platybasia /platy·ba·sia/ (plat″ĭ-ba´zhah)
platybasia [plat″ĭ-ba´zhah]
2. malformation of the base of the skull due to softening of skull bones or a developmental anomaly, with bulging upwards of the floor of the posterior cranial fossa, upward displacement of the upper cervical vertebrae, and bony impingement on the brainstem.
plat·y·ba·sia (pl t  -b  zh )n. A developmental anomaly of the skull in which the base of the posterior cranial fossa bulges upward. |
platybasia [plat″ĭ-ba´zhah]
malformation of the base of the skull due to softening of skull bones or a developmental anomaly, with bulging upwards of the floor of the posterior cranial fossa adjacent to the foramen magnum, upward displacement of the upper cervical vertebrae, and bony impingement on the brainstem, accompanied by neurologic signs referable to the medulla oblongata. See also basilar invagination. Called also basilar impression.
platybasia
malformation of the base of the skull, with forward displacement of the upper cervical vertebrae and bony impingement on the brainstem. It is accompanied by neurological signs referable to the medulla oblongata, cervical spinal cord and cranial nerves. Called also basilar impression.
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