facial colliculus
{{Short description|Elevated area of the brainstem}}
{{Technical|date=May 2025}}
{{Infobox brain
| Name = Facial colliculus
| Latin = colliculus facialis
| Image = Gray709.png
| Caption = Rhomboid fossa. (Colliculus facialis labeled at center left.)
| Image2 = Human caudal brainstem posterior view description.JPG
| Caption2 = Human caudal brainstem posterior view (Colliculus facialis is #3)
| IsPartOf =
| Components =
| Artery =
| Vein =
}}
The facial colliculus is an elevated area located in the pontine tegmentum (dorsal pons),{{Citation needed|date=January 2023}} within the floor of the fourth ventricle (i.e. the rhomboid fossa). It is formed by fibres from the facial motor nucleus looping over the abducens nucleus. The facial colliculus is an essential landmark of the rhomboid fossa.{{Citation |last=Yoo |first=Hannah |title=Neuroanatomy, Facial Colliculus |date=2022 |url=http://www.ncbi.nlm.nih.gov/books/NBK555907/ |work=StatPearls |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=32310367 |access-date=2023-01-01 |last2=Mihaila |first2=Dana M.}}
Anatomy
= Structure =
The facial colliculus is formed by brachial motor nerve fibres of the facial nerve (CN VII) looping over the (ipsilateral) abducens nucleus, forming a bump upon the surface.
Clinical significance
A facial colliculus lesion would result in ipsilateral facial paralysis (i.e. Bell's palsy) and inhibited ipsilateral and unopposed contralateral eye deviation.
Additional images
File:Pons section at facial colliculus.png|Axial section of the brainstem (pons) at the level of the facial colliculus
File:Slide2PITER.JPG|Fourth ventricle. Posterior view. Deep dissection.
References
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External links
- http://www.med.yale.edu/caim/cnerves/cn6/cn6_2.html
- https://web.archive.org/web/20130930042036/http://www.neuroanatomy.wisc.edu/virtualbrain/BrainStem/14CNVII.html
- https://web.archive.org/web/20070927162218/http://www.ib.amwaw.edu.pl/anatomy/atlas/image_04be.htm
{{Pons}}
{{Ventricular system}}
{{Authority control}}
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