Topography of capillary density, glucose metabolism, and microvascular function within the rat inferior colliculus
| Autor: | Joseph D. Fenstermacher, Nadine M. Sposito, Susan E. Pettersen, Paul M. Gross, Diane G. Panton |
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| Rok vydání: | 1987 |
| Předmět: |
Inferior colliculus
Male Capillary action Microcirculation Blood volume Stereology Rats Inbred Strains Blood flow Anatomy Biology Inferior Colliculi Capillaries Rats Midbrain medicine.anatomical_structure Glucose nervous system Neurology Neuropil medicine Biophysics Animals Neurology (clinical) Cardiology and Cardiovascular Medicine Nucleus |
| Zdroj: | Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. 7(2) |
| ISSN: | 0271-678X |
| Popis: | A midbrain nucleus of the auditory system, the inferior colliculus, was used as a model for analyzing spatial correlations or “coupling” among capillary density, tissue glucose metabolism, and several measures of microvascular function in the rat. The capillary bed of the inferior colliculus was examined with stereological techniques, and physiological measures were obtained with radioactive tracers, quantitative autoradiography, and image processing. Within the colliculus, capillary density, volume fraction, length, and surface area were highest in the central nucleus where the packing densities of neuropil and perikarya are greatest. Rates of glucose metabolism and blood flow correlated closely with capillary density in a 3 × 2 matrix of collicular subregions in the sagittal and coronal planes. The strength of this correlation suggests that estimates of capillary density can be made from measurements of tissue glucose metabolism within this structure under normal conditions. Microvascular blood volume and transcapillary flux of a neutral amino acid, α-aminoisobutyric acid, were homogeneous throughout the colliculus. The studies demonstrate quantitatively in a single brain nucleus a close correspondence between cytoarchitecture, richness of the capillary bed, and complexity of neural activity (inferred from local measures of glucose metabolism and blood flow). Such relationships were suggested by Craigie 67 years ago. |
| Databáze: | OpenAIRE |
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