brain molecular composition measurement brain oxygen measurement 2020-05-22T14:09:29Z CMO:0003417 PMID:24549186 PMID:30899601 The quantification of interstitial oxygen in 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. brain PtO2 measurement brain oxygen saturation measurement brain partial pressure of oxygen measurement clinical_measurement_ontology slaulede