The facial colliculus is an elevated area located in the pontine tegmentum (dorsal pons),[citation needed] 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.[1]
Facial colliculus | |
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![]() Rhomboid fossa. (Colliculus facialis labeled at center left.) | |
Human caudal brainstem posterior view (Colliculus facialis is #3) | |
Details | |
Identifiers | |
Latin | colliculus facialis |
NeuroNames | 624 |
TA98 | A14.1.05.705 |
FMA | 78480 |
Anatomical terms of neuroanatomy |
Anatomy
editThe facial colliculus occurs within the rhomboid fossa (i.e. the floor of the fourth ventricle) where it is placed lateral to its (midline) median sulcus.[1]
Structure
editThe 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.[1]
Clinical significance
editA facial colliculus lesion would result in ipsilateral facial paralysis (i.e. Bell's palsy) and inhibited ipsilateral and unopposed contralateral eye deviation.[1]
Additional images
edit-
Axial section of the brainstem (pons) at the level of the facial colliculus
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Fourth ventricle. Posterior view. Deep dissection.
References
editExternal links
edit- 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