The frozen sections from pigeons' brains were stained with haematoxylin-eosin( HE),methylene blue,cresyl violet,neutral red and Cajal's staining method respectively to explore the influence of different dyeing methods on pigeon hippocampal neuron forms,then the shape and size of neurons were compared and analyzed under optical microscope. It is found that perikaryons,axons,dendrites and nucleus are more clearly seen when stained with cresyl violet; The length and diameter in the neurons stained with neutral...