Early Experience Effects upon Cortical Dendrites: A Proposed Model for Development

@article{Schapiro1970EarlyEE,
  title={Early Experience Effects upon Cortical Dendrites: A Proposed Model for Development},
  author={Saul Schapiro and K. R. Vukovich},
  journal={Science},
  year={1970},
  volume={167},
  pages={292 - 294}
}
We studied the effects of environmental stimulation on the development of rat cortical pyramidal cell synaptic loci (dendritic spines) and the number of such cells staining by the rapid Golgi technique. Stimulation three to five times a day from the day of birth increased the number of spines per micrometer in 8-day-old animals and increased the number of neurons stanining at 8 to 16 days of age. This effect of afferent input upon development of the dendritic spine may represent the… 
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The study of the variability of the number of dendritic spines (DS) during exposure to various physiological or chemical factors [I, 3, 6-11] has shown that this parameter is sufficiently labile and
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Investigations have shown that during sensomotor training the total weight of the brain, thickness of the cortex, length of the dendrites, number of spines on them, the receptive surface of the postsynaptic membranes of the neurons, and also the number of glial cells in the cortex are all increased.
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Dendrites at all ages exhibited varicosities which were especially prominent on the thin dendritic branches of the earlier ages, and a comparison of the data from this study with quantified Golgi studies in adult rats indicates that by P10 and P15 the number of basilar branches is in the range seen in the adult.
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