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  • Title: Changes in the visual evoked potential to pattern reversal with lithium medication.
    Author: Fenwick PB, Robertson R.
    Journal: Electroencephalogr Clin Neurophysiol; 1983 May; 55(5):538-45. PubMed ID: 6187547.
    Abstract:
    Previous reports in the literature have suggested that lithium medication does not affect the VEP to flash stimulation. It was predicted that this would not be true for pattern reversal stimulation. Seven patients had their pattern evoked potential measured using a 42' check to fractional pattern displacement of 1/4, 1/2, 3/4 and full square. The VEP was measured before, 1 week after and 5 weeks after the commencement of lithium medication. The results show that there is a significant increase in both the N65-P95 and P95-N125 amplitudes when the 'before lithium' sessions are compared to 'after lithium.' Seven normal subjects matched for the age and sex of the patient group were tested twice, once as a 'control' and a further 5 weeks after this. No significant differences were found in the 'control' sessions between patient and normal groups although a significant difference in both the N65-P95 and P95-N125 amplitude after the treatment of the patient group with lithium was found.
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