Facial colliculus

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Facial colliculus
Gray709.png
Rhomboid fossa. (Colliculus facialis labeled at center left.)
Human caudal brainstem posterior view description.JPG
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

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]

Contents

Anatomy

The 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

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. [1]

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. [1]

Additional images

References

  1. 1 2 3 4 Yoo, Hannah; Mihaila, Dana M. (2022), "Neuroanatomy, Facial Colliculus", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID   32310367 , retrieved 2023-01-01


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