Facial colliculus

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Brain: Facial colliculus
Rhomboid fossa. (Colliculus facialis labeled at center left.)
Human caudal brainstem posterior view (Colliculus facialis is #3)
Latin	colliculus facialis
Gray's	p.799
NeuroNames	hier-621

The facial colliculus is an elevated area located on the dorsal pons in the floor of the 4th ventricle. It is formed by fibers from the motor nucleus of the facial nerve as they loop over the abducens nucleus. Thus a lesion to the facial colliculus would result in ipsilateral facial paralysis and ipsilateral unopposed eye medial deviation.

Additional images

Axial section of the Brainstem (Pons) at the level of the Facial Colliculus
Fourth ventricle. Posterior view.Deep dissection.

External links

Human brain, rhombencephalon, metencephalon: pons (TA A14.1.05.101–604, GA 9.785)

Dorsal/
(tegmentum)

Surface

White: Sensory/ascending

MLF, III, IV and VI: Vestibulo-oculomotor fibers

White: Motor/descending

Grey: Cranial nuclei

afferent:	GSA: Principal V/Spinal V VIII-c Dorsal Anterior VIII-v Superior

efferent:	SVE: Motor V VII GSE: VI GVE: VII: Superior salivary nucleus

Other grey

Ventral/
(base)

Grey	Pontine nuclei

White: Motor/descending	Corticospinal tract Corticobulbar tract Corticopontine fibers MCP Pontocerebellar fibers

Surface	Basilar sulcus

Other grey: Raphe/
reticular

M: CNS

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

Ventricular system, rhombencephalon, met- and myel-: fourth ventricle (TA A14.1.05.701–726, GA 9.797)

Roof (dorsal)

rostral:	Superior medullary velum (Frenulum)

caudal:	Inferior medullary velum Taenia of fourth ventricle

Floor/rhomboid fossa (ventral)

rostral (pons):	Facial colliculus Locus coeruleus

caudal (medulla}:	Vagal trigone Hypoglossal trigone Area postrema Obex

Medial eminence Sulcus limitans

Apertures

Other

M: CNS

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

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