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| | AANS.org Education and Meetings AANS Scientific Journals Neurosurgical Focus |
 | | Eighteen patients with meningioma of the ventral foramen magnum were treated surgically in three neurosurgical departments at the University of Mississippi Medical Center (1990), Loyola University Medical Center (1991--1993), and the University of Arkansas for Medical Sciences (1993--1998). | | | Meningiomas of the ventral foramen magnum are one of the most challenging types of meningiomas to treat because a large number of vital neurovascular structures, which are sensitive to injury, are crowded in this deeply hidden central area. | | | The authors conducted a retrospective study of 18 patients who harbored lesions in the ventral foramen magnum (mean follow up 40 months) in whom surgery was performed via a transcondylar approach. |
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http://aans.org/education/journal/neurosurgical/june99/6-6-5.asp?...
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| | Heffez Neurosurgical Associates - Papers |
| | The absence of a csf signal dorsal to the ectopic cerebellar tonsils, or distortion of the brain stem, cervical spinal cord or cerebellar tonsils was taken as evidence of physical compression of the contents of the foramen magnum. | | | Radiographic evidence of tonsillar ectopia in the absence of a convincing clinical picture was not sufficient to prescribe surgical therapy. | | | Despite the minimal degree of tonsillar ectopia, our patients reported improvement in symptoms in response to surgical enlargement of the foramen magnum. |
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http://www.heffezneurosurgical.com/chiaripaperweb.jsp
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| | Paksitan Journal of Medical Sciences |
| | In their observation there was no median foramen but in our findings in 2.72% cases there was median foramen. | | | The incidence and positions of the occipital emissary veins are important for the neurosurgeons during their such occipital surgery as these will given them awareness to avoid the excessive bleeding. | | | So, while performing the occipital surgery it is essential to know the incidence and positions of the occipital emissary veins to avoid the excessive bleeding. |
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http://www.pjms.com.pk/issues/julsep01/article5.html
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| | The Potential Effects of Mechanical Faults of the Spine on Cerebrospinal and Interstitial Fluid Flow in the Brain |
| | Mechanical faults also change the normal postural and functional relationships between the head and cervical spine which is where arteries and veins of the brain pass through the skull. | | | Although the horizontal position used for sleep reduces the efficiency of the diaphragm, heart valves, circulation, and even brain circulation, it does allow the energy using CSF production system a chance to recover and takes the weight of the brain off of the basicranium and foramen magnum. | | | Pressure conus can be fatal because the increased pressure on the brainstem depresses respiration, circulation, and heart rate. |
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http://www.chiroweb.com/hg/08/19/21.html
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| | Brain Herniation Radiology, Pathology, and Neurology |
| | A sagittal MRI is a much easier method of determining if foramen magnum herniation is present as in this patient with a tentorial subdural and shift through the foramen magnum. | | | This is postulated to occur as the anterior spinal tracts within the ventral spinal cord, become compressed against the bone of the posterior vertebral bodies. | | | Patients with a Chiari malformation may have little or no clinical symptomatology or may demonstrate Lhermitte’s phenomenon. |
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http://rad.usuhs.mil/rad/herniation
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| | Part 03: Removal of Brain Stem Via Foramen Magnum |
| | The foramen magnum with spinal cord protruding out should be seen when done properly. | | | Still, even with the smallest of deer breeds - a little practice makes perfect and the technique becomes quite routine. | | | Place the head on a flat, disinfectable, surface at a comfortable working height. |
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http://www.michigan.gov/mda/0,1607,7-125-1566_2310_13284-65650--,00.html
(607 words)
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| | Foramen magnum - Wikipedia, the free encyclopedia |
| | Thus, the neck muscles do not need to be as robust in order to hold the head upright. | | | In anatomy, the foramen magum is the large hole through the occipital bone in the base of the skull, through which the medulla oblongata (an extension of the spinal cord) exits the skull vault. | | | Comparisons of the position of the foramen magum in early hominid species are useful to determine how comfortable a particular species was when walking on two limbs (bipedality) rather than four. |
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http://www.wikipedia.org/wiki/Foramen_magnum
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| | MSN Encarta - Search Results - foramen magnum |
| | Most vertebrae consist of a body, a large mass of solid bone that is the weight-bearing part of the vertebra. | | | Exclusively for MSN Encarta Premium Subscribers--quickly search thousands of articles from magazines such as Time, Newsweek, The Atlantic Monthly, and Smithsonian. | | | How well did we match your search term? |
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http://encarta.msn.com/foramen_magnum.html
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| | AllRefer Health - Increased Intracranial Pressure (ICP, Intracranial Pressure - Increased) |
| | The pressure itself can be responsible for further damage to the central nervous system by decreasing blood flow to the brain or by causing the brain to herniate (push through) the opening in the back of the skull where the spinal cord is attached. | | | Many conditions can cause increases in the intracranial pressure including metabolic, toxic, traumatic, infectious, neoplastic and idiopathic. | | | Sudden herniation through the foramen magnum (back of the skull) is fatal. |
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http://health.allrefer.com/health/increased-intracranial-pressure-info.html
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| | Figures |
| | Surgical approach to an anterior foramen magnum meningoma. | | | Tumor (asterisk) is noted through intact arachnoid to the left of the rostral spinal cord and is draped with various nerve rootlets (arrows) and blood vessels. | | | A: Normal relationship of brainstem to foramen magnum. |
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http://www.medscape.com/content/2003/00/45/77/457749/457749_fig.html
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| | II. Osteology. 5a. The Cranial Bones. 1. The Occipital Bone. Gray, Henry. 1918. Anatomy of the Human Body. |
| | This begins on the cranial surface of the bone immediately above the foramen magnum, and is directed lateralward and forward above the condyle. | | | That part of the squama which lies above the highest nuchal lines is named the planum occipitale, and is covered by the Occipitalis muscle; that below, termed the planum nuchale, is rough and irregular for the attachment of several muscles. | | | The angle of union of the superior sagittal and transverse sinuses is named the confluence of the sinuses (torcular Herophili 25), and its position is indicated by a depression situated on one or other side of the protuberance. |
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http://www.bartleby.com/107/31.html
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| | [No title] |
| | The brain is connected to the spinal cord through a large hole, the foramen magnum. | | | The brain is situated within the cranium - a box-like posterior part of the skull. | | | The pubic bone exposed on a carcass is called the aitch bone. |
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http://www.aps.uoguelph.ca/~swatland/ch2_1.htm
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| | foramen magnum |
| | foramen magnum: a large opening in the occipital bone at the base of the skull through which the spinal cord passes. |
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http://www.webref.org/anthropology/f/foramen_magnum.htm
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| | foramen magnum |
| | Reply by: CCF Neurology MD - AY on 10/01/1998 | | | what is foramen magnum, but my notes do not reflect that. | | | the foramen magnum articulates the skull with the first cervical vertebrae. |
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http://www.medhelp.org/perl6/neuro/archive/9266.html
(252 words)
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| | Crania |
| | The dark area at the bottom of the skull is the foramen magnum, the hole through which the spinal column passes. | | | It has a forward position in australopithecine skulls, a strong indication that they were bipedal. |
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http://www.talkorigins.org/faqs/homs/crania.html
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| | Management of Meningiomas (File 19): FORAMEN MAGNUM MENINGIOMA |
| | A joint program of the Departments of Otolaryngology, Neurosurgery, and Radiation Oncology dedicated to the evaluation and treatment of patients with cranial base lesions. | | | MRI clearly defines the relationship of the tumor to the surrounding structures (Fig. | | | These meningiomas usually arise from the anterior-lateral dura at the foramen magnum but can occur directly anteriorly, posteriorly, or posterior-laterally. |
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http://neurosurgery.mgh.harvard.edu/CranialBaseCenter/MENING19.HTM
(728 words)
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| | Radiology, University of Rochester Medical Center |
| | Compression of medulla oblongata impairs the respiratory control mechanisms, resulting in apnea or sudden death [2,3]. | | | The foramen magnum may be further compromised by the anterior extension of a squama of occiput or by thickening of posterior rim of the foramen magnum. | | | This narrowing is most significant between the transverse ligament and the posterior foramen magnum. |
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http://www.urmc.rochester.edu/smd/Rad/neurocases/Neurocase129.htm
(351 words)
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| | Neuroradiology Teaching Files |
| | It is a congenital malformation characterized by elongated cerebellar tonsils that are caudally pointed and displaced inferiorly through the foramen magnum. | | | A now hyperintense area is surrounded by normal intensity spinal cord just below the level of the foramen magnum. | | | A hypointense area is surrounded by normal intensity spinal cord just below the foramen magnum. |
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http://www.uchsc.edu/sm/neuroimaging/T893B/T893B.htm
(374 words)
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| | FORAMEN - Definition |
| | {Foramen of Monro} (Anat.), the opening from each lateral into the third ventricle of the brain. | | | A foramen is an opening or communication between two cavities. | | | {Foramen of Winslow} (Anat.), the opening connecting the sac of the omentum with the general cavity of the peritoneum. |
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http://www.hyperdictionary.com/dictionary/foramen
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| | Spinal Cord Structure |
| | The spinal cord extends from the brainstem through the foramen magnum and down the vertebral column. | | | It is a long canal with continuous tracts and cell columns. |
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http://www.cbv.ns.ca/spinalcordinjuries/spinal1.htm
(237 words)
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| | MRI Scan Criteria |
| | The goal of the MRI scan should be to demonstrate adequacy of the foramen magnum region and cervical canal. | | | 2) Coronal cuts done perpendicular to the plane of the foramen magnum to demonstrate cerebellar tonsils within the foramen, but not necessarily extending below it and portion on the brain stem. | | | This can be accomplished well with T1 images. |
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http://home.att.net/~potsweb/mricriteria.html
(158 words)
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| | Foramen - Wikipedia, the free encyclopedia |
| | the patent foramen ovale is a hole between the venous and arterial sides of the heart. | | | This page was last modified 10:33, 5 July 2005. | | | the foramen magnum is the opening at the bottom of the skull. |
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http://www.wikipedia.org/wiki/Foramen
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| | Chapter 13 Ancient Man Part 1 |
| | And the openings at their bases, the foramens magnums, had been widened and smashed, as if someone had wanted to scoop out the brains."—*Ibid. | | | A skull’s capacity is determined by pouring seeds or buckshot into the large hole at the base of the skull (foramen magnum), then emptying the pellets into a measuring jar. | | | Twenty years later, in the 1950s, *Ernst Mayr came up with a new name, Homo erectus, and then put a variety of bone finds (Java Man, Peking Man, and several others) into it. |
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http://www.evolution-facts.org/Ev-Crunch/c13a.htm
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| | Foramen Magnum Herniation |
| | Cerebellar tonsils compressed through foramen magnum squashing brainstem (medulla) |
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http://medlib.med.utah.edu/calendar/block4/ppt_coma2002/sld027.htm
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| | Calcified Foramen Magnum Meningioma:view |
| | This tumor successfully removed using a lateral approach. | | | The dura was coagulated after the tumor was removed (B). | | | A calcified foramen magnum meningioma in an elderly woman. |
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http://www.neuro.utmem.edu/view/6201.html
(51 words)
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| | MSN Encarta - Dictionary - foramen magnum |
| | Click here to search all of MSN Encarta | | | Search for "foramen magnum" in all of MSN Encarta |
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http://ca.encarta.msn.com/dictionary_1861690626/foramen_magnum.html
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