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  • Title: [Structural changes in the soleus muscle of rats on the Kosmos-series biosatellites and in hypokinesia].
    Author: Il'ina-Kakueva EI, Portugalov VV.
    Journal: Kosm Biol Aviakosm Med; 1981; 15(3):37-40. PubMed ID: 7289542.
    Abstract:
    Structural changes in the soleus muscle of rats used in flight and synchronous experiments of the Cosmos program and hypokinetic studies have been investigated. It is hypothesized that focal edema and dystrophic changes observed in flight, synchronous and hypokinetic rats can be caused by circulation disorders of different etiology. In flight and synchronous rats they develop two days postflight due to the deconditioning of the muscle tissue and intraorgan vascular system which fail to meet the requirements after transition from 0 g to 1 g. In hypokinetic rats circulation disorders occur on the first experimental day due to mechanical causes (paws are pressed against the cage floor impeding venous outflow) and muscle pump deficiency. In all cases circulation disorders seem to be associated with peculiar features of angioarchitectonics of the soleus muscle.
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