Jugum cerebellare intersemilunarae in Thais.

ABSTRACT

The 117 occipital bones of Thais, 67 male, 50 female, were studied for Jugum Cerebellare Intersemilunarea. The origin of the Jugum Cerebellare Intersemilunarea began at the lower border of the groove for transverse sinus near the internal occipital crest. Then it passed downward and laterally ending at the lower-lateral angle of the occipital bone where foramen for the mastoid emissary veins is. Distance between the origins the internal occipital crest and the endings to the lower border of the groove for transverse sinus were measured. The Jugum Cerebellare Intersemilunarea was divided into 9 types; continuous, interrupted, medially and centrally, laterally and centrally, medially and laterally, medial only, lateral only, central only and absent. The types of Jugum Cerebellare Intersemilunarea in Thais were statistically significantly different from of the Europian. In Thais, comparisons between sex and side in both male and female were not found to have any statistically significant difference.