Neurogenesis in a marsupial: the brush-tailed possum (Trichosurus vulpecula). I. Visual and auditory pathways.
The times of origin of neurons in the visual and auditory systems were studied in a marsupial, the brush-tailed possum, using tritiated thymidine autoradiography. Within the subcortical visual pathways, most neurons are generated between postnatal days 5 and 21, and the neurons of the primary visual cortex up to postnatal day 68. In the subcortical auditory pathways, most neurons are generated between postnatal days 5 and 28, and all auditory cortex neurons have appeared by postnatal day 46. Neurons in a single layer of cerebral cortex are generated during a period of about 2 weeks. Thus cortical neurogenesis in marsupials extends over a period similar to that seen in primates.
Sanderson
K J
KJ
School of Biological Sciences, Flinders University, Bedford Park, S.A.
Aitkin
L M
LM
D000818:Animals; D001303:Auditory Cortex / Q000166:cytology; D001306:Auditory Pathways / Q000166:cytology*; D001933:Brain Stem / Q000166:cytology*; D002454:Cell Differentiation / Q000502:physiology*; D002455:Cell Division / Q000502:physiology; D002540:Cerebral Cortex / Q000166:cytology*; D005260:Female; D008297:Male; D008394:Marsupialia / Q000033:anatomy & histology*; D014793:Visual Cortex / Q000166:cytology; D014795:Visual Pathways / Q000166:cytology*