Photoparoxysmal response

A photoparoxysmal reaction (PPR; also photoparoxysmal reaction , formerly photoconvulsive reaction ) is a paroxysmal change in the electroencephalogram (EEG) triggered by light stimuli (photosensitivity ) up to the triggering of an epileptic attack (photogenic reflex attack ).

The occurrence depends on age (especially between the ages of 5 and 18), gender (girls or women significantly more often than boys or men), the type of epilepsy (especially idiopathic generalized epilepsy) and any drug-related epilepsy Treatment. Photoparoxysmal reactions also occur in healthy people and in other diseases such as B. a migraine .

Severity of the EEG changes under flicker light stimulation
(according to Waltz, Christen and Doose):

Degree	EEG changes
1	Spikes within occipital background activity
2	parietal occipital spikes with biphasic slow wave
3	Parietal occipital spikes with biphasic slow wave and spreading to the front
4th	generalized spike wave activity or poly spike wave activity

literature

• Ronald Schmid: Clinical Electroencephalography of Childhood and Adolescence: An Atlas of EEG Activity: Age-Related Norm Curves and Pathology . Springer Berlin, Heidelberg, 1995, ISBN 978-3-642-79304-2 , OCLC 913698953 . Pp. 107-108, preview Google Books .
• Walter Fröscher: The epilepsies: basics, clinic, treatment. Schattauer Verlag, Stuttgart 2004, p. 344, ISBN 3-7945-2131-5 .

Individual evidence

1. ^ S. Waltz, HJ Christen, H. Doose: The different patterns of the photoparoxysmal response - a genetic study. In: Electroencephalography and clinical neurophysiology. Volume 83, Number 2, August 1992, pp. 138-145, PMID 1378379 .

This article is about a health issue. It is not used for self-diagnosis and does not replace a diagnosis by a doctor. Please note the information on health issues !