单词	foramen magnum
释义	foramen magnum /ˈmaɡnəm / noun Anatomy The hole in the base of the skull through which the spinal cord passes.The cysts may localize anywhere within the CNS, but are often found at the base of the brain around the foramen magnum or surrounding the spinal cord.... Located at the base of the skull, the medulla oblongata is continuous with the spinal cord at the foramen magnum. At the level of the foramen magnum, where the spinal cord ends and the medulla oblongata begins, the gray matter undergoes a marked reorganization. Origin Latin, 'large opening'.
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