The relationship between photosensitive temporal lobe epilepsy and eye closure activity.
We describe a 16-year-old female patient affected by photo-induced temporal lobe epilepsy. During intermittent photic stimulation she showed a photoparoxysmal response in the EEG. This case was diagnosed from clinical symptoms, single photon emission computer tomography, and EEG data. The clinical symptoms were relieved by the administration of carbamazepine. As these photoparoxysmal responses were observed not only during photic stimulation, but also when patient was closing her eyes during an eye-opening test in complete darkness, we propose the existence of an alternative pathway such as from the extraocular muscles or orbicularis oculi, or activation of cortical activity due to the change of consciousness by closing eyes in inducing photosensitive epilepsy. We describe an additional case and discuss a novel aspect of photo-induced temporal lobe epilepsy.
Third Department of Internal Medicine, Hiroshima University School of Medicine 1-2-3 Kasumi Minami-ku, Hiroshima 734 Japan.
K
K
Inoue
Y
Y
Mimori
T
T
Harada
T
T
Oshita
R
R
Kumagai
S
S
Nakamura
D000293:Adolescent; D000927:Anticonvulsants / Q000627:therapeutic use; D001767:Blinking; D001921:Brain / Q000000981:diagnostic imaging / Q000503:physiopathology*; D002220:Carbamazepine / Q000627:therapeutic use; D004569:Electroencephalography; D020195:Epilepsy, Reflex / Q000188:drug therapy / Q000503:physiopathology*; D004833:Epilepsy, Temporal Lobe / Q000188:drug therapy / Q000209:etiology* / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008959:Models, Neurological; D009415:Nerve Net / Q000503:physiopathology; D009778:Occipital Lobe / Q000503:physiopathology; D013702:Temporal Lobe / Q000503:physiopathology; D015899:Tomography, Emission-Computed, Single-Photon; D016896:Treatment Outcome
D000927:Anticonvulsants; D002220:Carbamazepine