alt Hacker NewsReally? This was known: "there is no generally valid coupling between the oxygen content measured by MRI and neuronal activity"?
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mattkrause • last Tuesday at 10:03 PM
"generally valid" is a bit of a loaded phrase.
They are indeed coupled, but the coupling is complicated and may be situationally dependent.
Honestly, it's hard to imagine many aggregate measurements that aren't. For example, suppose you learn that the average worker's pay increased. Is it because a) the economy is booming or b) the economy crashed and lower-paid workers have all been laid off (and are no longer counted).
The coupling was always debated, but you are right, that wasn't known or at least decided. I made a mistake and you are right.
Hasty post. I apologize.