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Basioccipital and basisphenoid. We examined 686 skulls of 420 species of microchiropteran bats in 16 families to assess variation in pits in the basisphenoid and basioccipital bones. Basisphenoid bone in reptiles birds and many mammals a bone located at the base of the skull. Vestibular signs hemorrhage from nostrils or ear behavior changes seizures tetraparesis.
When fused the synchondrosis is often called the spheno occipital suture this is a misnomer as anatomically it is not a suture. The basisphenoid and basiocciptal bones are located at the base of the calverium. Equally formed by the basioccipital and basisphenoid and not subdivided 0 subdivided by a lateral longitudinal groove into a medial part entirely basioccipital and a lateral part entirely basisphenoid 1.
Anat of or pertaining to that part of the base of the cranium between the basioccipital and the presphenoid which usually ossifies separately in the embryo or in the young and becomes a part of the sphenoid in the adult. Medical definition of basisphenoid entry 1 of 2. This ontology is also used by the rat genome database.
Anat the basisphenoid bone. The spheno occipital synchondrosis also known as the basiocciput synchondrosis is the synchondrosis between the basisphenoid and basiocciput bones which together when joined form the clivus. In humans the basisphenoid is present in the embryo but later.
It is immediately in front of the bone that contains the opening through which the brainstem projects to connect with the spinal cord. These bones sustain damage most frequently when horses rear over backward or run into objects and strike the poll of the head. Relating to or being the part of the base of the cranium that lies between the basioccipital and the presphenoid bones and that usually ossifies separately and becomes a part of the sphenoid bone only in the adult.
To find out the time of fusion of the basisphenoid with the basilar part of the occipital bone in northwest indian subjects a quadrilateral piece of bone extending from the posterior clinoid processes to the jugular tubercles was removed from 50 male and 34 female autopsy subjects between the ages of 10 and 20 years. A total of 26 measurements were used to descri.