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Concerning the Movements of the Blood Vessels in the External Ear of the Rabbit1 

Concerning the Movements of the Blood Vessels in the External Ear of the Rabbit1
Chapter:
Concerning the Movements of the Blood Vessels in the External Ear of the Rabbit1
Author(s):

Marcus E. Raichle

DOI:
10.1093/med/9780199358984.003.0008
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date: 29 October 2020

This chapter concerns the movements of the blood vessels in the external ear of the rabbit. The ear of the rabbit is very sensitive to environmental and behavioral changes. The author concludes that movements of its blood vessels are correlated with sensory impressions and mental state, providing support for the author’s similar approach in the human brain. In the rabbit, contraction of the ear vessels is closely correlated with respiratory movements. Both, in turn, reflect emotional responses such as being frightened by a predator, further supporting their use in reflecting similar responses to emotional events in the cerebral circulation. The author, as well as previous workers, found that contraction and relaxation of the ear vessels are often independent of fluctuations in carotid blood pressure, providing further evidence for the independence of the circulation in different parts of the body.

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