Keywords: Neurofluids, Neurofluids, Yawning, CSFDespite being a common behaviour amongst many animals, research into the mechanics of yawning is limited. We have attempted to address this by performing sagittal real time scans and phase contrast scans to observe the flow of cerebrospinal fluid and blood through the midplane of the C3 vertebra of the spine during induced yawning. We found that over the course of a yawn venous flow and CSF flow both moved caudally during inspiration and rostrally during expiration.
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