Petro-occipital fissure
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| Petro-occipital fissure | |
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| Base of the skull. Upper surface. (Petro-occipital fissure is not labeled, but petrous portion is bottom part of temporal bone, in pink, and occipital bone is at bottom, in blue.) | |
| Latin | fissura petrooccipitalis |
| Gray's | subject #47 193 |
| Dorlands/Elsevier | f_08/12365616 |
This grooved surface of the foramen magnum is separated on either side from the petrous portion of the temporal by the petro-occipital fissure, which is occupied in the fresh state by a plate of cartilage; the fissure is continuous behind with the jugular foramen, and its margins are grooved for the inferior petrosal sinus.
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