Brain, Vol 120, Issue 9 1675-1684, Copyright © 1997 by Oxford University Press
LJ Karhunen, RI Lappalainen, EJ Vanninen, JT Kuikka and MI Uusitupa
The cerebral responses elicited by the sight of food and food-related cues
are poorly known in humans. Therefore, regional cerebral blood flow (rCBF)
was measured during food exposure in 11 obese and 12 normal- weight women.
The rCBF was mapped while the subject was looking at a picture of a
landscape (control) or at a portion of food (food exposure), and was
measured by 99mTc-ethyl-cysteine-dimer single photon emission computed
tomography. In the obese women, the rCBF was higher in the right parietal
and temporal cortices during the food exposure than in the control
condition. In addition, in the obese women the activation of the right
parietal cortex was associated with an enhanced feeling of hunger when
looking at food. No such changes or associations were seen in the
normal-weight women. In conclusion, exposure to food is associated with
increases in the rCBF of right parietal and temporal cortices in obese
women, but not in normal-weight women.
ARTICLES
Regional cerebral blood flow during food exposure in obese and normal- weight women
Department of Clinical Nutrition, University of Kuopio, Finland.
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