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Anemia and Hyperemia of the Brain 

Anemia and Hyperemia of the Brain
Chapter:
Anemia and Hyperemia of the Brain
Author(s):

Marcus E. Raichle

DOI:
10.1093/med/9780199358984.003.0013
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date: 05 April 2020

This chapter goes over the anemia and hyperemia of the brain. The brain is the "servant of the metabolic substrate." This is demonstrated in an experiment on Bertino that involved compressing his carotids until he experienced a convulsion and briefly lost consciousness. During this time, the pulse rate diminished and the brain pulse became very small. After the convulsion, the brain volume increased dramatically. Catharina X and Thron were subjected to this same carotid compression experiment and showed an increase in cerebral pulsation after release of compression but not the extreme effects of brain "anemia." The author concludes (as well known) that the cerebral vessels are much more sensitive to interruption of blood flow than the vessels of the arm. It is notable that psychic functions persisted despite decreases in blood flow.

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