inferior cerebellar peduncle (restiform body)

Structure

the inferior cerebellar peduncle consists of:

• restiform body (larger lateral bundle)
  • crossed fibers from the inferior olive*
  • fibers from the dorsal spinocerebellar tract
  • fibers from the lateral reticular nucleus
  • fibers from the accessory cuneate nucleus
  • fibers from the paramedian reticular nuclei
  • fibers from the perihypoglossal nuclei
  • fibers from other nuclei
• juxtarestiform body (smaller medial bundle)
  • vestibular fibers

* a few fibers from the dentate nucleus of the cerebellum project to the inferior olivary nucleus

Origin

• fibers originate from spinal neurons & medullary relay nuclei.

Efferents

• the most inferior of the 3 large paired bundles carrying nerve fibers to the cerebellum (cerebellar input)

Course

• fibers develop on the dorsolateral surfaces of the upper medulla.
• they pass under the lateral recesses of the rhomboid fossa & curve dorsomedially into the cerebellum caudally & medially to the middle cerebellar peduncle

More general terms

• cerebellar peduncle