FRONTAL cortical damage can lead to changes in affective aspects of pe
rsonality. However, the difficulty of dissociating such abnormalities
from cognitive disorders has overshadowed most previous findings. Regi
onal cerebral blood flow (rCBF) was measured with positron emission to
mography (PET) while normal subjects were assessing facial attractiven
ess. Two left frontal regions showed a significant increase in rCBF wh
ile assessing facial attractiveness. The increased rCBF in the left an
terior frontal cortex correlated with the overall percentage of assess
ments of a face as unattractive, while that in the left fronto-tempora
l junction correlated with the percentage of assessments of a face as
attractive. These findings provide direct evidence that the left front
al regions are engaged in the assessment of facial attractiveness.