Zygomatic bone

Zygomatic bone: Anatomy & FunctionKey facts about the anatomy of the zygomatic bone.
~ 3 min

We are now going to examine the zygomatic bone (os zygomaticum). It is a paired bone, which is a connection between the neurocranium and the viscerocranium.

Zygomatic bone (os zygomaticum)
Zygomatic bone (os zygomaticum)

It has the following surfaces:

  • lateral surface (facies lateralis)

    Lateral surface (facies lateralis)
    Lateral surface (facies lateralis)
  • orbital surface (facies orbitalis)

Orbital surface (facies orbitalis)
Orbital surface (facies orbitalis)
  • temporal surface (facies temporalis)

    Temporal surface (facies temporalis)
    Temporal surface (facies temporalis)

    There are also two processes that are derived from the bone:

  • frontal process (processus frontalis)

    Frontal process (processus frontalis)
    Frontal process (processus frontalis)
  • temporal process (processus temporalis)

    Temporal process (processus temporalis)
    Temporal process (processus temporalis)

    On the orbital surface is the zygomatico-orbital foramen (foramen zygomaticoorbitale), which extends into the canal.

    Zygomatico-orbital foramen (foramen zygomaticoorbitale)
    Zygomatico-orbital foramen (foramen zygomaticoorbitale)

    This canal splits and opens with two foramina:

  • On the lateral surface, there is the zygomaticofacial foramen (foramen zygomaticofaciale), in which the zygomatic nerve passes.

    Zygomaticofacial foramen (foramen zygomaticofaciale)
    Zygomaticofacial foramen (foramen zygomaticofaciale)
  • On the temporal surface, there is the zygomaticotemporal foramen (foramen zygomaticotemporale), in which the zygomaticotemporal nerve passes.

Zygomaticotemporal foramen (foramen zygomaticotemporale)
Zygomaticotemporal foramen (foramen zygomaticotemporale)

The frontal process is connected to the zygomatic process of the frontal bone. The frontal process has a small eminentia orbitalis (eminentia orbitalis).

Eminentia orbitalis (eminentia orbitalis)
Eminentia orbitalis (eminentia orbitalis)

There is a marginal tubercle (tuberculum marginale) in the area of the posterior border of the process.

Marginal tubercle (tuberculum marginale)
Marginal tubercle (tuberculum marginale)

The temporal process is connected to the zygomatic process of the temporal bone, forming the zygomatic arch (arcus zygomaticus).

Zygomatic arch (arcus zygomaticus)
Zygomatic arch (arcus zygomaticus)
Dictionary

Zygomatic bone

zygomatic bone
os zygomaticum
lateral surface
facies lateralis
orbital surface
facies orbitalis
temporal surface
facies temporalis
frontal process
processus frontalis
temporal process
processus temporalis
zygomatico-orbitalforamen
foramenzygomaticoorbitale
zygomaticofacial foramen
foramen zygomaticofaciale
zygomaticotemporalforamen
foramenzygomaticotemporale
eminentia orbitalis
eminentia orbitalis
marginal tubercle
tuberculum marginale
zygomatic arch
arcus zygomaticus
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