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The rete mirabile in bottlenose dolphins exerts a pressure-damping effect on cerebral circulation, resulting in nonpulsatile pressure profiles in the brain's arterial supply.
In the bottlenose dolphin Tursiops truncatus, a massive retial complex is interposed between the systemic and cerebral circulations at the cervicothoracic level. Pressure measurements in the retial efferent arteries supplying the brain revealed relatively nonpulsatile pressure profiles. These measurements in the anesthetized dolphin demonstrate the pressure-damping effect of the retia mirabile.
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Nagel et al. (1968) studied this question.
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