Changes

[[Cranial Nerves - Anatomy & Physiology|Cranial nerves]] III to XII exit from the brain stem and act to innervate parts of the head, neck, viscera and the thoracic and abdominal cavities. Although most of these nerves contain both sensory and motor fibres, the sensory fibres all have their cell bodies in ganglia outside the brain stem.  

[[Cranial Nerves - Anatomy & Physiology|Cranial nerves]] III to XII exit from the brain stem and act to innervate parts of the head, neck, viscera and the thoracic and abdominal cavities. Although most of these nerves contain both sensory and motor fibres, the sensory fibres all have their cell bodies in ganglia outside the brain stem.  

===Cerebellum Structure & Function===

===Cerebellum===

[[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 & Physiology#Dura_mater|'tentorium cerebelli']] but dorsal to the fourth 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. Its 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 & Physiology#Dura_mater|'tentorium cerebelli']] but dorsal to the fourth 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. Its 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'''.