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38 Cards in this Set
- Front
- Back
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What separates the cerebrum from the cerebellum? |
1. Tentorium cerebelli |
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What divides the two cerebellar hemispheres? |
1. Falx cerebelli-- projects into the vallecula |
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What does the primary fissure separate? |
1. Anterior lobe 2. Posterior lobe |
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What is the relationship of the cerebellar peduncles to the 4th ventricle? |
1. Form the lateral wall of the 4th ventricle |
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What is the arbor vitae? |
1. Link between grey matter of cerebellar cortex and brainstem |
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What is the arrangement of the cerebellar nuclei? |
1. Medial---> lateral 2. Fastigial, globose, emboliform, dentate |
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What are the interposed nuclei? |
1. Globose 2. Emboliform |
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What are the layers of the arbor vitae? |
1. Deep---> superficial 2. Granular layer---purkinje layer----- molecular layer |
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What is the division of the fibers running from the cerebellar peduncles to the arbor vitae? What is their input? |
1. Mossy fibers--- weak but broadly distributed input 2. Climbing fibers--- powerful but spacially restricted |
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Where do mossy fibers terminate? |
1. Granular layer 2. Forms excitatory synapse on granule cells 3. Axon from granule cells forms parallel fibers |
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Where do parallel fibers run? What do they form? |
1. Run within folia 2. Form excitatory connections with golgi cells, basket and stellate cells, and purkinje cells |
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Where do climbing fibers synapse? |
1. Purkinje neurons |
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What cell is involved in inhibitory feedback on parallel fibers? |
1. Golgi neurons |
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What cells are involved in inhibitory feedback on Purkinje neurons? |
1. Stellate cells 2. Basket cells |
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What is the only output from the cerebellar cortex? What is its function? |
1. Purkinje neuron 2. Inhibitory |
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Where does most of the output from the cerebellum run? |
1. Depp cerebellar nuclei |
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What is the relative firing rate between Purkinje neurons and climbing fibers? |
1. Purkinje fire at a high resting rate 2. Climbing fibers fire less frequently--- recalibrate Purkinje neurons |
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What makes up the spinocerebellum? |
1. Vermis 2. Medial portions of anterior and posterior lobes (intermediate hemisphere) |
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What does the spinocerebellum incorporate? |
1. Fastigial 2. Emboliform 3. Globose 4. Controls posture and movement of trunk and limbs |
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What makes up the cerebrocerebellum? |
1. Middle and lateral portions of the anterior and posterior lobes of the cerebellar cortex (lateral hemispheres) |
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What does the cerebrocerebellum incorporate? |
1. Dentate nucleus 2. Controls planning of movement and nonvoter functions |
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What makes up the vestibulocerebellum? |
1. Flocculonodular lobe |
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What does the vestibulocerebellum incorporate? |
1. Fastigial nuclei 2. Controls head and eye movements |
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What attaches the cerebellum to the rest of the brain? |
1. Cerebellar peduncle |
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What does the middle cerebellar peduncle connect? |
1. Pontine nuclei to contralateral side of the pons--- pontocerebellar fibers |
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What forms the basis pontis? |
1. Pontocerebellar fibers + proliferative pontine nuclei |
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What does the superior cerebellar peduncle connect? |
1. Cerebellum to the pons and midbrain |
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Where do the fibers of the superior cerebellar peduncle terminate? |
1. Red nucleus 2. Inferior colliculus |
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What type of fibers run through the superior cerebellar peduncle? |
1. Mostly efferents 2. Exception: ventral spinocerebellar tract |
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What are the major arteries to the cerebellum? |
1. Superior cerebellar artery 2. Anterior inferior cerebellar artery 3. PICA |
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What is the artery of origin of the superior cerebellar artery? What does it subsequently form? |
1. Branches from basilar artery 2. Forms posterior margin of circle of Willis |
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What portion of the cerebellum does the superior cerebellar a. perfuse? |
1. Anterior lobe of the cerebellum 2. Anterior 2/3 of the vermis
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What artery is involved in trigeminal neuralgia? |
1. Superior cerebellar artery |
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What does the AICA perfuse? |
1. Inferior superior surface of the posterior lobe 2. Flocculonodular lobe 3. Base of cerebellar peduncles |
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What is the largest branch of the vertebral artery? |
1. PICA |
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Between what nerves does the PICA pass? |
1. X and XI |
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What does the PICA supply? |
1. Caudal 1/3 of the vermis 2. Posterior half of posterior lobe of cerebellum |
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What does the inferior cerebellar peduncle connect? What tract runs through it? |
1. Cerebellum to medulla oblongata and spinal cord 2. AKA: restiform and juxarestiform bodies 3. Conduit for spinocerebellar tract |
