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In the human skull, the zygomatic bone (from Ancient Greek: ζῠγόν, romanized: zugón, lit. 'yoke'), also called cheekbone or malar bone , is a paired irregular bone , situated at the upper and lateral part of the face and forming part of the lateral wall and floor of the orbit , of the temporal fossa and the infratemporal fossa .
The jugal bone is located on either side of the skull in the circumorbital region. It is the origin of several masticatory muscles in the skull. [1] The jugal and lacrimal bones are the only two remaining from the ancestral circumorbital series: the prefrontal, postfrontal, postorbital, jugal, and lacrimal bones.
The zygomatic processes (aka. malar) are three processes (protrusions) from other bones of the skull which each articulate with the zygomatic bone. The three processes are: [1] Zygomatic process of frontal bone from the frontal bone; Zygomatic process of maxilla from the maxilla; Zygomatic process of temporal bone from the temporal bone
The zygomaticofacial nerve (or zygomaticofacial branch of zygomatic nerve or malar branch of zygomatic nerve [citation needed]) is a cutaneous branch of the maxillary nerve (CN V 2) that arises within the orbit. [1]
The zygomatic nerve is a branch of the maxillary nerve (itself a branch of the trigeminal nerve (CN V)). It arises in the pterygopalatine fossa and enters the orbit through the inferior orbital fissure before dividing into its two terminal branches: the zygomaticotemporal nerve and zygomaticofacial nerve .
Zygomatic (from Greek ζύγωμα (zygōma), "yoke") may refer to: Zygomatic arch; Zygomatic bone; Zygomatic branches of the facial nerve; Zygomaticus major muscle; Zygomaticus minor muscle; Zygomatic nerve; Zygomatic process. Zygomatic process of frontal bone; Zygomatic process of maxilla; Zygomatic process of temporal bone
The zygomaticus major muscle raises the upper lip to bare the upper teeth. It additionally deepens and raises the nasolabial furrow. Acting in conjunction with other muslces of facial expression that elevate the lip, it curls the upper lip to produce facial expressions such as smiling, disdain, contempt, or smugness.
The Facial Action Coding System (FACS) is a system to taxonomize human facial movements by their appearance on the face, based on a system originally developed by a Swedish anatomist named Carl-Herman Hjortsjö. [1] It was later adopted by Paul Ekman and Wallace V. Friesen, and published in 1978. [2]