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Overview. Problems. Contents. Anatomy. Point: 18. Superior cerebellar peduncle. Function: Principle efferent (out of) pathway of the cerebellum. Plays a major role in the coordination of the IPSI. arm and leg.esion of the superior cerebellar peduncle CAUDAL to the decussation will result in motor incoordination on the IPSI. side of the body, whereas a lesion that occurs ROSTRAL to the decussation results in CONTRA. motor incoordination of the arm and leg. Other Note: REMEMBER THAT CEREBELLAR LESIONS RESULT IN IPSI.
This region of the pons also contains the pontine nuclei, which give rise to the axons that transmit to the opposing cerebellar hemisphere, and do this via the middle cerebellar peduncle (via the transverse pontine fibres). Pontine Tegmentum-The posterior part of the pons is known as the tegmentum. The dorsal surface of this region forms the floor of the fourth ventricle. The superior cerebellar peduncle consists mainly of efferent fibers from the cerebellum to the thalamus.