[The imaging and electrophysiological correlations in lateral homonymous hemianopsia of vascular origin].
This paper presents 7 cases of patients suffering of lateral homonymous hemianopia. This diagnosis was established taking into account both the clinical exam as well as the visual field, into the context of a vascular suffering of hemiparesis type. I worked with a Bioscript BST 2100 apparatus foreseen with flash and with its help there could have been recorded the visual evoked potentials (VEPs) with electrodes occipitally placed. The analysis of VEPs was made in the correlations with the premises and the extend of the cerebral lesion. The imaging exploration stood out lesions with the following localisations: stretched hemispherically, internal capsule, thalamus, occipitally. The VEPs recordings showed: the small N1 + leveling, the leveling of the whole tract, bifid N1 + leveling, invertit N1 + leveling, diminished N1. The study of the correlation between the lesion premises and the aspect of VEPs led to the idea that waves N1 and P1 represent different functions of the process of the visual stimulations rather than activities in distinct cortical areas.
Baltag
D
D
Facultatea de Medicină, Universitatea de Medicină şi Farmacie Gr. T. Popa, Iaşi.
Găleşanu
M R
MR
D000368:Aged; D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology; D002545:Brain Ischemia / Q000150:complications; D002543:Cerebral Hemorrhage / Q000150:complications; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006423:Hemianopsia / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010775:Photic Stimulation; D014057:Tomography, X-Ray Computed