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Gray, Henry. 1918. Anatomy of the Human Body. Page 183 The squamosal suture arches backward from the pterion and connects the temporal squama with the lower border of the parietal: this suture is continuous behind with the short, nearly horizontal parietomastoid suture, which unites the mastoid process of the temporal with the region of the mastoid angle of the parietal. The zygomatic arch is formed by the zygomatic process of the temporal and the temporal process of the zygomatic, the two being united by an oblique suture; the tendon of the Temporalis passes medial to the arch to gain insertion into the coronoid process of the mandible. The zygomatic process of the temporal arises by two roots, an anterior, directed inward in front of the mandibular fossa, where it expands to form the articular tubercle, and a posterior, which runs backward above the external acoustic meatus and is continuous with the supramastoid crest. www.bartleby.com /107/pages/page183.html   (684 words)

[No title] trismus accompanies zygomatic fractures in approximately one third of cases and is due either to impingement of the translating coronoid process or a muscle spasm secondary to impingement of the displaced fragments 4. epistaxis is unilateral in 30 - 50% of unilateral zygomatic injuries and is due to tearing of the maxillary sinus mucosa b. the fascia is incised and a periosteal elevator is advanced inferiorly until the medial surface of the arch and temporal surface of the zygomatic body are identified iii. www.utmb.edu /oto/Grand_Rounds_Earlier.dir/Zygomatic_Fx_1994.txt   (2778 words)

II. Osteology. 5b. 4. The Zygomatic Bone. Gray, Henry. 1918. Anatomy of the Human Body. The zygomatic bone is small and quadrangular, and is situated at the upper and lateral part of the face: it forms the prominence of the cheek, part of the lateral wall and floor of the orbit, and parts of the temporal and infratemporal fossæ (Fig. Near the center of this surface is the zygomaticotemporal foramen for the transmission of the zygomaticotemporal nerve. The structures attached to this tubercle are: (1) the check ligament of the Rectus lateralis; (2) the lateral end of the aponeurosis of the Levator palpebræ superioris; (3) the suspensory ligament of the eye (Lockwood); and (4) the lateral extremities of the superior and inferior tarsi. www.bartleby.com /107/40.html   (769 words)

Palaeos Vertebrates: Glossary W-Z Zygomatic arch: the arch running under the orbit and temporal fenestra in synapsids. Zygomatic plate: The zygomatic process of the maxillary bone when this process is in the form of a thin plate. Zygomatic process -A process of either the maxillary or squamosal bone that contributes to the formation of the zygomatic arch. www.palaeos.com /Vertebrates/Lists/Glossary/GlossaryWZ.html   (970 words)

CMF Hyperguide | Adult Cranio-Maxillofacial Trauma | Midface and Upper Facial Fractures   (Site not responding. Last check: 2007-10-20) Zygomatic complex fractures are also termed "tripod" fractures because they are breaks along the zygomaticofrontal, zygomaticomaxillary junction (infraorbital rim and anterior sinus wall), and the zygomatic arch. Isolated zygomatic arch fractures are usually due to a focused blow, such as an elbow or a hardball, directly to the mid-arch. Arch fractures can be approached through a limited lateral brow incision with blunt dissection down to the supraperiosteal plane, or via a Gillies' (2.5-mm oblique temporal hairline) incision, avoiding the superficial temporal artery. www.cmf.hyperguides.com /tutorials/adult/upper_frx/overview.asp   (10126 words)

Review of Ophthalmology The periosteum must be released at least to the mid-point of the arch, and optimally to the lateral one-third junction of the arch adjacent to the zygomatic temporal suture. After the periosteum is lifted off the arch, you’ll see the aponeurosis of the masseteric muscle, identifying it as a striated fibrous band emanating from the inferior edge of the zygomatic arch (See Figure 2). The periosteal attachments over the arch and the attachments of the masseteric aponeurosis and ligaments on the vertical medial edge of the masseteric fascia are critical in the success or failure of the surgery. www.revophth.com /index.asp?page=1_296.htm   (2335 words)

Dorlands Medical Dictionary one of the cartilaginous structures surrounding the embryonic spinal cord, formed by the dorsad growth of the dorsolateral arcualia; it is the primordium of the vertebral arch. the arch formed by the roof of the mouth from the teeth on one side of the maxilla to the teeth on the other or, if the teeth are missing, from the residual dental arch on one side to that on the other. an inconstant, rudimentary arch of the embryo, supposed to explain the origin of certain occasionally occurring vessels between the fourth aortic and the pulmonary arch. www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_a_57zPzhtm   (1694 words)

Highbeam Encyclopedia - Search Results for Arch Triumphal arches were originally built by the Romans to commemorate specific victories, and in imperial times only emperors could pass through them. the arch of the rainbow synonyms : arc, bow, curve, semicircle; curvature, convexity. zygomatic arch (zygoma) The bone at the side of the skull which forms an arch from beneath the orbit to a position toward the back of the head. www.encyclopedia.com /SearchResults.aspx?Q=Arch&StartAt=1   (691 words)

Endoscopic Forehead and Facelift: Step By Step The elevation of the periosteum off the zygomatic arch early on assures the protection of the frontal branch of the facial nerve. Dissection is proceeded laterally toward the zygomatic arch and the lateral orbital rim. When you approach the zygomatic arch, three veins, the middle one accompanied by the small artery and the zygomaticotemporal nerve branches, are found. www.ramirezmd.com /endofacelift/proc2.html   (983 words)

Ontogeny of bone strain: the zygomatic arch in pigs -- Herring et al. 208 (23): 4509 -- Journal of Experimental Biology strain in the zygomatic arch of 4-week-old weanling piglets. The zygomatic arch, consisting of zygomatic (Z) and squamosal (Sq) bones, and the masseter muscle (Mass) in (A) a 3.5-week-old piglet and (B) a 3.5-month-old juvenile pig, both domestic farm animals. feeding strains on the zygomatic arch of weanling pigs are not jeb.biologists.org /cgi/content/full/208/23/4509   (5889 words)

The Nature Institute - What Forms an Animal? In contrast, the wild animal's arch is narrower and has one concave and one convex surface that meet at the top of the arch, forming a sharp ridge. The zygomatic arch remolds to form a sharp ridge of compact bone as the ideal attachment for the masseter muscle. In contrast, the rounded, smooth zygomatic arch and mandible in the zoo-reared lions reveals a lack of activity. natureinstitute.org /pub/ic/ic6/lionskulls.htm   (1930 words)

face & mandible The zygomaticotemporal suture, normally present in the mid-portion of the arch, may be visible as a smooth, short alteration in contour of the arch. The lateral projection of the face shows the orbital roofs, floors, and lateral rims, the pterygoid bones, posterior antral walls and the interposed pterygomaxillary fissure, the margins of the zygomatic recesses, the hard palate and its parallel relationship to the planum sphenoidale. fct02) should show the same structures identified at the lower plane and, in addition, the zygomatic process of the zygomatic arch; the pterygomaxillary fissure separating the posterior wall of the antrum and the pterygoid bone; the mandibular condyle; and the base of the styloid processes. www.uth.tmc.edu /radiology/test/er_primer/face/facetxt.html   (3680 words)

Midface Fractures (Apr.1996) Digital exam of the oral cavity is mandatory and may reveal discontinuities in the alveolar arch, or tenderness at the maxillary tuberosities indicating as seen in Lefort I and zygomatic complex fractures. The arch bar of the maxilla is suspended from the pyriform, zygomatic arch, the orbital rims, or extraskeletally to a halo in patients who have extensive facial comminution. The temporal fat pad is encountered and followed down to the zygomatic arch, reflecting the temporal fascia laterally and thus preventing injury to the frontal branch of the facial nerve. www.utmb.edu /otoref/Grnds/midface.htm   (7145 words)

Wolf Anatomy and Behaviour All three skulls observed displayed the same overall shape: an elongated braincase in the rear with sagittal and occipital crests; sharply pointed postorbital processes; high, wide zygomatic arches; paired infraorbital foramina just posterior to a sudden narrowing of the skull at the muzzle; wide, deep nasal cavities with turbinate bones; and large, frontally oriented orbits. The skull was formed by a number of fused plates (basisphenoid, palatine, zygomatic ventrally; parietal, frontal, temporal, maxilla dorsally), which were roughly correspondent between skulls. The zygomatic arch was formed by two bones: the jugal process of the maxilla and a process of the temporal bone. www.soappuppy.com /wolf/skull.html   (938 words)

CHAPTER 48: THE PAROTID, TEMPORAL AND INFRATEMPORAL REGIONS The parotid gland lies inferior to the zygomatic arch, anteroinferior to the external acoustic meatus, anterior to the mastoid process, and posterior to the ramus of the mandible. Its tendon passes deep to the zygomatic arch to reach the coronoid process of the mandible. A parasympathetic root from the greater petrosal nerve and the nerve of the pterygoid canal conveys preganglionic fibers from the facial nerve. www.dartmouth.edu /~humananatomy/part_8/chapter_48.html   (3712 words)

Bone Strain Patterns of the Zygomatic Complex in Response to Simulated Orthopedic Forces -- Oberheim and Mao 81 (9): ... Lateral surface of the zygomatic arch: upward histograms representing tensile bone strain. Medial surface of the zygomatic arch: downward histograms representing compressive strain. medial surfaces of the zygomatic arch, tensile strain in the jdr.iadrjournals.org /cgi/pmidlookup?view=full&pmid=12202641   (3178 words)

eMedicine - Facial Trauma, Zygomatic Arch Fractures : Article by Adam J Cohen, MD   (Site not responding. Last check: 2007-10-20) Relevant Anatomy: The zygomatic arch is an integral and principal constituent of the midfacial skeleton. The arch endows a rim of bony armor to the temporalis muscle and the coronoid process of the mandible and serves as the masseter muscle origin. Repair of the zygomatic arch is usually performed in concert with repair of ZMC fracture stabilization. www.emedicine.com /plastic/topic484.htm   (2828 words)

Under-eye light absorbing device and method - Patent 4719909 A device according to claim 1, wherein said patch is generally kidney shaped in outline and of a length and width for generally conforming to the shape of the zygomatic arch skin area to which applied, with a concavely arched edge on the patch for disposition adjacent to the eye socket formation along the orbit. This invention relates to a new and improved means and method for avoiding reflection into the eyes of incident light rays from the skin areas on the zygomatic arches along the lower side of the orbit, such areas being often referred to as the cheekbones. The present invention also provides a method of absorbing incident light from the zygomatic arch skin area along the lower side of the orbit, and comprising applying a light absorbing pliable sheet material patch to such skin area, and adhesively attaching the patch to such skin area. www.freepatentsonline.com /4719909.html   (1870 words)

THE SKULL The zygomatic arch springs from this region to join the zygomatic bone (cheek bone). One spur rises to the zygomatic process of the frontal bone and forms the outer rim of the orbit. A second spur meets the zygomatic arch and the third reaches towards the nose forming the lower rim of the orbit. home.comcast.net /~barbbranham/skull.htm   (1000 words)

Chiseling This arched bone allows muscle formation to adhere to it and it is this muscle that joins the jaws and head together and gives them strength. By having a Zygomatic that lies close to the head, both the head width is kept in check, and there will be a corresponding reduction of muscle mass, which also helps keep the cheeks flat. This chiseling also contributes to keeping the Zygomatic arch in closer to the head as is desired, giving the cheeks a flat appearance and preventing excessive head width. www.abtc.org /judges_ed/chiseled.htm   (845 words)

Skull (lateral view)   (Site not responding. Last check: 2007-10-20) Supraorbital arch: arched bone forming the upper part of the orbit. Posterior angle of the malar or zygomatic bone: part behing the cheek bone. Zygomatic arch: arched bone of the cheek bone. www.infovisual.info /03/015_en.html   (140 words)

Hemifacial Microsomia in Pediatric Patients: Asymmetric Abnormal Development of the First and Second Branchial Arches ... Arch dermal mesenchyme forms mandible, maxilla, zygomatic temporal bone, and squamous temporal bone (ST) through direct ossification. Zygomatic arch (arrowhead) is incomplete, and maxilla and squamous temporal bone are small. Muscle anlage of second branchial arch gives rise to muscles of facial expression including orbicular muscle of mouth (OM) and of eye (OE), nasal muscle (N), levator muscle of upper lip, greater and lesser zygomatic muscles, buccinator muscle (B), auricular muscles (A), and occipitofrontal muscle (OF). www.ajronline.org /cgi/content/figsonly/178/6/1523   (1704 words)

ADW: Rodent jaws The lateral masseter arose from the midportion of the zygomatic arch and also inserted along the bottom of the lower jaw towards its rear. The medial masseter was small, originating along the inside of the middle of the zygomatic arch and inserting on the mandible near the end of the molar toothrow. condition, lateral masseter moves forward and attaches to the the front of the zygomatic arch where it meets the rostrum. animaldiversity.ummz.umich.edu /site/topics/mammal_anatomy/rodent_jaws.html   (668 words)

Zygomatic - definition from Biology-Online.org   (Site not responding. Last check: 2007-10-20) Zygomatic arch, the arch of bone beneath the orbit, formed in most mammals by the union of the malar, or jugal, with the zygomatic process of the temporal bone. In the lower vertebrates other bones may help to form it, and there may be two arches on each side of the skull, as in some reptiles. Zygomatic process, a process of the temporal or squamosal bone helping to form the zygomatic arch. www.biology-online.org /dictionary/Zygomatic   (164 words)

William P. Wall and Sherri J. Hayes Masseter Lateralis.--In Rattus norvegicus this muscle originates on the anterior zygomatic arch and on the rostrum via the zygomatic plate; it inserts on the border of the masseteric fossa and the edge of the jaw. In Sciurus carolinensis the muscle originates on all of the zygomatic arch and onto the rostrum via the zygomatic plate; it inserts on the jaw from the anterior border of the cheek teeth through to the posterior border of the masseteric fossa and edge of jaw. In Cavia porcellus the masseter superficialis originates on the anterior portion of the zygomatic arch and it inserts on the angle of the jaw. www2.nature.nps.gov /geology/paleontology/pub/grd2/gsa04.htm   (2663 words)

Human Masticatory Muscle Volume and Zygomatico-mandibular Form in Adults with Mandibular Prognathism -- Kitai et al. 81 ... to the zygomatic arch and mandibular antegonial region. widths of the bizygomatic arch, the cranium, and the temporal correlation with the widths of the bizygomatic arch and the jdr.iadrjournals.org /cgi/content/full/81/11/752   (2905 words)

Zygomatic arch and orbital fracture - Patient UK Zygomatic arch and orbital fracture - Patient UK PatientPlus articles are written for doctors and so the language can be technical. The zygoma forms part of the floor and lateral wall of the orbit and the zygomatic arch is an important feature in the structure and appearance of the face. Usually, displaced fractures involve the inferior orbital rim and orbital floor, the zygomatico-frontal suture, the zygomatico-maxillary buttress, and the zygomatic arch. www.patient.co.uk /showdoc/40025215   (1119 words)

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