Further observations on cerebellar climbing fibers. A study by means of light microscopy, confocal laser scanning microscopy and scanning and transmission electron microscopy
Biocell
;
24(3): 197-212, Dec. 2000.
Article
in English
| LILACS
| ID: lil-335898
RESUMO
The intracortical pathways of climbing fibers were traced in several vertebrate cerebella using light microscopy, confocal laser scanning microscopy, scanning and transmission electron microscopy. They were identified as fine fibers up to 1(micron thick, with a characteristic crossing-over bifurcation pattern. Climbing fiber collaterals were tridimensionally visualized forming thin climbing fiber glomeruli in the granular layer. Confocal laser scanning microscopy revealed three types of collateral processes at the interface between granular and Purkinje cell layers. Scanning electron microscopy showed climbing fiber retrograde collaterals in the molecular layer. Asymmetric synaptic contacts of climbing fibers with Purkinje dendritic spines and stellate neuron dendrites were characterized by transmission electron microscopy. Correlative microscopy allowed us to obtain the basic three-dimensional morphological features of climbing fibers in several vertebrates and to show with more accuracy a higher degree of lateral collateralization of these fibers within the cerebellar cortex. The correlative microscopy approach provides new views in the cerebellar cortex information processing.
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Index:
LILACS (Americas)
Main subject:
Purkinje Cells
/
Axons
/
Olivary Nucleus
/
Cerebellar Cortex
/
Dendrites
/
Neural Pathways
Type of study:
Prognostic study
Limits:
Animals
/
Humans
Language:
English
Journal:
Biocell
Journal subject:
Clulas
Year:
2000
Type:
Article
Affiliation country:
Venezuela
Institution/Affiliation country:
Universidad del Zulia/VE
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