On the basis of cytoarchitectonic criteria, the dorsal border of the postrhinal cortex (POR) is difficult to establish throughout its extent. POR lacks a clear laminar structure which is more conspicous in the adjacent cortex. Layer II of temporal and primary visual cortex is more densely packed, and cells in layers II and III tend to be slightly smaller than in POR. Layer V in POR also is less dense compared to adjacent cortex and layer IV is less conspicuous in POR. Ectopic layer II cells, a distinct feature of POR are absent in the dorsally adjacent cortices. Using immunostaining for calbindin does not show much of a border although at the dorsal border of POR, there is a slight increase in staining intensity in deeper layers, resulting in a more bilaminar staining pattern. Sections stained for parvalbumin though provide a pretty strict border between since the dorsally adjacent cortex does stain with this marker whereas all layers of POR are almost completely negative except for the presence of an occasional positive neuron.
References -> access a list of references
NIF Navigator (external link) -> search the Neuroscience Information Framework |
|