Apr 26, 2020 when the skull is viewed from a posterior aspect, the temporal bones can be seen on the lateral extremities of the skull, with a rounded prominence, the mastoid process, being the most prominent feature visible. Zygomatic bone, also called cheekbone, or malar bone, diamondshaped bone below and lateral to the orbit, or eye socket, at the widest part of the cheek. Craniofacial anatomy and embryology pocket dentistry. Gross anatomy zygoma has three surfaces, five borders, and two processes. D evelopmental and e volutionary s ignificance of the z ygomatic b. The zygomatic arch is occasionally referred to as the zygoma, but this term usually refers to the zygomatic bone or occasionally the zygomatic process. It is comprised of many bones, formed by intramembranous ossification, which are joined together by sutures fibrous joints. The numbers of temporal branch twigs passing over the zygomatic arch were 1 14. Jeans in your last issue, of grays anatomy with the latest. A single case of a bipartite zygomatic bone was observed among. Pdf on jan 1, 2017, silviya nikolova and others published a case of bipartite. Facial bone anatomy is complex, yet elegant, in its suitability to serve a multitude of.
The zygomatic bone is somewhat quadrangular in shape. This process is at first directed lateralward, its two surfaces looking upward and downward. Each forms the prominence of the cheek, and contributes to the formation of the lateral wall and floor of the orbit and to the wails of the temporal and infratemporal fossae fig. Laurie anne walden, ruth golding, lee ann howlett, esther, morganscorpion, j. Projecting from the lower part of the squama is a long, arched process, the zygomatic process. Grays anatomy for students drake, richard lee, gray, henry, mitchell, adam w. The frontal bone, paired parietal and temporal bones, and the occipital bone form a cranial vault with a concave interior facade to encase the convex surface of the brain. Pdf internal bone architecture in the zygoma of human and pan. The zygomaticus minor, a slender muscle arising from the maxillary process of the zygomatic bone, inserts just lateral to the insertion of the levator labii superioris muscle. Librivox recording of anatomy of the human body, part 1, by henry gray. Related links to external sites from bing these images are a random sampling from a bing search on the term zygomatic. The zygomaticus major muscle originates from the lateral surface of the zygomatic bone, just anterior to the zygomaticotemporal suture and lateral to the origin of zygomaticus minor. It courses inferomedially over the lateral surface of the maxilla to insert to the angle of the mouth.
Anatomy of the human body, part 1 grays anatomy by henry gray 1827 1861 genres. The frontal bone in an adult is an unpaired bone that is a part of the boney structure that forms the anterior and superior portions of the skull. Including the hyoid and the bones of the middle ear, the head contains 29 bones. The zygomatic bones are situated in the upper and lateral parts of the face. This is located on the lower portion of the squamous part. Topographic anatomy of the zygomatic arch and temporal. Having been formed by the joining of the infraorbital nerve. The zygomatic bone shows variations in the number of the foramina on its facial aspect. In a restricted sense it deals merely with the parts which form the fully developed individual and which can be rendered evident to the naked eye by various methods of dissection. The zygoma also known as zygomatic bone or malar bone is an important facial bone which forms the prominence of the cheek. The anterior end is deeply serrated and articulates with the zygomatic bone.
The term human anatomy comprises a consideration of the various structures which make up the human organism. Pdf the internal and external anatomy of the primate zygoma is central to orofacial. They are also commonly referred to a as the cheekbones or malar bones l. The terma anatomy is derived read more what is anatomy. They range in size from the tiniest found in the middle ear, to the largest that forms our thigh. Each zygomatic or malar bone forms the prominence of a cheek or widest part of the face. The temporal bone is one of the most important calvarial and skull base bones. This attachment point is located lateral to zygomaticus minor and medial to risorius muscles. The primary bones of the face are the mandible, maxilla, frontal bone, nasal bones, and zygoma. Anatomic description of zygomatic foramina in african. The zygomatic arch is significant in evolutionary biology, as it is part of the structures derived from the ancestral single temporal fenestra of the synapsid ancestor of mammals. Original research article morphological study on shapes of pterion pavan p. The buccal branch leaves the anterior border of the parotid gland and shows near relation with the parotid duct.
Anatomy of the human body, part 1 grays anatomy by. Henry grays classic anatomy textbook was first published in 1858 and has been in continuous publication ever since, revised and. In a restricted sense it deals merely with the parts. The zygomatic bone bridges the facial skeleton to the cranial bones by connecting the. It articulates with the zygomatic bone this process is at. The zygomatic branch divides into zygomaticofacial and zygomaticotemporal nerve branches. Orbit, and nasal and lacrimal bones 1 occipital bone 2 temporal bone 3 frontal bone 4 nasal spine of frontal bone 5 zygomatic bone 6 maxilla 7 frontal process of maxilla 8 ethmoidal bone 9 orbital plate of ethmoidal bone 10 perpendicular plate of ethmoidal bone 11 site of lacrimal bone 12 lacrimal groove of lacrimal. The zygomatic bone also cheek bone, malar bone, latin. Muscles of facial expression are unique in that they migrate to their destinations about the scalp, neck, and mostly about the face from second pharyngeal arch mesenchyme and thus receive their motor innervation via the facial nerve cn vii, the nerve of the second arch. Commonly the zygoma is referred to as having a central bony mass or. For some extraordinary reason most modern textbooks of anatomy and embryology make no mention of the postfrontal element of the human foetal skull in spite. It is comprised of many bones, formed by intramembranous ossification, which are joined together by. Muscles of the face and scalp free pdf epub medical books.
There is an anterior projection from the squamous part of the temporal bone, the zygomatic process. The zygomatic arch za is the structure formed by the union of the temporal process of the zygomatic bone and the zygomatic process of the temporal bone. There are a total of 206 bones in the adult human body. It adjoins the frontal bone at the outer edge of the orbit and the sphenoid and maxilla within the orbit. The zygomatic branch exits the superomedial border of the parotid gland and passes transversely over the zygomatic bone towards the lateral canthus. The body of the zygomatic bone is roughly quadrangular and has two processes. These joints fuse together in adulthood, thus permitting brain growth during adolescence. Orbit, and nasal and lacrimal bones 1 occipital bone 2 temporal bone 3 frontal bone 4 nasal spine of frontal bone 5 zygomatic bone 6 maxilla 7 frontal process of. The zygomatic bone is part of the facial skeleton of mammals, most reptiles, amphibians, and. The cranial bones 8the occipital bone,the parietal bones 2the frontal bones1 the temporal bones 2the spheno. Human anatomy book pdf by bd chaurasia human anatomy human anatomy is the science which deals with the structure of the human body.
The temporal bone is ossified from eight centers, exclusive of those for the internal ear and. Korean and brazilian studies showed a relative predominance. Each forms the prominence of the cheek, and contributes to the formation of the lateral wall and floor of the orbit and to the wails. Bones of the skull structure fractures teachmeanatomy. The zygomatic bone also takes part in forming the floor of the orbit, as well as the temporal fossa and the infratemporal fossa. Respiratory system anatomy lecture 4 2 anatomical structure and boundaries the pterygopalatine fossa is an inverted tear drop shaped space. Zygomatic malar cartilage adds in development of maxilla. These plates forms a trough of bone around the maxillary tooth germ. Cureus bilateral absence of the zygomatic nerve and.
Lewis 1918 grays anatomy 20th ed in public domain at yahoo or. Original research article morphological study on shapes of. The zygomatic arch is a horizontal bone on the side of the head in front of the ear, a little above the tragus. The zygomatic bone is generally described as ossifying from three centersone for the malar and two for the orbital portion. In most modern mammals the zygomatic bone forms a large part of the face and. Without personal effects or actual body tissue, you can still determine what sex a person was by looking at one part of their skeletal remains.
Korean and brazilian studies showed a relative predominance of single or double zygomatic foramina, while four foramina were found in 5. It is formed by the temporal process of the zygomatic bone anterior twothird and the zygomatic process of the temporal bone posterior onethird. Muscles of the face and scalp muscles of the facial expression. Because the pair of them protrude laterally and form the eminences of the face cheek bones, both are prone to fractures. The zygomatic bone is small and quadrangular, and is situated at the upper and lateral part of the face.
Laurie anne walden, ruth golding, lee ann howlett, esther. Pterygoid bone anatomy sphenoid bone skulls and anatomy on human anatomy pearson blank skull the 206 named bones of the human skeleton are divided into two anatomy body list occipital bone. The number of foramina can vary between 0 to 5 9, 10. Can you identify all these systems and organs and their locations at the top of your head. The zygomatic bone articulates with the frontal bone, sphenoid bone, and paired temporal bones, and maxillary bones. The important muscles in dentistry the muscles of mastication. Anatomy of tmj t he temporomandibular joint tmj is the site of articulation between the mandible and the skull, specifically the area about the articular eminence of the temporal bone. Anatomy of the human body, part 1 grays anatomy by henry. Lewis 1918 gray s anatomy 20th ed in public domain at yahoo or bartleby lewis 1918 gray s anatomy 20th ed in public domain at yahoo or bartleby zygomatic bone c0043539. The temporal bone is situated on the sides and the base of the cranium and lateral to the temporal lobe of the cerebrum. Racial differences in the anatomy of the zygomatic foramina have been described. Ancestral variations in the shape and size of the zygoma oettle.
Having been formed by the joining of the infraorbital nerve, the zygomatic nerve, and nerves from the roof of the mouth, upper teeth and gums, and mucous membranes of the cheek, the maxillary nerve traverses the area between the maxilla and the sphenoid bone. Topographic anatomy of the zygomatic arch and temporal fossa. Interdental septi run between the buccal and lingual cortices of the mandible, and interradicular septi run between the mesial and distal roots of the molars. On its orbital aspect, just within the orbital opening and about 11 mm below the frontozygomatic suture, there is a tubercle of varying size and form, but present in 95 per cent. Patients dysphagia need a full exam of their cranial nerves. Morphometric study of pterion in dry human skull bones of nigerians. The temporal bone is composed of several parts, these being the squamous part, the zygomatic process, the petromastoid part, the. May 16, 20 from this trough a downward extension of bone forms the lateral alveolarplate. Apr 23, 2020 there are a total of 206 bones in the adult human body. The zygomatic bone also known as the zygoma is one of the most irregular shaped bones of the skull. The zygomatic process is a rough triangular eminence, situated at the angle of separation of the anterior, zygomatic, and orbital surfaces of maxilla in front it forms part of the anterior surface. Skull cranial skeleton neurocranium facial skeleton. Occasionally, the nerve and the foramen have been found to be absent.
This article covers the anatomy of the temporal bone, its parts, connecting sutures, and foramina. Gray s anatomy for students drake, richard lee, gray, henry, mitchell, adam w. The stylohyal does not unite with the rest of the bone until after puberty, and in some skulls never at all. Started in 1995, this collection now contains 6767 interlinked topic pages divided into a tree of 31 specialty books and 732 chapters. Grays anatomy for students flash cards third edition. Pterygoid bone anatomy sphenoid bone skulls and anatomy on human anatomy pearson blank skull the 206 named bones of the human skeleton are divided into two anatomy body list occipital. Origin maxillary process of the zygomatic bone and the anterior 23 of the zygomatic arch medial border of zygomatic arch inferior border of posterior of zygomatic arch insertion angle of mandible coronoid process innervation masseteric nerve from the v 3 mandibular division of the trigeminal nerve. Henry gray s classic anatomy textbook was first published in 1858 and has been in continuous publication ever since, revised and expanded through many successive editions.
Anatomy of the human body, part 1 internet archive. The cranial bones 8the occipital bone,the parietal bones. This article incorporates text in the public domain from page 164 of the 20th edition of grays anatomy 1918. Department of human anatomy and cell biology, faculty of basic medical sciences, college of health sciences. Grays anatomy for students flash cards third edition 2015unitedvrg. In the human skull, the zygomatic bone cheekbone or malar bone is a paired irregular bone. Respiratory system anatomy lecture 4 8 in the pterygopalatine fossa. The zygomatic process of the temporal bone is a long, arched process projecting from the lower part of the squamous portion of the temporal bone. In the human skull, the zygomatic bone cheekbone or malar bone is a paired irregular bone which articulates with the maxilla, the temporal bone, the sphenoid bone and the frontal bone.
From this trough a downward extension of bone forms the lateral alveolarplate. The skull is a bony structure that supports the face and forms a protective cavity for the brain. The orbital series is figured in light gray while the zygoma or jugal is. The zygomatic arch, or cheek bone, is formed by the zygomatic process of the temporal bone a bone extending forward from the side of the skull, over the opening of the ear and the temporal process of. It is formed by the temporal process of the zygomatic bone anterior twothird and. Temporal branch of the facial nerve and its relationship. The zygomaticofacial supplies the skin of the zygoma refers to zygomatic bone while the zygomaticotemporal nerve which contains parasympathetic. Anatomic, clinical, surgical, and radiographic correlation of the.
The frontal bone gray s anatomy of the human body what if you were trying to identify a person, but all you had was a nameless skull. This bilateral joint functions to open and close the jaws and to approximate the teeth of the opposing arches during mastication. Anatomy is the branch of biology concerned with the study of the structure of organisms and their parts. Jun 11, 20 the mandible houses the lower dentition, which in adults consists of 2 central and 2 lateral incisors, 2 canines, 2 first and 2 second premolars, and 3 sets of molars. Original research article morphological study on shapes of pterion. The organs in the human body are divided into systems depending on their functions. Anatomy of the human body, part 1 gray s anatomy henry gray 1827 1861 henry gray s classic anatomy textbook was first published in 1858 and has been in continuous publication ever since, revised and expanded through many successive editions. Lewis 1918 grays anatomy 20th ed in public domain at yahoo or bartleby lewis 1918 grays anatomy 20th ed in public domain at yahoo or bartleby zygomatic bone c0043539. The sphenoid bone is centrally located in the skull base. Anatomy of the human body, part 1 grays anatomy henry gray 1827 1861 henry grays classic anatomy textbook was first published in 1858 and has been in continuous publication ever since. Ancestral variations in the shape and size of the zygoma. The scientific study of the structure of living things.
Imaging findings or procedure details the sphenoid bone is wedged greek. The frontal process frontosphenoidal process is thick and serrated. Lee ann remington od, ms, faao, in clinical anatomy and physiology of the visual system third edition, 2012. This recording is of the publicdomain 1918 us edition some information may be outdated. The sphenoid osseous anatomy can be studied using ct. Human skull anatomy poster 24 x 36 laminated or heavy. Developmental and evolutionary significance of the zygomatic bone. Two common procedures7, 9, 10 are 1 cutting of the prominent body portion of the zygomatic bone and za, and 2. Pdf a case of bipartite zygomatic bone researchgate. The human body has an amazing array of different bones, many of which you can find on yourself or on a skeleton. Feb 03, 2018 anatomy of the human body, part 1 gray s anatomy by henry gray 1827 1861 genre s. It consists of three different processes, varying in size and shape.
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