> Look up "pump head". That doesn't seem to be exactly the same. https://en.wikipedia.org/wiki/Postperfusion_syndrome https://en.wikipedia.org/wiki/Postperfus

> Look up "pump head". That doesn't seem to be exactly the same. https://en.wikipedia.org/wiki/Postperfusion_syndrome https://en.wikipedia.org/wiki/Postperfusion_syndrome says > Physicians have theorized that the syndrome is caused by tiny debris and air bubbles (microemboli) that enter the brain via cardiopulmonary bypass which doesn't seem to be related to the pulse, as such. The linked article says > current methods for artificial control of cerebral circulation can abolish pulsatility-dependent vascular signaling or neural network phenomena such as the electrocorticogram even while preserving individual neuronal activity. So to this layman, they're saying the nervous system behaves differently without the pulse, and the study the animal is being used for might suffer from those differences.