3. Physiology
        3.2. Cardiovascular
            3.2.5. Special circulations
3.2.5.1. Cerebral blood flow

Cerebral blood flow

Some brain-specific figures:

NB:

Cerebral blood flow (CBF)

CBF
= 15% of cardiac output
= 750mLs blood/min
= 50-54mLs/min/100g

Thus, O2 flux = 150mL O2/min delivered

Cerebral metabolic rate of oxygen consumption

(i.e. CMRO2)

CMRO2
= 20% of total basal oxygen consumption
= 50 mLs O2/min
= 3-3.5mLs O2/min/100g

NB:

O2 extraction ratio in brain

= CMRO2/O2 flux

= 50/150

= 33%

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