The facial colliculus is a small bump on the floor of the fourth ventricle in the pons. It is made by facial nerve fibres looping around the abducens nucleus.
| Location | Floor of the fourth ventricle (rhomboid fossa), pontine part, beside the midline |
|---|---|
| Parts |
|
| Connections | |
| Blood Supply | Basilar artery (pontine branches) |
A surface landmark marking where facial nerve fibres curve over the abducens nucleus.
A small lesion here (stroke, multiple sclerosis or tumour) causes the facial colliculus syndrome: weakness of the face and inability to look outward on the same side.
Same-side facial palsy and horizontal gaze palsy from a lesion in the dorsal pons.
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