Postnatal changes in the numerical density and total number of asymmetric and symmetric synapses in the hypoglossal nucleus of the rat.


Morphometric analyses were performed to investigate the progressive and regressive phases of synaptogenesis in the hypoglossal nucleus of the rat during normal postnatal development. The total volume of the hypoglossal nucleus and both the numerical density (NV, contacts per mm3) and total number of synapses were measured at 5-day intervals from birth to… (More)


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