Section 48
Chapter 47,877

Unilateral enucleation of adult rats does not effect the synapse-to-neuron ratio within the stratum griseum superficiale of the superior colliculi

Smith, S.A.; Bedi, K.S.

Vision Research 38(20): 3041-3050


ISSN/ISBN: 0042-6989
PMID: 9893813
DOI: 10.1016/s0042-6989(98)00040-6
Accession: 047876255

Download citation:  

Ninety-day-old hooded male rats were anaesthetised with an intraperitoneal injection of a mixture of xylazine and ketamine and had their right eyes removed. Groups of non-enucleated control and enucleated rats were killed at either 150 or 390 days of age by intracardiac perfusion with fixatives. Stereological methods were used to estimate the synapse-to-neuron ratios within the stratum griseum superficiale (SGS) layers of both the ipsi- and contra-lateral superior colliculi. The enucleation had no significant effects on this ratio irrespective of the side or age of the brains examined. This experiment shows that a constant synapse-to-neuron ratio may be maintained within the SGS layer of the rat superior colliculus despite the inevitable loss of synaptic contacts due to the anterograde transneuronal degeneration initiated by the enucleation.

PDF emailed within 0-6 h: $19.90