A patient with typical features of Angelman syndrome - a genetically i
nherited disorder involving developmental delay, ataxia, episodes of p
aroxysmal laughter and brachiocephaly - was studied with single-photon
emission tomography. Hypoperfusion found in the left frontal and left
temporoparietal regions can provide insights into the functional cere
bral pathology, which may be due to a disturbance of the developmental
process related to a chromosomal abnormality.