QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

HOME  |   SEARCH  |   ARCHIVE  |   SUBSCRIBE  |   CONTACT  |   HELP

This Article Full Text Full Text (PDF) Submit an eLetter Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (31) Citing Articles via Google Scholar Google Scholar Articles by Sauvé, Y. Articles by Rasminsky, M. Search for Related Content PubMed PubMed Citation Articles by Sauvé, Y. Articles by Rasminsky, M.

 Previous Article  |  Next Article 

The Journal of Neuroscience, February 1, 2001, 21(3):951-960

Topological Specificity in Reinnervation of the Superior Colliculus by Regenerated Retinal Ganglion Cell Axons in Adult Hamsters

Yves Sauvé, Hajime Sawai, and Michael Rasminsky

Centre for Research in Neuroscience, Montreal General Hospital and McGill University, Montreal, Quebec, H3G 1A4, Canada

In normal rodents there is a precise topology of the retinocollicular projection, the nasotemporal and ventrodorsal axes of the retina being respectively projected onto the caudorostral and mediolateral axes of the contralateral superior colliculus (SC). We evaluated the distribution of regenerated retinal ganglion cell (RGC) axon terminals in the SC of adult hamsters in which an unbranched peripheral nerve graft was directed from the retina to the contralateral SC. Responses to visual stimulation of individual RGCs were recorded from terminal arbors of their regenerated axons in the reinnervated SC. Retinal positions of these RGCs were inferred from the locations of their visual receptive fields. At some sites in the reinnervated SC, axon terminal arbors converged from widely separated RGCs. Conversely, axon terminal arbors at widely separated sites in the SC could emanate from contiguous RGCs. To assess whether any tendency for order was superimposed on the apparent disorganization of the regenerated projection, we evaluated the relative positions of pairs of RGC terminals in the SC in relation to the relative retinal locations of the corresponding pairs of RGCs. Among the 983 pairs of RGCs able to be evaluated from nine animals studied 30-60 weeks after grafting, there was a statistically significant 3/2 tendency for the more nasally situated of two RGCs to project its terminal more caudally in the SC than that of the more temporally situated RGC. A similar tendency toward appropriate organization was not found with respect to the ventrodorsal axis of the retina and the mediolateral axis of the SC.

Key words: electrophysiology; hamster; peripheral nerve graft; regeneration; retinal ganglion cell; retinotopy; superior colliculus; synapse; tectum

---

Copyright © 2001 Society for Neuroscience  0270-6474/01/213951-10$05.00/0

This article has been cited by other articles:

				D. J. Haustead, S. S. Lukehurst, G. T. Clutton, C. A. Bartlett, S. A. Dunlop, C. A. Arrese, R. M. Sherrard, and J. Rodger Functional Topography and Integration of the Contralateral and Ipsilateral Retinocollicular Projections of Ephrin-A-/- Mice J. Neurosci., July 16, 2008; 28(29): 7376 - 7386. [Abstract] [Full Text] [PDF]

				S. Wang, B. Lu, S. Girman, T. Holmes, N. Bischoff, and R. D. Lund Morphological and Functional Rescue in RCS Rats after RPE Cell Line Transplantation at a Later Stage of Degeneration Invest. Ophthalmol. Vis. Sci., January 1, 2008; 49(1): 416 - 421. [Abstract] [Full Text] [PDF]

				F. de Winter, Q. Cui, N. Symons, J. Verhaagen, and A. R. Harvey Expression of Class-3 Semaphorins and Their Receptors in the Neonatal and Adult Rat Retina Invest. Ophthalmol. Vis. Sci., December 1, 2004; 45(12): 4554 - 4562. [Abstract] [Full Text] [PDF]

Home  |   Search  |   Archive  |   Subscribe  |   Contact  |   Help