Summary
The proximal portion of the Purkinje cell axon in normal cerebellum was investigated using the Golgi-Cox method. The axon emerging from the axon hillock tapered as it proceeded distally along the initial segment. The most distal portion of the initial segment was the narrowest (about 1 μm). Then the axon became thicker again in the probable myelinated portion. The length of the axon hillock plus the initial segment ranged from 21 μm to 52 μm, 35±6 μm on average ±SD. The axon arose from any site of the soma and the primary dendrite of the Purkinje cell. Almost half of the axons emanated from a lateral surface of the soma. The dendritic arbores of the Purkinje cell with a torpedo were atrophic.
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Kato, T., Hirano, A. A Golgi study of the proximal portion of the human Purkinje cell axon. Acta Neuropathol 68, 191–195 (1985). https://doi.org/10.1007/BF00690193
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DOI: https://doi.org/10.1007/BF00690193