Tohoku J. Exp. Med., 1997, 181 (2)

Wavelength Dependency of Photoparoxysmal Responses in Photosensitive Nonepileptic Subjects

YUKITOSHI TAKAHASHI, TATEKI FUJIWARA, KAZUICHI YAGI and MASAKAZU SEINO

National Epilepsy Center, Shizuoka Higashi Hospital, Shizuoka 420

  • Using specially made optical filters, we analyzed the wavelength dependency of photoparoxysmal responses (PPRs) in five photosensitive nonepileptic subjects. The wavelength spectrum around 700 nm (680-700 nm) was estimated as the only visible spectrum essential for eliciting PPRs in two normal trichromat nonepileptic subjects, although the effect of some wavelength spectra (360-400 nm and 520-580 nm) was uncertain. The wavelength dependency of PPRs in two photosensitive nonepileptic subjects was the same as that found in some patients with photosensitive idiopathic generalized epilepsy.
    Key words--- photoparoxysmal response; wavelength dependency; predisposition; idiopathic generalized epilepsy

    Tohoku J. Exp. Med., 1997, 181, 311-319
    Address for reprints: Dr. Yukitoshi Takahashi, Department of Pediatrics; Gifu University School of Medicine, 40 Tsukasa-machi, Gifu 500, Japan.

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