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Ultrastructural studies on cerebellar histogenesis in the frog: the external granular layer and the molecular layer
- Source :
- Brain research. 153(3)
- Publication Year :
- 1978
-
Abstract
- Maturational changes of the cerebellum of frog tadpoles were studied with the electron microscope. In the premetamorphic tadpole, parallel fiber-like processes (PFP) were present in the incipient molecular layer, long before the appearance of the external granular layer (EGL). These PFP showed synaptic contacts with the precociously developed Purkinje cell dendrites. It appears that these PFP may be responsible for inducing the precocious elaboration of the Purkinje cell dendritic arborization. In the metamorphosing tadpoles, the EGL cells migrating into the internal granular layer were frequently seen in close association with the ependymoglial cell processes, which extend from the pia down toward the ependymal surface. This observation lends support to the hypothesis that glial processes guide the migrating EGL cells.
- Subjects :
- Cerebellum
animal structures
Internal granular layer
Purkinje cell
External Granular Layer
Biology
Histogenesis
Cytoplasmic Granules
law.invention
Purkinje Cells
Nerve Fibers
law
Ependyma
medicine
Animals
Molecular Biology
Rana catesbeiana
General Neuroscience
Rana pipiens
Metamorphosis, Biological
Cell Differentiation
Dendrites
biology.organism_classification
Tadpole
Cell biology
medicine.anatomical_structure
Ultrastructure
Neurology (clinical)
Synaptic Vesicles
Electron microscope
Neuroscience
Developmental Biology
Subjects
Details
- ISSN :
- 00068993
- Volume :
- 153
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Brain research
- Accession number :
- edsair.doi.dedup.....ffaa1d92a447f47a649265f254ca5322