Difference between revisions of "BrainComponentCerebellum"
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<pre style="color: green">Cerebellum</pre> | <pre style="color: green">Cerebellum</pre> | ||
[[Home]] -> [[BiologicalLifeResearch]] -> [[OverallMindMaps]] -> [[BrainComponentCerebellum]] | [[Home]] -> [[BiologicalLifeResearch]] -> [[OverallMindMaps]] -> [[BrainComponentCerebellum]] | ||
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Raphe Nucleus: | Raphe Nucleus: | ||
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* to cerebellar cortex | * to cerebellar cortex | ||
Locus Ceruleus: | Locus Ceruleus: | ||
* to Purkinje cells | * to Purkinje cells | ||
Latest revision as of 18:54, 28 November 2018
Cerebellum
Home -> BiologicalLifeResearch -> OverallMindMaps -> BrainComponentCerebellum
Divisions
Cerebellum consists of:
- Fastigial Nucleus
- Globose Nucleus
- Emboliform Nucleus
- Dentate Nucleus
- Cerebellum Cortex
- Interposed Nucleus = Globose Nucleus + Emboliform Nucleus
Diagrams
Neurons:
Connections:
Cerebellum Cortex
Cerebellum Cortex consists of:
- Medial=Vermal (projects to Fastigial Nucleus)
- Intermediate=Paravermal (projects to Interposed Nucleus)
- Lateral=Hemisphere (projects to Dentate Nucleus)
Cerebellum Lobes:
- Archicerebellum=Vestibulocerebellum (vermis) - vestibular->body
- Paleocerebellum=Spinocerebellum (vermal, paravermal) - body->body
- Neocerebellum (posterior) - cerebral cortex->body
Cortex Layers:
- Molecular layer (outer)
- Purkinje cell layer
- Granular layer
Cerebellum Neurons
- granular cells (total 100G) - like "T"
- 4-6 short dendrites
- axon goes to molecular layer and bifurcates into 2 branches
- branches go in opposite directions
- branches have excitatory synapses with Purkinje cells dendrites
- Purkinje cell - the only output of CR
- each Purkinje cell receives synapses from thousands of parallel fibers
- Purkinje cell projects to CR nuclei as inhibitory
- recurrent axon collaterals have inhibitory connections with other Purkinje cells
- cerebellum nuclei exert excitary influences on muscles
Cerebellum Inputs
Climbing Fibers:
- arrive from inferior olivary nucleus
- excitatory to cerebellum cortex Purkinje cells
- excitatory to cerebellum nuclei
- each fiber divides into 10 branches within granular layer
- branches go to molecular layer and synapse with Purkinje cells
- each branch has several hundreds of synapses
- one branch contacts several Purkinje cells
- one Purkinje cell receives input from only one climbing fiber
Mossy Fibers:
- originate from SC, vestibular, trigeminal, pontine, bRF
- excitatory to granule cells
- excitatory to cerebellum nuclei
Raphe Nucleus:
- to cerebellar nuclei
- to cerebellar cortex
Locus Ceruleus:
- to Purkinje cells
