[Electron microscopy and hystology of the third ventricle ependyma of rat's brain after repeated simulation of the effects of microgravity].
Scanning electron and light microscopy were applied to study the third ventricle ependyma in rat's brain after 30-d tail-suspension, 30-d readaptation to the horizontal position, and repeated 14-d suspension in parallel with another group of rats exposed to a single 14-d suspension. Despite the repeated blood redistribution toward the head, the second tail-suspension produced significantly less grave destruction of the ependymal cell structure and cilia ultrastructure than the single 14-d or previous 30-d one, which suggests that simulation of microgravity repeated after substantial delay imparts much more persistence to the cerebrospinal fluid outflow from the brain ventricles into the saggital sinus.
Sidorenko
L A
LA
Krasnov
I B
IB
Gulevskaia
T S
TS
Morgunov
V A
VA
D000818:Animals; D004805:Ependyma / Q000648:ultrastructure*; D005500:Follow-Up Studies; D019417:Hindlimb Suspension; D008297:Male; D008854:Microscopy, Electron; D051381:Rats; D017208:Rats, Wistar; D014893:Weightlessness / Q000009:adverse effects*