The cheekbone (also cheekbone , cheekbones or Jugale ) ( Latin os zygomaticum , os jugale ) is a paired bones of the facial skeleton at the lateral edge of the eye sockets. The cheekbone derives the main chewing pressure that comes from the molars .
The three surfaces of the zygomatic bone
The zygomatic bone consists of three surfaces:
- The cheek surface ( facies lateralis or also facies malaris ; colloquially often referred to as " cheekbones ") is a convex bone plate that can be felt through the soft tissues of the face and has a bone opening, the foramen zygomaticofaciale , in its center . It is the starting point for the zygomaticus major and the zygomaticus minor muscle .
- The temporal surface ( Facies temporalis ) forms the concave inner surface of the zygomatic bone with the foramen zygomatico temporale as a bone opening. It falls downwards and towards the middle and forms the temporal fossa above and the infratemporal fossa below .
- The orbital surface ( facies orbitalis , sometimes also referred to as the orbital process) is a smooth bone surface that, together with the upper jaw and the sphenoid bone, forms part of the floor and the side wall of the eye socket . Approximately in the middle there is a bone opening, the zygomatic-orbitale foramen .
The three processes of the zygomatic bone
The zygomatic bone also has three processes:
- The frontal sphenoidal process ( processus frontalis , or processus frontosphenoidalis , more rarely processus frontosphenoideus ) points to the head and articulates with the processus zygomaticus of the frontal bone . The side edge of the eye socket is formed by it.
- The maxillary process ( maxillary process ) points forwards and to the side and articulates with the zygomatic process of the maxilla . The levator labii superioris muscle arises from it .
- The posterior temporal process ( processus temporalis ) forms the front part of the zygomatic arch ( arcus zygomaticus ) and articulates with the processus zygomaticus of the temporal bone , which also contributes to the formation of the zygomatic arch. The masseter muscle arises at the lower edge of the temporal process .
The zygomatic bone in birds
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