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===Cerebellum Structure & Function===

===Cerebellum Structure & Function===

[[Image:braincerebellumarrow.jpg|thumb|right|150px|The location of the cerebellum. Image courtesy of BioMed Archive]]

[[Image:braincerebellumarrow.jpg|thumb|right|150px|The location of the cerebellum. Image courtesy of BioMed Archive]]

The cerebellum is located in the caudal part of the cranial cavity and is caudal to the [[Meninges_-_Anatomy_%26_Physiology#Dura_mater|'tentorium cerebelli']] but dorsal to the forth ventricle. Its gross structure is made up of a central 'Vermis' surrounded by two lateral hemispheres. It is attached to the brain stem via three pairs of 'peduncles'; a rostral pair to the midbrain, a middle pair to the pons and a caudal pair to the medulla oblongata. It internal structure is composed of a cerebellar cortex which is made up of fissures on the surface that divide into lobules and then further sub divide into 'folia' or leaves. There are white matter fibres running to and from this cortex, also called '''arbor vitae'''. Within the cerebellum there are various nuclei including the dentate, interpositus and the fastigial.

The cerebellum is located in the caudal part of the cranial cavity and is caudal to the [[Meninges_-_Anatomy_%26_Physiology#Dura_mater|'tentorium cerebelli']] but dorsal to the forth ventricle. Its gross structure is made up of a central 'Vermis' surrounded by two lateral hemispheres. It is attached to the brain stem via three pairs of 'peduncles'; a rostral pair to the midbrain, a middle pair to the pons and a caudal pair to the medulla oblongata. It's internal structure is composed of a cerebellar cortex which is made up of fissures on the surface that divide into lobules and then further sub divide into 'folia' or leaves. There are white matter fibres running to and from this cortex, also called '''arbor vitae'''. Within the cerebellum there are various nuclei including the dentate, interpositus and the fastigial.

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The generalised function of the cerebellum is to receive information regarding any movement in progress or any intended movement via inputs from the muscles, vestibular system and motor centres of the pyramidal and extrapyramidal systems.The most important function of the cerebellum is to minimise the difference between the intended and the actual movements. The cerebellum then projects corrections regarding these movements to all motor centres of the brain via feed-back circuits between the pyramidal and extrapyramidal systems. It should be noted that the cerebellum cannot initiate movement.

The generalised function of the cerebellum is to receive information regarding any movement in progress or any intended movement via inputs from the muscles, vestibular system and motor centres of the pyramidal and extrapyramidal systems. The most important function of the cerebellum is to minimise the difference between the intended and the actual movements. The cerebellum then projects corrections regarding these movements to all motor centres of the brain via feed-back circuits between the pyramidal and extrapyramidal systems. It should be noted that the cerebellum cannot initiate movement.

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