middle cerebellar peduncle
{{Short description|Structure in the brain connecting the pons to the cerebellum}}
{{Infobox brain
| Name = Middle cerebellar peduncle
| Latin = pedunculus cerebellaris medius
| Image = Gray705.png
| Caption = Dissection showing the projection fibers of the cerebellum. (Middle peduncle labeled at upper right.)
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The middle cerebellar peduncle (or brachium pontis{{Cite book |last=Patestas |first=Maria A. |title=A Textbook of Neuroanatomy |last2=Gartner |first2=Leslie P. |date= |publisher=Wiley-Blackwell |year=2016 |isbn=978-1-118-67746-9 |edition=2nd |location=Hoboken, New Jersey |pages=290}}) is one of three paired cerebellar peduncles connecting the brainstem to the cerebellum. The connection is from the pons. It connects the pons to the cerebellum, with fibres originating from the pontine nuclei, and travelling to the opposite cerebellar hemisphere. It is supplied by the anterior inferior cerebellar artery (AICA) and branches from the basilar artery. It conveys information from the cerebrum and the pons to the cerebellum.
Structure
The middle cerebellar peduncle is the largest of the three cerebellar peduncles. It connects the pons and cerebellum. It consists almost entirely of fibers passing from the pons to the cerebellum (fibrocerebellar fibers); the fibers arise from the pontine nuclei and decussate within the pons before entering the peduncle to end in the contralateral cerebellar hemisphere.{{Cite book |last1=Voogd |first1=Jan |title=The Human Nervous System |last2=Ruigrok |first2=Tom J. H. |publisher=Academic Press |year=2012 |isbn=978-0-12-374236-0 |edition=3rd |pages=471–545 |language=en |chapter=15 - Cerebellum and Precerebellar Nuclei |doi=10.1016/B978-0-12-374236-0.10015-X |chapter-url=https://www.sciencedirect.com/science/article/pii/B978012374236010015X}}
The trigeminal nerve (CN V) arises from the lateral pons very close to the middle cerebellar peduncle.{{Cite book|last=Franklin|first=S.|chapter-url=https://www.sciencedirect.com/science/article/pii/B9780128023815000075|title=Conn's Translational Neuroscience|publisher=Academic Press|year=2017|isbn=978-0-12-802381-5|pages=113–129|language=en|chapter=5 - The Peripheral and Central Nervous System|doi=10.1016/B978-0-12-802381-5.00007-5}}
= Blood supply =
The middle cerebellar peduncle is supplied by the anterior inferior cerebellar artery (AICA), as well as smaller branches from the basilar artery.{{Cite book|last=DeMyer|first=William|url=https://www.sciencedirect.com/science/article/pii/B9780750674188000021|title=Stroke in Children and Young Adults|publisher=Saunders|year=2009|isbn=978-0-7506-7418-8|edition=2nd|pages=15–68|language=en|doi=10.1016/B978-0-7506-7418-8.00002-1}}
Clinical significance
Infarction of the anterior inferior cerebellar artery (AICA) can damage the middle cerebellar peduncle. Diffuse intrinsic pontine glioma may spread from the pons into the middle cerebellar peduncle.{{Cite book|last1=Vitanza|first1=Nicholas A.|chapter-url=https://www.sciencedirect.com/science/article/pii/B9780323371018001284|title=Swaiman's Pediatric Neurology|last2=Fisher|first2=Paul G.|last3=Deisseroth|first3=Michelle Monje|publisher=Elsevier|year=2017|isbn=978-0-323-37101-8|edition=6th|pages=991–994|language=en|chapter=128 - Diffuse Intrinsic Pontine Glioma|doi=10.1016/B978-0-323-37101-8.00128-4}}
Additional images
File:Gray677.png|Scheme showing the connections of the several parts of the brain.
File:Gray682.png|Superficial dissection of brain-stem. Lateral view.
File:Gray719.png|Hind- and mid-brains; postero-lateral view.
File:Gray792.png|Upper part of medulla spinalis and hind- and mid-brains; posterior aspect, exposed in situ.
File:Gehirn, basal - beschriftet lat.svg|Basal view of a human brain
File:Human brainstem-thalamus posterior view description.JPG|Dissection of human midbrain with middle cerebellar peduncle labeled.
File:Lower pons horizontal KB.svg|Cross section through lower pons showing part of the middle cerebellar peduncle (#19) forming from the convergence of pontocerebellar fibers.
File:Slide8dd.JPG|Middle cerebellar peduncle
File:Slide2cuc.JPG|Cerebrum. Deep dissection. Inferior dissection.
File:Slide2PITER.JPG|Fourth ventricle. Posterior view.Deep dissection.
File:Slide2MIR.JPG|Cerebrum.Inferior view.Deep dissection.
File:Slide3MIR.JPG|Cerebrum.Inferior view.Deep dissection.
File:Slide4MIR.JPG|Cerebrum.Inferior view.Deep dissection.
File:Slide2SEER.JPG|Cerebellum. Inferior surface.
File:Slide3EER.JPG|Cerebellum. Inferior surface.
File:Slide4SER.JPG|Cerebellum. Inferior surface.
See also
References
{{Gray's}}
External links
- {{UMichAtlas|n2a7p4}}
{{Pons}}
{{Cerebellum}}
{{Neural tracts}}
{{Portal bar|Anatomy}}
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