[Cerebral cortical blood flow during parabolic maneuvers].
Cerebral cortical blood flow (CBF) was measured in 6 rabbits during parabolic flight maneuvers (20 s of weightlessness).  During the first seconds of weightlessness, CBF increased up to 100% when compared with CBF at 1 G.  Since this transient increase (5 s) was not modified when propranolol or pentobarbital was given to the animals, one can hypothesize that it was not related to stress.
Florence
G
G
Bonnier
R
R
Lemenn
M
M
Desert
S
S
Charbonne
R
R
Seylaz
J
J
D000818:Animals; D000959:Antihypertensive Agents / Q000494:pharmacology; D002540:Cerebral Cortex / Q000098:blood supply* / Q000502:physiology; D002560:Cerebrovascular Circulation / Q000187:drug effects*; D018471:Hypergravity; D006993:Hypnotics and Sedatives / Q000494:pharmacology; D008297:Male; D010424:Pentobarbital / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D011817:Rabbits; D013026:Space Flight; D014893:Weightlessness
D000959:Antihypertensive Agents; D006993:Hypnotics and Sedatives; D011433:Propranolol; D010424:Pentobarbital