brain oxygen measurement partial pressure of brain gray matter oxygen 2021-01-05T16:37:37Z CMO:0003627 PMID:24549186 PMID:30899601 The quantification of interstitial oxygen in the gray matter of the brain, the portion of the central nervous system enclosed within the cranium which is composed of gray matter and white matter and is the primary center for the regulation and control of bodily activities.The brain tissue partial pressure of oxygen (PtO2) depends on the cerebral metabolic rate (CMR), the local cerebral blood flow (CBF) and the systemic exposure of hypoxia. artial pressure of brain grey matter oxygen brain gray matter PtO2 measurement brain gray matter partial pressure of oxygen measurement clinical_measurement_ontology slaulede