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The frontal crest of the frontal bone ends below in a small notch which is converted into a foramen, the foramen cecum (or foramen caecum), by articulation with the ethmoid. This foramen varies in size in different subjects, and is frequently impervious; when open, it transmits the emissary vein from the nose to the superior sagittal sinus. This has clinical importance in that infections of the nose and nearby areas can be transmitted to the meninges and brain from what is known as the danger triangle of the face. ==Additional images== File:Gray568.png|Sagittal section of the skull, showing the sinuses of the dura. File:Skull foramina labeled.svg| Photo with foramina of skull labeled. Foramen cecum is labeled at the top right. File:Base of skull 1.jpg|Foramen cecum File:Slide5jjjj.JPG|Foramen cecum 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Foramen cecum (frontal bone)」の詳細全文を読む スポンサード リンク
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