Abstract
Coronal sections of the hippocampi from 67 adult human brains were examined macroscopically and histologically in Nissl stained specimens. The hippocampus is divisible into a rostral third and a caudal two thirds. The rostral portion is morphologically much more variable. Its cortical band possesses between one and five subconvolutions. The size of the rostral hippocampus was found to increase in direct proportion to that of the caudal portion. The number of subconvolutions present in the rostral third of any hippocampus was found to be independent of its overall size, the area constant of the caudal two thirds, and the overall dimensions of the surrounding temporo occipital areas. The number of convolutions in the rostral third could not be related to variations in the density of pyramidal neurons in its CA2 fields. Some developmental features of the hippocampus and dentate gyrus are discussed.
Original language | English |
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Pages (from-to) | 367-376 |
Number of pages | 10 |
Journal | Johns Hopkins Medical Journal |
Volume | 130 |
Issue number | 6 |
State | Published - 1972 |
Externally published | Yes |