstrates bilateral repeti Electroencephalogram demonstrates bilateral repetitive occipital sharp waves ~1Hz frequency.
Electroencephalogram of a right occipital lobe sei Electroencephalogram of a right occipital lobe seizure (beginning); 4-5 Hz repetitive sharp waves (maximal T6/O2).
Electroencephalogram of a right occipital lobe sei Electroencephalogram of a right occipital lobe seizure (middle); repetitive sharp waves evolve to rhythmic theta in the right occipital region.
Electroencephalogram of a right occipital lobe sei Electroencephalogram of a right occipital lobe seizure (end); obscured by EMG artifact.

For more information, see Partial Epilepsies.


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