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Fig. 1.4.1.20. Purkinje cell dendritic spines. On the left, a longitudinally sectioned
spine with smooth endoplasmic reticulum (arrow) and a cluster of polyribosomes
located at the origin of the spine from the dendrite (D).
Adjacent and synapsing with the same bouton is another, transversally sectioned
spine. On the right, a transversally sectioned dendritic spine with smooth endoplasmic
reticulum in the head (large arrow).
Nearby spine necks are embedded in a glial process (small arrow).
Scale = 200 nm. (Rat, mouse, cerebellar cortex.)
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