Occipital bone<

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Topic: Occipital bone<

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The axial skeleton Chapter 7

A specialized joint between the occipitalb> bone and the first vertebra of the neck stabilizes the positions of the brain and spinal cord while permitting a considerable range of head movements.
Articulations: The sphenoid bone articulates with the frontal, occipitalb>, parietal, ethmoid, and temporal bones of the cranium and the palatine bones, zygomatic bones, maxillary bones, and vomer of the face (Figures 7-3c,d,e, 7-4a, and b).
The adult vertebral column, or spine, consists of 26 bones: the vertebrae (24), the sacrum, and the coccyx, or tailbone.

http://www.udayton.edu/~brahler/axial_skeleton_chapter_7.htm (8647 words)



Microscopic Age Changes in the Human Occipitalb> Bone

The value of histological examination of the human occipitalb> bone for estimation of age-at-death was assessed.
While observable changes in the occipitalb> bone do occur with increasing age, the amount of random variation in the parameters examined preclude their use for accurate age estimation.
Undecalcified sections of occipitalb> bone from eighteen male Caucasian subjects between the ages of 21 and 70 years were prepared for analysis using polarized light microscopy.

http://www.astm.org/JOURNALS/FORENSIC/PAGES/2332.htm (235 words)



Dorlands Medical Dictionary

a bone developed by ossification in the skin.
a bone developed in a muscle, tendon, or fascia, as a result of excessive exercise.
a cranial bone present in some vertebrates, forming the most anterior part of the internal base of the cranium.

http://www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_b_18zPzhtm (2315 words)



The Harper Fragment

In contrast, occipitalb> bone is characterized by major variations on its internal surface (i.e., many different bumps and grooves from various things), much greater curvature, and substantial variation in thickness (compare drawings of internal aspects of parietal and occipitalb> bone in Figure 2).
In contrast to parietal bone, occipitalb> bone does not show a pattern of vascular grooving.
More importantly, the origin of the Harper fragment as parietal bone does not in any way support the conclusion that John Kennedy was struck in the head by one and only one bullet.

http://mcadams.posc.mu.edu/harper1.htm (1428 words)



parietal bone -- Encyclopædia Britannica

The parietal bones are marked internally by meningeal blood vessels and externally by the temporal muscles.
A living tissue with many vital functions, bone provides structure and support to the body.
The breastbone, situated in the midline of the chest wall, is shaped like a blade.

http://www.britannica.com/eb/article-9058462?&query=parietal (969 words)



Cranial Fossae

The inner aspect of the occipitalb> bone forms the 'cup' of the posterior fossa.
• The bony floor is formed by the dorsum sellae and the clivus of the sphenoid, the occipitalb> bone, the petrous and mastoid temporal bone, and the parietal bone.
• Butterfly-shaped with the central portion represented by the body of the sphenoid bone.

http://www.ucsf.edu/nreview/02.4-Anatomy-Cranium/CranialFossae.html (529 words)



Orthotic Modeling of the Developing Skull - Journal of Prosthetics and Orthotics, 2004 American Academy of Orthotists & Prosthetists

The paired sphenoidal fontanels are formed at the intersection of the frontal, occipitalb>, temporal, and greater wing of the sphenoid bones.
As compact bone continues to develop and the flat bones of the developing cranium begin to oppose each other, a suture is created.
Lambdoid synostosis and occipitalb> plagiocephaly: clinical decision rules for surgical intervention.

http://www.oandp.org/jpo/library/2004_04S_015.asp (2152 words)



Paksitan Journal of Medical Sciences

This study was undertaken to evaluate their positions and the incidence in dry adult human occipitalb> bones.
This foramen is present in the squamous part of the occipitalb> bone at the occipitalb> protuberance and it transmits a vein that connects the confluence of the sinuses with the veins of the suboccipital plexus and receiving also the occipitalb> diploic vein.
To ascertain the incidence and position of the emissary vein in the squamous part of the occipitalb> bone from the posterior margin of the foramen magnum to occipitalb> protuberance.

http://www.pjms.com.pk/issues/julsep01/article5.html (879 words)



Head Lecture notes

The spine of the sphenoid bone lies medial to the mandibular fossa.
The paired nasal bones articulate with the frontal bone and frontal processes of the maxillary bones (Clemente plate 522 fig.
The inferior orbital fissure is a gap between the maxillary bone and the greater wing of the sphenoid bone.

http://web.indstate.edu/thcme/duong/head.html (12467 words)



New Page 1

Inferior or base view, part of the occipitalb> bone.
External occipitalb> protuberance: a protruding bump on the occipitalb> bone, posterior on the skull.
Palatine: inferior cranial view; this bone is posterior to the hard palate of the maxilla.

http://people.uncw.edu/albertm/ant326/01skullnotes.htm (553 words)



Interior of the Skull, Cranial Meninges and Related Vasculature

confluens of sinuses lies on the inner surface of the occipitalb> bone; it is between the layers of dura at the junction of the falx cerebri and tentorium cerebelli
boundaries: anterior - petrous ridge of the temporal bone; posterior - inner surface of the occipitalb> bone
articulates with the parietal bone posteriorly; zygomatic, ethmoid and sphenoid bones inferiorly; maxilla, nasal and lacrimal bones anteriorly; it is formed from two ossifications centers which normally fuse in the midline - if they do not fuse, a midline "metopic suture" is the result

http://anatomy.uams.edu/anatomyhtml/cranialcavity.html (2863 words)



Why Yawn

The occipitalb> bone and the spine are like a piston pushing up between the temporal bones that are being pulled downward.
At the deepest part of the breath when the lungs have the greatest force, the lungs fill up the ribcage, then lift the ribs.The ribs lift the spine and the force is transferred from the top of the spine to a bone of the skull called the occipitalb> bone.
The occipitalb> bone forms most of the seat for the brain, and it is pushed upward.

http://www.members.shaw.ca/hilaryking/Oldbrain1.htm (2802 words)



Neck

The temporal bone, zygomatic arches, occipitalb> bone, mandible, cervical vertebrae, scapula clavicles, manubrium, and hyoid bone form the skeleton of the neck.
The hyoid bone: It s body is at the level of C3.
Forms the floor of mouth: It is attached from the mylohyoid line to the superior aspect of body of hyoid bone and the midline raphé.

http://iris3.med.tufts.edu/headneck/neck.htm (8906 words)



Cat Brain Removal

The frontal bone is difficult because of the large frontal sinuses.
Explore the edges of the cut bone around the brain.
Often pieces of the frontal bone forming the orbital surfaces need to be flaked off, and overhanging pieces of bone around the cerebellum and the sides of the cerebrum prevent removal of the brain.

http://biology.clc.uc.edu/fankhauser/Labs/Anatomy_&_Physiology/A&P202/Brain_Dissection/CAT_BRAIN.htm (723 words)



II. Osteology. 5a. The Cranial Bones. 1. The Occipitalb> Bone. Gray, Henry. 1918. Anatomy of the Human Body.

—The superior angle of the occipitalb> bone articulates with the occipitalb> angles of the parietal bones and, in the fetal skull, corresponds in position with the posterior fontanelle.
The inferior angle is fused with the body of the sphenoid.
From the external occipitalb> protuberance a ridge or crest, the median nuchal line, often faintly marked, descends to the foramen magnum, and affords attachment to the ligamentum nuchæ; running from the middle of this line across either half of the nuchal plane is the inferior nuchal line.

http://www.bartleby.com/107/31.html (1850 words)



Cutaneous Emphysema and Craniocervical Bone Pneumatization -- Turowski et al. 22 (7): 1398 -- American Journal of Neuroradiology

CT of the occipitalb> bone demonstrates extension of mastoidal pneumatization to the occipitalb> bone.
Lo WWM, Zapanta E. Pneumatization of the occipitalb> bone as a cause of radiolucent skull lesions.
of the atlas by extension from the temporal and occipitalb> bones

http://www.ajnr.org/cgi/content/full/22/7/1398 (1064 words)



Virtual Hospital: Illustrated Encyclopedia of Human Anatomic Variation: Opus V: Skeletal System: Occipitalb> Bone

The atlas may be fused., in part or completely, with the occipitalb> bone (termed, assimilation of the atlas).
Gladstone, R.J. and W. Erichsen-Powell (1915) Manifestations of occipitalb> vertebrae, and fusion of the atlas with the occipitalb> bone.
The crista occipitalis in some subjects is a sulcus (occipitalb> sulcus) rather than a ridge.

http://www.vh.org/adult/provider/anatomy/AnatomicVariants/SkeletalSystem/Text/OccipitalBone.html (1582 words)



GC1137: Skeletal System Practice Test

3) This suture lies between the occipitalb> bone and the mastoid area of the temporal bone.
Part Two will be identification of structures (bones, bone processes, histology images, models, etc.)
8) Which specific bone process is immediately lateral to the clavicle?

http://www.gen.umn.edu/courses/1137/tests/skeltest.htm (536 words)



Anatomy Tables - Scalp, Cranial Cavity, Meninges & Brain

posterior cerebral a.; anterior and posterior temporal brs.; medial occipitalb> a.
these paired bones articulate at midline at the sagittal suture, anteriorly with frontal bone at coronal suture, posteriorly with occipitalb> bone at lambdoidal suture, and inferiorly with: greater wing of sphenoid bone anteriorly at pterion, squamosal part of temporal bone at squamous suture, and mastoid part of temporal bone posteriorly at parietomastoid suture
where the anteromedial tip of the petrous temporal bone nearly contacts the body of the sphenoid bone; closed by cartilage in life; transmits greater and deep petrosal nerves

http://anatomy.med.umich.edu/nervous_system/scalp_tables.html (2733 words)



Articulations of the Vertebral Column with the Cranium - Wikimd

[[Articulation of the Atlas with the Occipitalb> Bone (articulatio atlantoöccipitalis)]]—The articulation between the atlas and the occipitalb> bone consists of a pair of condyloid joints.
307)]]—The alar ligaments are strong, rounded cords, which arise one on either side of the upper part of the odontoid process, and, passing obliquely upward and lateralward, are inserted into the rough depressions on the medial sides of the condyles of the occipitalb> bone.
The Lateral Ligaments—The lateral ligaments are thickened portions of the articular capsules, reinforced by bundles of fibrous tissue, and are directed obliquely upward and medialward; they are attached above to the jugular processes of the occipitalb> bone, and below, to the bases of the transverse processes of the atlas.

http://www.wikimd.org/index.php?title=Articulations_of_the_Vertebral_Column_with_the_Cranium&printable=yes (783 words)



Bioline International Official Site (site up-dated regularly)

Her CT scan [Figure - 1] head revealed a bony mass in the right squamous part of the occipitalb> bone measuring 4 cm x 3 cm.
Osteomas are benign, bone-forming tumours located within bones or developing on them.
Since the tumour has been found to develop after puberty Haymann believed it to depend on conditions regulating growth in the cranial bones.

http://www.bioline.org.br/request?is04094 (914 words)



Occipitalb>

Inside, the cerebellum sits in the posterior cranial fossa which is mostly occipitalb> bone based.
The occipitalb> abuts the temporal bones at the sides and the sphenoid bone at the narrow front.
The foramen magnum is the spinal canal of this bone.

http://www.pediatric-orthopedics.com/Topics/Bones/Skull/Skullduggery/Occipital/occipital.html (157 words)



Neck

At the base of the occipitalb> bone, at the basilar parts, the occipitalb> bone is attached to the sphenoid bone.
The large opening, or foramen magnum, in the occipitalb> bone can be seen in the inferior view of the skull, and allows the nerves of the upper spinal cord to pass through the skull between the brain and the rest of the spinal cord.
The skull is one of the principle groups of bones in the human anatomy.

http://www.american.edu/adonahue/k10neck.htm (1586 words)



SELF TEST

Occipitalb>, petrous portion of the temporal bone, and sphenoid (posterior portion of body)
Occipitalb> and mastoid portion of the temporal bone
Occipitalb> and petrous portion of the temporal bone

http://www.med.wayne.edu/diagRadiology/Anatomy_Modules/axialpages/ST1a.html (63 words)



Focal Nervous System Lesions

[B] CT of the brain showing brain tissue protruding through an occipitalb> bone opening.
The point of origin of the occipitalb> encephalocele is determined by observation.
The point of origin of anterior encephalocele may be difficult to determine, especially if it is in the nasal or oral region.

http://pediatricneuro.com/alfonso/pg258.htm (456 words)



Bones

Frontal, Parietal (2), Temporal (2), Occipitalb>, Sphenoid, Ethmoid, Maxilla (2), Zygomatic, Mandible, Lacrimal (2), Nasal (2), Palatine, Vomer, Palatine (2), Hyoid, and Inferior Nasal Conchae (2).
Located at the base of skull, Anterior to basilar part of Occipitalb> Bone and back of the Ethmoid Bone.
Palatine Process articulates with its fellow from the opposite side to form most (three-fourths) of the Hard Palate.

http://www.uic.edu/depts/mcam/specialties/radiology/mafee (424 words)



Dept of Anth: Occipitalb> Page

The occipitalb> touches, or articulates with, the following bones:
The Occipitalb> Bone consists of a large squamous, or flattened portion separated from a small thick basal portion by the Foramen Magnum on either side of which is a left or right Occipitalb> Condyle.
A single internal Occipitalb> Protuberance or Cruciform Eminence is also found in this area.

http://www.csuchico.edu/anth/Module/occipital.html (288 words)



The Harper Fragment: Does it Show Kennedy was Shot From the Front?

"Immediately superior to the temporal bone" is parietal bone, not occipitalb> bone.
A pattern of vascular grooving consistent with parietal bone and inconsistent with occipitalb> bone.
A piece of bone found by Billy Harper, given to the Chief Pathologist at Methodist Hospital and identified as occipitalb> bone, was found 25 feed behind and to the left of the car's position when the President was hit in the head, according to the Secret Service.

http://mcadams.posc.mu.edu/harper.htm (1333 words)



Skull

squamous occipitalb> and petrous temporal bones, cerebellum, pons and medulla, tentorium cerebelli, foramen &, jugular foramen, internal auditory canal,hypoglossal canal #13;
Comprised of 8 distinct bones that are fused together in the adult
Squamous suture with the temporal bones and part of the sphenoid bone

http://www.pitt.edu/~anat/Neuro/Skull/Skull.htm (960 words)



Occipitalb> Bone

The occipitalb> bone forms the back part of the skull
These bones form the greater part of the
The temporal bones form the sides and part of the

http://www.tpub.com/content/medical/14274/css/14274_42.htm (165 words)

Topic: Occipital <b>bone<

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