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Science 9 June 1967:
Vol. 156. no. 3780, pp. 1392 - 1393
DOI: 10.1126/science.156.3780.1392
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Articles

Oxygen Tension Changes Evoked in the Brain by Visual Stimulation

Karel J. Gijsbers 1 and Ronald Melzack 1

1 Department of Psychology, McGill University, Montreal, Canada

Localized changes in oxygen tension were recorded with platinum cathodes placed in the lateral geniculate nucleus in both anesthetized and awake cats. The amplitude of the responses increased with increasing stimulus intensity, but decreased with increasing flash rate. Both increases and decreases in cathode current were produced by steady illumination. The characteristics of the responses suggest that the responses reflect localized variations in blood flow, produced in turn by changes evoked in the tonic neural activity of the lateral geniculate nucleus.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Apparent diffusion time of oxygen from blood to tissue in rat cerebral cortex: implication for tissue oxygen dynamics during brain functions.
K. Masamoto, J. Kershaw, M. Ureshi, N. Takizawa, H. Kobayashi, K. Tanishita, and I. Kanno (2007)
J Appl Physiol 103, 1352-1358
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Separate Spatial Scales Determine Neural Activity-Dependent Changes in Tissue Oxygen within Central Visual Pathways.
J. K. Thompson, M. R. Peterson, and R. D. Freeman (2005)
J. Neurosci. 25, 9046-9058
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Activity-induced tissue oxygenation changes in rat cerebellar cortex: interplay of postsynaptic activation and blood flow.
N. Offenhauser, K. Thomsen, K. Caesar, and M. Lauritzen (2005)
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