RA & Anatomy
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| The cranium serves to... | Enclose the brain
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| The facial bones serve to... | Form the framework of the face
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| ______ ______ form the anterior aspect of the skull | Facial Bones
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| The cranium is divided into the... | Cranial Vault & the Base
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| Temporal Bones, Parietal Bones, Frontal Bone, Occipital Bone, Sphenoid Bone, Ethmoid Bone | Cranial Bones
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| Forms the forehead & roofs of the orbits, Most anterior & most superior bone of cranium, 2 surface planes | Frontal Bone
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| Superior margin of each orbit, bony ridge behind the eyebrow | Supraorbital Margin
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| Lie deep to our eyebrows, comma-like bumps/eminences | Supercilliary Arches
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| Smooth elevation between the supercilliary arches in the midline, above the nose | Glabella
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| 2 Rounded prominences on the frontal bone where the frontal bone changes direction between the vertical plane and the horizontal plane | Frontal Eminences
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| Contributes to the anterior cranial fossa | Frontal Bone
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| Superior to the temporal & occipital bones, posterior to the frontal bone, seperated by the midsagittal suture, 2 surface planes | Parietal Bones
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| 4 Sutures of the Cranium | Coronal, Squamosal, Lambdoidal, Sagittal
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| Located where the parietal bones meet the frontal bone | Coronal Suture
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| Occurs where the parietal bones meet the temporal bones inferiorly | Squamosal Suture
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| Occurs where the right & left parietal bones meet superiorly | Midsagittal Suture
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| Occurs where the parietal bones meet the occipital bone posteriorly | Lambdoidal Suture
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| Most posterior & inferior of the cranial bones, forms the posterior cranial fossa | Occipital Bone
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| Located medially on the inferior aspect of the skull, where brain stem connects to the brain | Foramen Magnum
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| Large eminences on either side of the foramen magnum, articulate with the first vertebra (C1) | Occipital Condyles
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| Small eminence medially & posterior to the foramen magnum | External Occipital Protuberance
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| Lie inferior to the parietal bones & anterior to the occipital bone, form the inferolateral portion of skull | Temporal Bones
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| 4 Regions of the Temporal Bones | Squamosal, Tympanic, Petrous, Mastoid
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| Long, thin, narrow, arch/bar-like projection, projects anteriorly to meet the zygomatic bones, part of the squamosal region of temporal bones | Zygomatic Process/Arch
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| Located on the inferior surface of the zygomatic process, depression/socket anterior to the auditory meatus, only movable joint in skull | Mandibular Fossa
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| Project inferiorly from the tympanic region | Styloid Process
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| Most posterior & inferior part of the temporal bone and part of the mastoid region | Mastoid Process
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| 3 Small Bones(Ossicles) of the ear | Malleus, Incus, Stapes
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| Spans the width of the cranial floor and resembles a bat, consists of greater wings, lesser wings, and the pterygoid process | Sphenoid Bone
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| Saddle shaped prominence on the superior surface of the body of the sphenoid bone; seat of the saddle is... | Sella Turcica; Hypophyseal Fossa
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| Lies between the nasal & sphenoid bones, forms most of the medial bony region between the nasal cavity & orbits | Ethmoid Bone
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| Extends medially from the lateral masses and protrudes into the nasal cavity | Superior & Middle Nasal Concha
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| superior surface of the ethmoid bone, contributes to the roof of the nasal cavity & the floor of the anterior cranial fossa | Cribriform Plate
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| Superior projection in the midline between the two cribriform plates | Crista Galli
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| Projects inferiorly in the median plane & forms the superior part of the nasal septum | Perpendicular Plate
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| Unpaired facial bones | Mandible, Vomer
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| Paired facial bones | Maxillary, Zygomatics, Nasals, Lacrimals, Palatines, Inferior Nasal Concha
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| Most anterior and inferior bone; largest, strongest facial bone composed of two main parts, the ramus & body | Mandible
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| Straight, vertical, posterior part of the mandible | Ramus (Rami)
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| Curved, horizontal, anterior part of the mandible | Body
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| Angle formed by the junction of the inferior edge of the body and the posterior edge of the ramus | Madibular Angle
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| Superior margin of the mandible, inferior margin of the maxillary bones | Alveolar Process
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| Projection of bone located on the midline just above the base of the chin, makes the chin more prominent | Mental Eminence/Protuberance
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| Inferior to the nasal cavity and lateral to the nasal cavity; articulate with all the other facial bones except the mandible | Maxillary Bones
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| Frontal, Ethmoid, Sphenoid, and Maxillary Sinuses make up the.... | Paranasal Sinuses
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| Project medially from the alveolar process to form the anterior region of the hard palate; border between the nasal cavity and the oral cavity | Palatine Process
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| Finger-like projections that extend superiorly and anteriorly from the maxillary bones | Frontal Process
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| Inferior and lateral to the orbital cavities, form the lateral wall of the orbits | Zygomatic Bones
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| Inferior and obliquely anterior to the glabella, form the bridge of the nose and articulate at the midline | Nasal Bones
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| Located in the medial orbital walls | Lacrimal Bones
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| Indent under the glabella that comes back out and down to the nasal bones | Root of the Nose
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| Bones that complete the posterior part of the hard palate | Palatine Bones
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| Forms the inferior part of the nasal septum | Vomer
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| Thin, curved bones that project medially to form the lateral walls of the nasal cavity | Inferior Nasal Concha
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| Paired cranial bones | Temporal & Parietal Bones
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| Unpaired cranial bones | Frontal, Occipital, Sphenoid, & Ethmoid Bone
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| Bony ridge which extends bilaterally from the external occipital protuberance | Superior Nuchal Crest
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| Thinnest bone of the skull that is the anterior and superior part of the temporal bones; receeds medially to form the temporal cavity | Squama
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| Vertical ridge on each side of the vertical surface of the frontal bone where the bone changes direction | Lines of the Temple
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| Slightly inferior and lateral to the outer corner of the eye where the zygomatic bones change direction; the measure between is the widest part of the anterior plane of the face | Prominence of the Cheek
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| Small sharp spur of bone projecting where the two maxillary bones meet at the midline directly inferior to the nasal cavity | Nasal Spine
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| Depression curving backward between the mental eminence and the lower incisors | Incisive Fossa
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Created by:
sbarton
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