dislocation--a pathologic study of twelve traffic fatalities.
Then, the authors suggest that the CT finding of bilateral occipito-atlanto-axial joint complex injury (defined as either bilateral occipital condyle fractures or unilateral occipital condyle fracture with contralateral widening of the occipitoatlantal
[> 2 mm] or atlantoaxial [> 3 mm] joint) be used as a marker for instability (14).
The opening was succeeded by a fibrous band running from frontal bone over parietal to occipitoatlantal
The slaughtered animals were hung to remove the skin, head (at the occipitoatlantal
joint), forefeet (at the carpal-metacarpal joint), hind feet (at the tarsal-metatarsal joint), gastrointestinal tract and visceral organs.
With disease progression, the occipitoatlantal
complex involvement becomes significant and cranial settling develops.
Garrett M, Consiglieri G, Kakarla UK, Chang SW, Dickman CA 2010 Occipitoatlantal
Dislocation Neurosurgery 66 A48-A55
Another imaging challenge is the radiography of uncommon cervicocranial injuries such as occipitoatlantal
dissociation and atlantoaxial rotation.
When the goats were slaughtered, their heads were severed at the occipitoatlantal
joint and processed according to the hot water maceration techniques to Tasbas & Tecirlioglu (1996) and the University of Arizona cooperative and extension paper on cleaning and skull preparation (1999) which briefly were:
We found no screws penetrating the occipitoatlantal
3 mm increase of basion-atlas interval), anterior flexion of the occipitoatlantal
joint (8 degree decrease of clivus-axis angle), increased basilar impression, and cerebellar ptosis with downward displacement of cerebellar tonsils to C-1 (white arrow).
Bouillot P, Fuentes S, Dufour H, Manera L, Grisoli F:Imaging features in combined atlantoaxial and occipitoatlantal
Head weight: The heads were severed at the occipitoatlantal
joint and weights taken using a "Five goat" spring scale[R].