Zygomaticofacial nerve: sensation of the cheekbone
Quick facts
- Origin
- Branch of the zygomatic nerve, which comes from the maxillary nerve (V2).
- Function
- Sensory: skin of the malar prominence.
- Exit
- Through the zygomaticofacial foramen, in the zygomatic bone.
- Partner
- Zygomaticotemporal, which exits the same bone and supplies the anterior temple.
The zygomaticofacial nerve is a small sensory branch that carries the sensations of touch, pain and temperature to the skin over the malar prominence (the "apple of the cheek"). It comes from the zygomatic branch of the maxillary nerve (V2), one of the divisions of the trigeminal.
Where does it exit?
The zygomatic branch enters the orbit and divides in two. One of them, the zygomaticofacial, passes through the zygomatic bone via a small canal and emerges on the face through the zygomaticofacial foramen, in the anterolateral part of the bone. From there it crosses the orbicularis oculi muscle and spreads across the skin of the malar region. The other branch, the zygomaticotemporal, continues to the anterior temple.
| Branch | Exit | Territory |
|---|---|---|
| Zygomaticofacial | Foramen in the body of the zygomatic bone | Skin of the malar prominence |
| Zygomaticotemporal | Foramen in the lateral wall of the orbit | Skin of the anterior temple |
| Infraorbital | Infraorbital foramen of the maxilla | Lower eyelid, side of the nose, upper lip |
The zygomaticofacial area borders and overlaps that of the infraorbital nerve, so patients do not always locate malar numbness precisely.
Why does it matter in facial harmonization?
The cheekbone and the zygomatic region are among the most planned areas in harmonization. Deep structures such as the prezygomatic space and the zygomatic ligament define the local anatomy, and the skin receives its sensory supply from the zygomaticofacial nerve. This shows up in three practical points:
- Post-procedure numbness: swelling and bruising in the malar region can compress sensory branches and leave the cheek skin "asleep" for days to weeks. Guidance to the patient should come beforehand, so they do not think it is a sequela.
- Medical history: prior surgery of the arch or zygomatic bone, fractures and implants alter the sensation and anatomy of the region.
- Anesthesia: superficial infiltrations in the cheekbone can anesthetize the branch and cause a sensation of local numbness.
When to worry?
Altered sensation lasting weeks, intense pain or associated movement asymmetry deserve reassessment. The zygomaticofacial nerve is sensory and does not control movement. If the patient has difficulty moving the face, the reasoning should turn to the facial nerve.
Also called: zygomaticofacial branch, nervus zygomaticofacialis.
Frequently asked questions
Is the zygomaticofacial nerve visible or palpable?
No. It is a thin nerve that passes through the bone and branches into the skin. Its importance lies in anatomical review and in interpreting numbness in the malar region.