Existence and features of the myodural bridge in Gentoo penguins: A morphological study
Fig 3
Gentoo penguin, prepared sagittal section of the suboccipital region with stained with HE.
Area within square in a is shown enlarged in b, c, and d. The fibers (arrow) originate from the ventral anterior of RCDmi, extend directly into the atlanto-occipital interspace, then fuse with the DAOM, and the DAOM extends into a fiber bundle through the venous sinus to connect with the SDM (hollow triangle). In the atlanto-axial interspace, the dense fibers bundles (arrow) originating from the ventral side of the RCDmi run ventrally run ventrally, and integrate into the dorsal atlanto-axial membrane (hollow crescent) together with the dense fibers(filled arrowhead) originating from the RCDma and OCP, and send out dense fibers bundles to closely connect with the SDM. Abbreviation: OCCI = occipital bone; RCDmi = rectus capitis dorsalis minor muscle; OCP = oblique capitis posterior; DAOM = dorsal atlanto-occipital membrane; SDM = spinal dura mater; C1 = atlas; C2 = axial; V = venous sinus.