Identify the general features location amp relation of the cerebellum Describe the surfaces parts lobes amp zones of the cerebellum Study the internal structure amp connections Consider important clinical disorders related to the cerebellum ID: 1042540
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1. The CerebellumObjectivesIdentify the general features, location & relation of the cerebellumDescribe the surfaces, parts, lobes & zones of the cerebellumStudy the internal structure & connectionsConsider important clinical disorders related to the cerebellum
2. Location & RelationsThe cerebellum (Latin= small brain) is the largest part of the hindbrain (10% of total brain weight) occupying the posterior cranial fossa. It’s related anteriorly by the pons, MO & 4th ventricle, superiorly by the tentorium cerebelli (& occipitotempral cortex); & posteroinferiorly by the squamous part of the occiput.
3. Surfaces1) The superior surface is convexoconcave in conformity with the shape of the tentorium. 2) The post.inf. surface is convex backwards in conformity with the shape of the occiput & contains the post. cerebellar notch that lodges the falx cerebelli; which partially separates the 2 cerebellar hemispheres.3) The ant.inf. surface is flat and contains the anterior cerebellar notch which is wide & shallow and lodges the pons & MO; separated from them by the 4th ventricle
4. Major PartsThe cerebellum consists of two cerebellar hemispheres (H) joined at the midline in a constricted “worm-like” portion called the vermis which is divided into sup. & inf. parts. The ant.inf. parts of the cerebral hemispheres expand into spherical part called the cerebellar tonsils.HHHH
5. Cortex & White Matter
6. Cerebellar Nuclei (Lat. Med.)Don’t Eat Greasy FoodINTERPOSEDNUCLEI
7. Functional Zones
8. Functional Zones
9. Functional Zones
10. Fissures & LobesA primary fissure runs horizontally on the sup. surface & separates the ant. from the post. lobes. The part of the vermis ventral to the primary fissure is the superior vermis and the part dorsal to the fissure is the inferior vermis. A horizontal fissure runs horizontally in the post. lobe & separates the sup. from the post.inf. surfaces.
11. Fissures & LobesOn the ant.inf. surface, a post.lat. fissure separates the post. lobe from the flocculonodular lobe.
12. Fissures & Lobes
13. Functional Divisions
14. Connections
15. Connections
16. ConnectionsTHE CEREBELLUM Controls the IPSILATERAL SIDE OF THE BODY
17. Spinocerebellar Afferents (Uncrossed)Ventral spinocerebellar (double-crosser) From lower limbsDorsal spinocerebellar (Uncrossed) From trunk & lower limbsCuneocerebellar (Uncrossed) From thorax & Upper limb
18. Cerebral Afferents (Crossed)
19. Vestibulovisual Afferents (Uncrossed)
20. Cerebellar Efferents
21. Cerebellar Vasculature
22. Clinical Relevance