Shifting retinal maps in the development of the lateral geniculate nucleus
- 1 April 1989
- journal article
- Published by Elsevier BV in Developmental Brain Research
- Vol. 46 (2), 187-196
- https://doi.org/10.1016/0165-3806(89)90282-4
Abstract
During development, the bilateral projections from each eye to subcortical visual structures in the mammal initially overlap throughout the majority of the dorsal lateral geniculate nucleus (dLGN) and superior colliculus (SC) before retracting to their separate territories. It has been shown in the ferret that during this period the larger contralateral retinal projection to both the dLGN and SC is retinotopically organised. By making small retinal lesions, and then anterogradely labelling the remaining retinofugal pathway from one eye, this study demonstrates that on the day of birth there is a superficial region of the dLGN in which the retinotopic map cannot be demonstrated. This region may be the presumptive C laminae. Further, by making small lesions in the temporal retina it has been shown that the smaller ipsilateral projection is also retinotopically organised before it retracts. Large lesions confined to the nasal retina had no effect on the pattern of label in the ipsilateral dLGN. Consequently, the ipsilateral projection which fills the nucleus at this stage must arise from the temporal retina. Because of this, the process of segregation requires that the retinotopic maps from each eye shift in relation to one another, and the borders of the nucleus to form the adult pattern.Keywords
This publication has 21 references indexed in Scilit:
- Axon trajectories and pattern of terminal arborization during the prenatal development of the cat's retinogeniculate pathwayJournal of Comparative Neurology, 1987
- Growth cones, dying axons, and developmental fluctuations in the fiber population of the cat's optic nerveJournal of Comparative Neurology, 1986
- Retinotopic order appears before ocular separation in developing visual pathwaysNature, 1985
- Regressive Events in NeurogenesisScience, 1984
- Retinal ganglion cell death and terminal field retraction in the developing rodent visual systemDevelopmental Brain Research, 1984
- The optic nerve of the cat: Appearance and loss of axons during normal developmentDevelopmental Brain Research, 1982
- Alterations in Precision of the Crossed Retinotectal Projection During Chick DevelopmentScience, 1982
- The dorsal lateral geniculate nucleus of the normal ferret and its postnatal developmentJournal of Comparative Neurology, 1981
- Tetramethyl benzidine for horseradish peroxidase neurohistochemistry: a non-carcinogenic blue reaction product with superior sensitivity for visualizing neural afferents and efferents.Journal of Histochemistry & Cytochemistry, 1978
- Some Principles of Organization in the Dorsal Lateral Geniculate Nucleus; pp. 253–267Brain, Behavior and Evolution, 1972