Groot, D.M.G. de

synapses section number method thickness synapse synaptic groot projection electron technique reference shape section thickness study particle brain result density estimate tissue length plane disector series difference estimation measurement hippocampu volume non-perforated profile hippocampal reference plane change non-perforated synapses neuron perforations effect stratum regression presynaptic d.m.g microscope electron microscopy cruz-orive moment bierman surface vrensen height structure layer month intercept interference microscopy problem increase microsc value appendix variation procedure ultrathin orthogonal intercept length reconstruction analysis 3 area table stratum radiatum cortex geinisman reference area slice disector technique electron microscope complex-shaped stereology