Types of the hypoglossal canal.

ABSTRACT

A study on frequencies of various types of the hypoglossal canal was done on 187 Thai skulls, 123 males and 64 females. Type 1 was the most predominant type, found on either right or left side. Type 2, 3 and 4 appeared less respectively. Type 5 was the lest common type, found in only one skull and on only one side. The comparison with European, Egyptian and American Indian skulls showed the difference in frequencies with statistically significance.