Ethmoidal infundibulum
Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters". The ethmoidal infundibulum is a funnel-shaped[1]/slit-like[2]Template:Rp/curved[3] opening[1]/passage[4]/space[2]Template:Rp/cleft[3] upon the anterosuperior portion of the middle nasal meatus[1] (and thus of the lateral wall of[2] the nasal cavity[1]) at the hiatus semilunaris[3][5] (which represents the medial extremity of the infundibulum[2]). The anterior ethmoidal air cells (and also medial ethmoidal air cells - variation),[4][2]Template:Rp and (usually[2]Template:Rp) the frontonasal duct (which drains the frontal sinus[1][4])[1][4][2]Template:Rp open into the ethmoidal infundibulum.[1] The ethmoidal infundibulum extends anterosuperiorly from its opening into the nasal cavity.[3][2]Template:Rp
Anatomy
The ethmoidal infundibulum is bordered medially by the uncinate process of the ethmoid bone, and laterally by the orbital plate of the ethmoid bone. Hiatus semilunaris and hiatus maxillaris are covered by a layer of tissue and therefore the ethmoidal infundibulum is the folloving part of the "tunnel" leading to meatus nasi medius.[3]
The ethmoid infundibulum leads towards the maxillary hiatus.[2]Template:RpThe anterior ethmoidal cells open into the anterior part of the infundibulum.[6]
Variation
The frontonasal duct may or may not drain into the ethmoidal infundibulum - this is determined by the place of attachment of the uncinate process of the ethmoid bone: if the uncinate process is attached to the lateral nasal wall, the frontonasal duct will open directly into the middle nasal meatus; if otherwise, it will drain into the infundibulum.[2]Template:Rp In slightly over 50% of subjects, it is directly continuous with the frontonasal duct. When the anterior end of the uncinate process fuses with the anterior part of the bulla, however, this continuity is interrupted and the frontonasal duct then drains directly into the anterior end of the middle meatus.[6]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e f g Script error: No such module "citation/CS1".
- ↑ a b c d e f g h i j Script error: No such module "citation/CS1".
- ↑ a b c d e Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
Script error: No such module "Check for unknown parameters".
External links
- Atlas image: rsa2p6 at the University of Michigan Health System
Template:Nose anatomy Template:Portal bar Template:Authority control