[Neuroscience] Re: Blood Oxygenation Level-Dependent Signal Level?

Jeff B. jeffbaure at yahoo.fr
Fri Sep 16 06:06:57 EST 2005


Le Thu, 15 Sep 2005 20:46:18 -0400, r norman
<NotMyRealEmail at _comcast.net> a écrit :

>>Can someone provide a reasonably concise definition of "Blood
>>Oxygenation Level-Dependent Signal Level" and its correlates?

>Google on "blood oxidation level dependent signal" and you get a lot
>of good hits.  The functional MRI (fMRI) imaging signal that is
>recorded depends on blood oxygen level.  Therefore the level
>(magnitude) of that signal is called  "blood oxygenation level
>dependent".

Maybe this is also relevant for HEG (HemoEncephaloGraphy) which
estimates the frontal activity levels via near IR spectrometry and
blood oxygenation.
Jeff


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