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On the Fluctuations of the Cerebral Tracings That Are Controlled by the Movements of the Vessels and of the Heart 

On the Fluctuations of the Cerebral Tracings That Are Controlled by the Movements of the Vessels and of the Heart
Chapter:
On the Fluctuations of the Cerebral Tracings That Are Controlled by the Movements of the Vessels and of the Heart
Author(s):

Marcus E. Raichle

DOI:
10.1093/med/9780199358984.003.0007
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date: 05 March 2021

This chapter discusses the fluctuations of the cerebral tracings that are controlled by the movements of the vessels and of the heart. In addition to pulsations due to the heart and oscillations due to respiration, the author reports slower rises and falls of the tracings, which are called "undulations." In general, the author thinks of these as "spontaneous movements of the vessels." These are found in vessels of the body and in tracings from the brain. Some are categorized as "passive" (changes in blood pressure not due to vessels of the organ) in contrast to "active" (due to the individual pulsations of the brain). The author’s studies show that undulations are not controlled by respiration and do not always correspond between different body parts (forearm and cerebrum).

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