Abstract
Abstract We have quantitatively analyzed the three-dimensional dendritic structure of an identified nonspiking interneuron, Local Directionally Selective (LDS) interneuron in the terminal abdominal ganglion of the crayfish, Procambarus clarkii Girard, using a confocal laser scanning microscopic system. Comparison of the cell size before and after fixation followed by dehydration and clearing revealed that the diameter of dendritic branches shrank by about 15% while the branch length showed no significant change. The soma and dendritic diameter in vivo were obtained from the measurement in the cleared preparation multiplied by the shrinkage factor. The total length of dendrites and their membrane area as well as their electrotonic structure were found to vary from preparation to preparation. The spatial distribution of fine dendritic branches was variable, but that of major branches was constant among preparations. The interneuron further shared bilaterally asymmetrical dendritic structure: those branches ...
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