Juxtarestiform body explained

Juxtarestiform body
Latin:	Corpus juxtarestiforme

The juxtarestiform body is the smaller, medial subdivision of each inferior cerebellar peduncle (the other, lateral one being the restiform body).^[1]

The juxtarestiform body contains mostly cerebellar afferents, but also some cerebellar efferents.

Anatomy

Afferents

• Vestibulocerebellar fibers: include second-order fibers from the vestibular nuclei (project bilaterally) as well as a few first-order fibers from the vestibular ganglion/nerve (project ipsilaterally). The fibers project to the vestibulocerebellum and cerebellar vermis (of the spinocerebellum) as well as to (ipsilateral and contralateral) fastigial and dentate nuclei.

Efferents

• Cerebellovestibular fibers: arise from Purkinje cells of the flocculonodular cerebellar cortex.
  • Fastigiovestibular fibers: mainly project to both ipsilateral and contralateral lateral and inferior vestibular nuclei to influence both vestibulospinal tracts.
  • Fastigiobulbar fibers: project bilaterally to the (medullary and pontine) reticular formation to influence both reticulospinal tracts (but mostly the contralateral one).
• Cerebelloreticular fibers

Function

The juxtarestiform body coordinates balance and eye movements by communication between the vestibular apparatus and the cerebellum.

See also

• Inferior cerebellar peduncle
• Flocculonodular lobe
• Fastigial nucleus

Notes and References

1. Book: Patestas, Maria A. . A Textbook of Neuroanatomy . Gartner . Leslie P. . Wiley-Blackwell . 2016 . 978-1-118-67746-9 . 2nd . Hoboken, New Jersey .