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Regional Cerebral Blood Flow Correlates of Auditory Processing
David S. Knopman, MD;
Alan B. Rubens, MD;
Arthur C. Klassen, MD;
Maurice W. Meyer, DDS, PhD
Arch Neurol. 1982;39(8):487-493.
Abstract
• To study the regional cerebral blood flow (rCBF) correlates of auditory processing, we performed rCBF measurements in young, normal right-handed volunteers engaged in listening tasks. Using the xenon Xe 133 inhalation technique, rCBF was measured in 11 regions in each hemisphere. Compared with a baseline condition, significant rCBF increases in the left posterior Sylvian regions were associated with both verbal phonologic processing and nonverbal acoustic processing. Verbal semantic processing was associated with unilateral increased rCBF in the posterior Sylvian region contralateral to the hand used for response signaling. Comparison of rCBF from homologous regions of the two hemispheres also confirmed a clear difference between the rhyme detection and meaning detection tasks, with the former strongly lateralized to the left hemisphere. Thus, changes in rCBF were related to the nature of the listening task.
Author Affiliations
From the Departments of Neurology, University of Minnesota (Drs Knopman, Klassen, and Meyer) and Hennepin County Medical Center (Dr Rubens), Minneapolis.
Footnotes
Accepted for publication Nov 18, 1981.
Read in part before the ninth annual meeting of the International Neuropsychological Society, Atlanta, Feb 6, 1981.
Reprint requests to Department of Neurology, University of Minnesota Hospitals, Minneapolis, MN 55455 (Dr Knopman).
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