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Related to olivary nucleus: Fastigial nucleus, Nucleus cuneatus
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A focal, hyperintense, nonenhancing lesion and enlargement of the olivary nucleus with a coexisting pontine lesion suggest an injury of the dentato-rubro-olivary pathway, findings that are consistent with hypertrophic olivary degeneration).
At any given time following a primary brainstem injury, there may be focal enlargement rather than atrophy of the inferior olivary nucleus.
The red nucleus and the ipsilateral inferior olivary nucleus are connected via the central tegmental tract, and the dentate nucleus connects to the contralateral red nucleus through the superior cerebellar peduncle.