The researchers also found that a part of the right frontal brain previously linked to smell perception exhibited increased blood flow
as volunteers smelled the pleasant odor, regardless of its intensity.
The same illusory movement yielded increased blood flow
in several other parts of the cortex and the inner brain.
In contrast, coherent shapes--especially three-dimensional ones--yielded much stronger LOC responses accompanied by diminished blood flow
in the primary visual cortex.
Because gravity plays such a critical role in determining the pressure and distribution of blood flow
within the circulation, the absence of gravity such as occurs in space flight affords a unique environment [in which] to examine these control systems," he says.
The researchers couldn't discern from these brain scans whether the observed changes in blood flow
stem from specific physical changes that occur in brain maturation or from a general superiority in word knowledge among adults.
The KDOQI guidelines suggest the use of access blood flow
studies as a part of AV access surveillance.
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