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Comparison between CV4 and EV4 - Osteopathic Research

Comparison between CV4 and EV4 - Osteopathic Research

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9<br />

fig. 1<br />

occipital bone<br />

2.1 Occipital bone<br />

The interface used to conduct the <strong>CV4</strong> <strong>and</strong> <strong>EV4</strong> cranial techniques is the<br />

occipital bone, the posterior base of the cranium. It consists of the basilar part,<br />

the squamous portion <strong>and</strong> the two condylar parts. The occipital bone is a part of<br />

the posterior cranial fossa, <strong>and</strong> together with the sphenoid, constitutes the SBS<br />

(sphenobasilar-symphysis). It is in contact through sutures laterally with the<br />

temporal bone, on top with the parietal bone <strong>and</strong> at the bottom with the condylar<br />

parts. The IX., X., XI. cranial nerves, the jugular vein, the inferior petrosus sinus<br />

<strong>and</strong> sigmoid sinus <strong>and</strong> the posterior meningeal artery all go through the jugular<br />

foramen, the opening located <strong>between</strong> the temporal bone <strong>and</strong> the occipital bone.<br />

A large part of the venal blood, approximately 80%, is drained via the jugular<br />

vein. Dural tensions or restrictions in the region of the jugular foramen can<br />

influence the function of the structures passing through it.<br />

Margit Grill / 2006

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