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| Symbol | Description |
|---|---|
 |
O2 concentration of 
|
 |
Cerebral metabolic rate of O2 consumption |
 |
Blood flow from i to 
|
 |
O2 flux to tissue |
 |
O2 flux through shunt |
 |
O2 amount |
 |
Average O2 partial pressure |
 |
O2 partial pressure of 
|
 |
 stimulus |
 |
Blood volume |
