Development of the thalamic reticular nucleus in ferrets with special reference to the perigeniculate and perireticular cell groups

The European Journal of Neuroscience
J Mitrofanis

Abstract

This study describes the development of the ferret thalamic reticular nucleus from Nissl-stained and from parvalbumin-immunostained sections. From early stages [embryonic day (E) 23-E25], there is a large group of ventral thalamic cells which lies between the dorsal thalamus and the primordial internal capsule. This group of cells, the primordial reticular nucleus, gives rise to the main body of the reticular nucleus, the perigeniculate nucleus and the perireticular nucleus. In the reticular nucleus, there are two waves of parvalbumin expression during development. The first wave begins prenatally in small cells which are seen rarely after birth. Their fate is not clear: they may have lost immunoreactivity, migrated elsewhere, or died. At the end of the first wave, a second wave begins in a distinct group of larger ovoid reticular cells, which appear to remain into adulthood. At about birth, the dorsocaudal pole of the reticular nucleus first forms the perigeniculate nucleus. During this developmental stage, cells which make up the reticular and perigeniculate nuclei are the only parvalbumin-immunostained structures in the thalamus. Thus, rather than develop from the dorsal thalamus, the perigeniculate nucleus seems to have its...Continue Reading

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Aug 23, 2005·Brain Research. Brain Research Reviews·Carmen Maria TrujilloCarmen Damas
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Apr 1, 1996·The Journal of Comparative Neurology·K L Earle, J Mitrofanis

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