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Pons - The abducens nerve(CN VI innervates an eye moving...

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Brain Stem Pons * The pons (L. bridge) is dominated by the massive, transversely oriented structure on its ventral surface called the basal pons it and looks like a bridge interconnecting the two cerebellar hemispheres. It does not , however, interconnect them. * Many of the fibres descending in a cerebral peduncle synapse in scattered pontine nuclei which acts as relay station that connects the motor cortex with the cerebellum concerning the coordination of voluntary movements. * These connections are made via the middle cerebellar peduncles The Entry and Exit of Cranial Nerves around the Pons * The trigeminal nerve (CN V-innervates the face and chewing muscles) enters the brainstem at the midpons . * Three other cranial nerves enter (or leave) along the groove between the basal pons and the medulla ;
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Unformatted text preview: * The abducens nerve (CN VI- innervates an eye moving muscle) is the smallest and most medially located of these three, exiting where the pyramid emerges from the basal pons ; * The facial nerve (CN VII- supplies muscles of facial expression) is farther lateral and consists of two parts : a larger and more medial motor root and a smaller sensory root (sometimes referred to as the intermediate nerve ); The Entry and Exit of Cranial Nerves around the Pons * The vestibulocochlear nerve (CN VIII) is slightly lateral to the facial nerve and also has two parts : a vestibular division and a more lateral cochlear division . * trochlear nerve (CN IV- innervate eye movement muscle) emerges from the dorsal surface of the brainstem between the junction of the pons and midbrain...
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