[Response of active microvascular segments in the pial artery system to photostimulation of the ey in the rabbit].
Photomicrography revealed the dynamics of pial ertarial responses, their active segments in particular: the sphincters at offshoots of minor arteries from the larger vessels, and the precortical arteries. On retinal photostimulation, the precortical arteries were found to dilate quite often (72%); the sphincters at offshoots in 50%, and the minor arteries in 38% of cases, while the larger pial arteries showed no dilatation at all. The dilatation was most pronounced in the precortical arteries and in the sphincter areas (25% of the control diameter), and less significant in minor pial arteries (10%). The data obtained indicate that the precortical arteries are the basic vascular effectors of regulation of adequate microcirculation in the cerebral cortex.
D G
DG
Baramidze
Z T
ZT
Gordeladze
Iu I
IuI
Levkovich
D000818:Animals; D001158:Arteries / Q000502:physiology; D002540:Cerebral Cortex / Q000098:blood supply*; D005260:Female; D008297:Male; D008833:Microcirculation / Q000502:physiology; D010841:Pia Mater / Q000098:blood supply*; D011817:Rabbits; D014664:Vasodilation; D014796:Visual Perception / Q000502:physiology*
Reaktsiia aktivnykh mikrososudistykh segmentov v sisteme pial'nykh arteriĭ pri fotostimuliatsii glaza u krolikov.