PMID: 9529819Apr 8, 1998Paper

Quantitative analysis of hemispatial neglect in the intracarotid sodium amobarbital (ISA) test

Journal of the International Neuropsychological Society : JINS
G L AhernM E Weinand

Abstract

There are dramatic changes in the electroencephalogram of the inactivated hemisphere in the intracarotid sodium amobarbital test. One of the more profound behavioral changes during this procedure is left hemispatial neglect accompanying right hemisphere inactivation. The present study was designed to ascertain whether there was a clear relationship between the degree of hemispheric inactivation (as measured by the electroencephalogram) and the degree of left hemispatial neglect during this procedure. Sixty-nine participants undergoing right hemisphere intracarotid sodium amobarbital testing were presented with a random letter cancellation test at various points during the procedure. Neglect was quantified as significant, moderate, minimal, or none, based on how many target letters the patients missed. The simultaneous electroencephalogram from each of these testing points was spectrally analyzed and topographic maps were generated. The degree of neglect was then compared with the comparable topographic map. It was found that as the amobarbital-induced right hemispheric dysfunction regressed, the degree of neglect lessened in a systematic fashion, as did the profound electroencephalographic changes induced by the drug. Thus, the...Continue Reading

Citations

Jan 21, 2012·Journal of Clinical and Experimental Neuropsychology·Farrell S LeibovitchSandra E Black
Jan 26, 2006·Neuropsychologia·Adam J WoodsHeather Murphy
Jan 24, 2004·Journal of the International Neuropsychological Society : JINS·John C AdairKenneth M Heilman

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