The superior cerebellar peduncles (brachia conjunctiva), two in number, emerge from the upper and medial part of the white matter of the hemispheres and are placed under cover of the upper part of the cerebellum.
Below, they form the upper lateral boundaries of the fourth ventricle, but as they ascend they converge on the dorsal aspect of the ventricle and thus assist in roofing it in.
All fibers (except vestibular fibers to the vestibular nuclei through the inferior cerebellar peduncle) carrying information from the spinal cord to the cerebellum (ventral spinocerebellar tract) pass through the superior cerebellar peduncles.
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