Difference between revisions of "BrainComponentCerebellum"
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| − | + | __TOC__ | |
= Divisions = | = Divisions = | ||
Cerebellum consists of: | Cerebellum consists of: | ||
| − | * | + | * '''Fastigial Nucleus''' |
| − | * | + | * '''Globose Nucleus''' |
| − | * | + | * '''Emboliform Nucleus''' |
| − | * | + | * '''Dentate Nucleus''' |
| − | * | + | * '''Cerebellum Cortex''' |
* Interposed Nucleus = Globose Nucleus + Emboliform Nucleus | * Interposed Nucleus = Globose Nucleus + Emboliform Nucleus | ||
= Diagrams = | = Diagrams = | ||
| − | *Neurons:* | + | *Neurons:* '''Neurons:''' |
http://ahuman.googlecode.com/svn/images/wiki/research/human/18-cerebellum/F18-3.png | http://ahuman.googlecode.com/svn/images/wiki/research/human/18-cerebellum/F18-3.png | ||
| − | *Connections:* | + | *Connections:* '''Connections:''' |
http://ahuman.googlecode.com/svn/images/wiki/research/human/18-cerebellum/F18-4.png | http://ahuman.googlecode.com/svn/images/wiki/research/human/18-cerebellum/F18-4.png | ||
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* granular cells (total 100G) - like "T" | * 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 | * 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 nuclei exert excitary influences on muscles | ||
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Climbing Fibers: | Climbing Fibers: | ||
| − | * arrive from | + | * arrive from '''inferior olivary nucleus''' |
* excitatory to cerebellum cortex Purkinje cells | * excitatory to cerebellum cortex Purkinje cells | ||
* excitatory to cerebellum nuclei | * excitatory to cerebellum nuclei | ||
Revision as of 10:40, 16 June 2015
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:* Neurons:
- Connections:* 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
