Each bone articulates in front with the ethmoid, laterally with the palatine; its pointed posterior extremity is placed above the vomer, and is received between the root of the pterygoid process laterally and the rostrum of the sphenoid medially.
42.
Internally, the "'lateral nasal wall "'is supplied with blood by the sphenopalatine artery ( from behind and below ) and by the anterior ethmoid artery and the posterior ethmoid artery ( from above and behind ).
43.
Internally, the "'lateral nasal wall "'is supplied with blood by the sphenopalatine artery ( from behind and below ) and by the anterior ethmoid artery and the posterior ethmoid artery ( from above and behind ).
44.
A small portion of the sphenoidal concha sometimes enters into the formation of the medial wall of the orbit, between the lamina papyracea of the ethmoid in front, the orbital plate of the palatine below, and the frontal bone above.
45.
The "'nasal septum "'also is supplied with blood by the sphenopalatine artery, and by the anterior and posterior ethmoid arteries, with the additional circulatory contributions of the superior labial artery and of the greater palatine artery.
46.
The postero-superior part of this cartilage is ossified to form the perpendicular plate of the ethmoid; its antero-inferior portion persists as the septal cartilage, while the vomer is ossified in the membrane covering its postero-inferior part.
47.
In 1979, Charles Walcott, James Gould and Joseph Kirschvink published a paper in Science announcing that they'd found microscopic particles of magnetite in the ethmoid region, the area between the nose opening and the front of the brain, in homing pigeons.
48.
On it is a curved fissure, the hiatus semilunaris, limited below by the edge of the uncinate process of the ethmoid and above by an elevation named the bulla ethmoidalis; the middle ethmoidal cells are contained within this bulla and open on or near to it.
49.
The lateral margin of the anterior surface is serrated, and articulates with the lamina papyracea of the ethmoid, completing the posterior ethmoidal cells; the lower margin articulates with the orbital process of the palatine bone, and the upper with the orbital plate of the frontal bone.
50.
Functional endoscopic sinus surgery differs somewhat from the conventional surgical approach to this problem in that it stresses a careful diagnostic workup to try to identify the underlying cause of the problem, frequently in the anterior ethmoid area, the area of the openings of the maxillary and frontal sinus.
