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Photic and Bemegride Activation of Triphasic Waves in Portal‐Systemic Encephalopathy

1971; Wiley; Volume: 25; Issue: 3 Linguagem: Inglês

10.1111/j.1440-1819.1971.tb01501.x

1440-1819

Takuya Kojima, Matué Miyasaka, H Moriya, H Fukuzawa, Y Shimazono,

Neuroscience and Neuropharmacology Research

Summary Photic stimulation from 0.5 to 20cps flickers was given on 7 cases of portal‐systemic encephalopathy. The triphasic waves were increased by the stimulation (mostly appearing synchronously with 2.0–3.5 cps of flicker) in all cases at least more than once in repeated EEG examinations. Bemegride activation was performed on three cases who had theta and alpha background activity with very poor delta waves. The triphasic waves increased in number remarkably in two cases and poorly in one. Based on these reactions to the photic stimulation and bemegride activation, it was suggested that the triphasic waves and epileptic discharges might have some similar mechanism in their production. (This study was presented at 18th annual meeting of Japan EEG Society, 1969