Subject(s)
Chelating Agents/therapeutic use , Hepatolenticular Degeneration/complications , Movement Disorders/etiology , Penicillamine/therapeutic use , Stereotyped Behavior , Adult , Basal Ganglia/pathology , Female , Foot , Hepatolenticular Degeneration/drug therapy , Hepatolenticular Degeneration/pathology , Hepatolenticular Degeneration/physiopathology , Humans , Magnetic Resonance Imaging , Movement Disorders/drug therapy , Movement Disorders/pathology , Movement Disorders/physiopathology , Stereotyped Behavior/drug effectsABSTRACT
In this study we relate our experience in 7 cases of photosensitive epilepsy and the effect of different types of filters upon the photoconvulsive response (PR). The study was performed with an 8 channels electroencephalograph and the patients were stimulated with a Joule lamp (1 c/sec-30 c/sec). Red, yellow, blue and green cellophane paper filters were used. The EEG response presented bilateral spikes or polyspikes and slow wave paroxysmal discharges. In the presence of a blue filter, the PR appeared later: an average of 6 seconds of closing the eyes and the response had a lower amplitude. In addition the PR did not appear or it was blocked when we used a double blue filter. These results support the role of the retina in the genesis of the PR. We suggest that the blue filter allows a small percentage of light transmission and under these conditions the electrical events that follow light stimulation do not occur.
Subject(s)
Color , Epilepsy/etiology , Photic Stimulation/adverse effects , Adolescent , Adult , Child , Electroencephalography , Epilepsy/physiopathology , Female , Filtration/instrumentation , HumansABSTRACT
In this study we relate our experience in 7 cases of photosensitive epilepsy and the effect of different types of filters upon the photoconvulsive response (PR). The study was performed with an 8 channels electroencephalograph and the patients were stimulated with a Joule lamp (1 c/sec-30 c/sec). Red, yellow, blue and green cellophane paper filters were used. The EEG response presented bilateral spikes or polyspiks and slow wave paroxystic discharges. In the presence of a blue filter, the PR appeared later: an average of 6 seconds of closing the eyes and the response had a lower amplitude. In addition the PR did not appear or it was blocked when we used a double blue filter. These results support the role of the retina in the genesis of the PR. We suggest that the blue filter allows a small percentage of light transmission and under these conditions the electrical events that follow light stimulation do not occur
Subject(s)
Adolescent , Adult , Humans , Female , Color , Epilepsy/etiology , Photic Stimulation/adverse effects , Electroencephalography , Filtration/instrumentationABSTRACT
In this study we relate our experience in 7 cases of photosensitive epilepsy and the effect of different types of filters upon the photoconvulsive response (PR). The study was performed with an 8 channels electroencephalograph and the patients were stimulated with a Joule lamp (1 c/sec-30 c/sec). Red, yellow, blue and green cellophane paper filters were used. The EEG response presented bilateral spikes or polyspiks and slow wave paroxystic discharges. In the presence of a blue filter, the PR appeared later: an average of 6 seconds of closing the eyes and the response had a lower amplitude. In addition the PR did not appear or it was blocked when we used a double blue filter. These results support the role of the retina in the genesis of the PR. We suggest that the blue filter allows a small percentage of light transmission and under these conditions the electrical events that follow light stimulation do not occur (AU)
Subject(s)
Adolescent , Adult , Humans , Female , Epilepsy/etiology , Photic Stimulation/adverse effects , Color , Filtration/instrumentation , ElectroencephalographyABSTRACT
In this study we relate our experience in 7 cases of photosensitive epilepsy and the effect of different types of filters upon the photoconvulsive response (PR). The study was performed with an 8 channels electroencephalograph and the patients were stimulated with a Joule lamp (1 c/sec-30 c/sec). Red, yellow, blue and green cellophane paper filters were used. The EEG response presented bilateral spikes or polyspikes and slow wave paroxysmal discharges. In the presence of a blue filter, the PR appeared later: an average of 6 seconds of closing the eyes and the response had a lower amplitude. In addition the PR did not appear or it was blocked when we used a double blue filter. These results support the role of the retina in the genesis of the PR. We suggest that the blue filter allows a small percentage of light transmission and under these conditions the electrical events that follow light stimulation do not occur.
ABSTRACT
This is a report of a 21-year-old woman with reading epilepsy. Clinical and electroencephalographic (EEG) observations are presented while the patient read a news magazine in Spanish, read a magazine in English, read an announcement repetitively, viewed comic strips without legends, made a mathematical calculation. Only reading in Spanish produced clinical and EEG paroxysms. This case report supports the "communication" hypothesis as opposed to hypotheses that emphasize proprioceptive and other "lower order" stimuli in evoking seizures while reading.
