foramen magnum


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foramen magnum

n.
The large orifice in the base of the skull through which the spinal cord passes to the cranial cavity and becomes continuous with the medulla oblongata.

[New Latin forāmen magnum : Latin forāmen, opening + Latin magnus, large.]

foramen magnum

n
(Anatomy) the large opening at the base of the skull through which the spinal cord passes
[New Latin: large hole]

fora′men mag′num

(ˈmæg nəm)
n.
the large opening in the base of the skull through which the spinal cord merges with the brain.
[1880–85; < New Latin: literally, large hole]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.foramen magnum - the large opening at the base of the cranium through which the spinal cord passesforamen magnum - the large opening at the base of the cranium through which the spinal cord passes
braincase, brainpan, cranium - the part of the skull that encloses the brain
foramen, hiatus - a natural opening or perforation through a bone or a membranous structure
References in periodicals archive ?
TEHRAN (FNA)- Anthropology researchers from The University of Texas at Austin have confirmed a direct link between upright two-legged (bipedal) walking and the position of the foramen magnum, a hole in the base of the skull that transmits the spinal cord.
3) CSF studies also provide a better understanding of the pathophysiology of Chiari I malformation regarding the spatial and temporal foramen magnum CSF flow patterns (Figs 1c - e).
Dynamic magnetic resonance imaging reveals difficulties in cerebrospinal fluid circulation in the foramen magnum territory and disappearance of preoperative plateau waves after posterior fossa reconstruction in patients with secondary cough headache (6).
Scoop out the brain from the foramen magnum, the "big hole" where the spinal column enters the base of the head.
Magnetic resonance imaging (MRI) of his brain was obtained and revealed an extraaxial mass in the inferior fourth ventricle extending through the foramen magnum and impressing upon the pontomedullary junction and medulla with posterior compression of the cerebellar tonsils.
Other practices which were part of the ritual of headhunting described by Hose could be observed, like widening of foramen magnum, burning of skulls, mandible tied to the cranium with a strip of rattan or cotton, as well as drilled perforations to suspend skulls in longhouses.
Normally the cerebellum and parts of the brain stem sit in an indented space at the lower rear of the skull, above the foramen magnum (a funnel-like opening to the spinal canal).
The cervical spinal cord demonstrated moderate enlargement from the foramen magnum to C7, with a maximum caliber of 9 mm.
Part of the brain, called the cerebellum, is forced out through the foramen magnum, a hole at the base of the skull.
Cervical X-rays showed basilar invagination consistent with the superior part of the odontoid proces being displaced into the foramen magnum.
foramen magnum narrowing, spinal stenosis, upper respiratory narrowing) of nervous tissues or other tissues.