Inferior cerebellar peduncle
|Inferior cerebellar peduncle|
Scheme showing the connections of the several parts of the brain. (Inferior peduncle labeled at bottom right.)
Section of the medulla oblongata at about the middle of the olive. (Inferior peduncle labeled at upper right.
|Latin||pedunculus cerebellaris inferior|
|NeuroLex ID||Inferior cerebellar peduncle|
|Anatomical terms of neuroanatomy|
The upper part of the posterior district of the medulla oblongata is occupied by the inferior cerebellar peduncle (restiform body), a thick rope-like strand situated between the lower part of the fourth ventricle and the roots of the glossopharyngeal and vagus nerves.
The inferior cerebellar peduncle carries many types of input and output fibers that are mainly concerned with integrating proprioceptive sensory input with motor vestibular functions such as balance and posture maintenance. It consists of the following fiber tracts entering cerebellum:
- Posterior spinocerebellar tract: unconsciouness proprioceptive information from the lower part of trunk and lower limb. This tract originate at the ipsilateral Clarke's nucleus (T1-L1) and travel upward to reach inferior cerebellar peduncle and synapses within the spinocerebellum (also known as the paleocerebellum).
- Cuneocerebellar tract: unconsciousness proprioceptive information from the upper limb and neck. This tract originate at ipsilateral accessory cuneate nucleus and travel through inferior cerebellar peduncle to reach spinocerebellum part of cerebellum.
- Trigeminocerebellar tract: unconsciousness proprioceptive information from the face.
- Olivocerebellar tract: "error signal" in movement originate from the cerebral cortex and spinal cord. This tract originate at contralateral inferior olivary nucleus and enter cerebellum as climbing fiber.
- Vestibulocerebellar tract: vestibular information projects onto the vestibulocerebellum (also known as the archicerebellum).
- Atlas image: n2a5p2 at the University of Michigan Health System
- Atlas image: n2a7p4 at the University of Michigan Health System
- Illustration and text: cere/text/p1/icp.htm at the University of Wisconsin-Madison Medical school