環椎における Ponticulus Posticus について -X線的観察-
1980 年 29 巻 4 号 p. 622-625
詳細
1980 年 29 巻 4 号 p. 622-625
The ponticulus posticus is a bony bridge connecting between the massa lateralis and the arcus posterior of atlas, under which the vertebral artery and suboccipital nerve pass. It is said that its essence is the ossification in the atlanto-occipital ligament.
We studied roentgenograms of the cervical spine of 394 patients consulted at Fukuoka University Hospital during last one year. The ponticulus posticus was found in 36 cases (9.2%). Sexual ratio is 1.5 to 1 (males and females). In age, it is more frequently seen in persons of adolescent and middle age comparatively.
