CHP8 Skeletal; Cranial Bones and Their Markings; Occipital
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Occipital | Forms the posterior part of the cranial floor and walls
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Foramen Magnum | Hole through which the spinal cord enters the cranial cavity
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Occipital Condyles | Convex, oval processes on either side of the foramen magnum; articulate with depressions on the first cervical vertebrae
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External Occipital Protuberance | Prominent projection on the posterior surface in the midline a short distance above the foramen magnum; can be felt as a definite bump
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Superior nuchal line | Curved ridge extending laterally from the external occipital protuberance
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Inferior nuchal line | Less well defined ridge paralleling the superior nuchal line a short distance below it
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Internal Occipital Protuberance | Projection in the midline on the inner surface of the bone; grooves for the lateral sinuses extend laterally from this process and one for sagittal sinus extends upward from it.
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