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  • Title: [Changes in cerebral circulation function during head down bed rest for 7 days].
    Author: Wang D, Xiang Q, Shen X, Yan H, Dong Q.
    Journal: Space Med Med Eng (Beijing); 1998 Aug; 11(4):273-6. PubMed ID: 11543245.
    Abstract:
    To further understand the effects and regulation of brain circulation before, during and after short-term -6 degrees head down bed rest (HDT), 6 healthy young men aged 19-21 years, were subjected to HDT for 7 d. Cerebral blood flow velocity in the middle cerebral arteries of both sides was measured with a TC2000TCD instrument in 6 young adults before, during, and after 7d HDT. The results showed that cerebral blood flow velocity in the middle cerebral arteries increased throughout HDT, the increase was obvious in 24 h. They reached the highest value at the 4th hour and the lowest value on the 5 th day, and then, there were a tendency to rise on the 6th day and 7th day. The changes were about the same on both sides.
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