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CHP8 Skeletal; Cranial Bones and Their Markings; Occipital

Occipital Forms the posterior part of the cranial floor and walls
Foramen Magnum Hole through which the spinal cord enters the cranial cavity
Occipital Condyles Convex, oval processes on either side of the foramen magnum; articulate with depressions on the first cervical vertebrae
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
Superior nuchal line Curved ridge extending laterally from the external occipital protuberance
Inferior nuchal line Less well defined ridge paralleling the superior nuchal line a short distance below it
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.
Created by: Jgiron6994



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