Okuma Y, Nishimiya J, Narabayashi H, Inoue R, Kuru Y
Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.
No To Shinkei. 1988 Mar;40(3):233-9.
In recent years brain CT scan has been so popular that many investigators have been trying to clarify the normal CT images. But little attention has been paid to the inferior horns of lateral ventricles in spite of their importance for judging mesial temporal lobe structures. The present study was designed to elucidate how the inferior horns were visualized on brain CT in normal subjects from childhood to aged group, and to evaluate whether the inferior horns were dilated in the epileptics or not. The subjects of the present study were 502 normal controls (2-79 y, mean 36.1 y) and 163 epileptic patients with normal CT image (4-68 y, mean 26.6 y) including 55 cases of temporal lobe epileptics. CT scans were performed with EMI 1010 scanner, and slices were obtained every 10 mm from the projection of 5-10 degrees angle for orbito-meatal line. Inferior horns were examined at the level of basal cisterns. Because inferior horns were not necessarily visible in our cases, we examined the frequency of clearly visualized inferior horns at each decade, and regarded their frequency as the size of inferior horns at each decade. In normal controls, frequency of visible inferior horns was relatively high in early childhood, and decreased as they grew. In the 3 rd to 4 th decades the visibility frequency became the lowest (30-35%), and then gradually increased as the subjects became older.(ABSTRACT TRUNCATED AT 250 WORDS)
