title: Morphometry of the effect of increased experience and training on synaptic density in area CA3 of the rat hippocampus.
abstract: A morphometric analysis of the effect of differential experiences on synapses was performed in area CA3 of the rat hippocampus. Two methods of quantitation that used a superimposed lattice grid were employed. In the first method squares overlying synapses were measured as a proportion of the total number of squares scanned; in the second method intersections of lattice lines with synapses were counted as a proportion of the total length of lines. Both measures showed that rats which were housed in an enriched environment and received 10 weeks of training had a significant increase in total area of synaptic contacts compared to both nonenriched controls and a croup with increased motor activity.
mesh_terms: D000818:Animals; D006624:Hippocampus / Q000502:physiology* / Q000648:ultrastructure; D007858:Learning; D008297:Male; D051381:Rats; D013569:Synapses / Q000502:physiology* / Q000648:ultrastructure