Fotokonvulsivreaktion und Fotomyoklonus: Altersabhängige Genetisch Determinierte Varianten der Gesteigerten Fotosensibilität1

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Abstract
The frequency of photomyoclonic (PMC) and photoconvulsive (PCR) reactions is compared in relatives (parents and siblings) of patients with petit mal absences (control group) and of patients with PCR respectively. Both types of enhanced photosensitivity occur more frequent in relatives of patients with PCR than in the control group. This means that PCR and PMC are genetically independent from centrencephalic epilepsy. The incidence of PCR decreases with age while the incidence of PMC increases. If all the relatives are divided into 4 respectively 7 groups of age the relative frequencies of both reactions in each group may be added to an average value which does not differ statistically from the mean incidence of enhanced photosensitivity in the whole population of the relatives. This means that in each group of age the relative incidences of PMC and PCR behave as complements of the average mean value of increased photosensitivity. The conclusion is that PMC and PCR are age dependent variations of genetically determined increased photosensitivity. Die Häufigkeit der fotomyoklonischen und der fotokonvulsiven Reaktion bei Verwandten von Patienten mit Absencen und bei Verwandten von Patienten mit Fotokonvulsivreaktion wird verglichen.