Synaptic Vesicles of Inhibitory and Excitatory Terminals in the Cerebellum

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Science  19 May 1967:
Vol. 156, Issue 3777, pp. 967-969
DOI: 10.1126/science.156.3777.967


Populations of synaptic vesicles within cerebellar terminals considered excitatory or inhibitory on the basis of physiological evidence differ with respect to size and shape. Size rather than shape appears to be the main morphological difference between these populations. Elongation of vesicles is depenident on fixation with aldehyde fixatives, and both size and elongation change with age mainly during maturation.