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The sphenoethmoidal recess is a small triangular space superior to the superior nasal meatus of the nasal cavity into which the sphenoidal sinus [1] [2] [3] opens. [4] The sphenoethmoidal recess is situated supero posterior to the superior nasal concha, [3] [2] between the superior nasal concha and the anterior aspect of the body of the sphenoid bone.
Posteriorly, an opening of sphenoidal sinus opens into the sphenoidal sinus by an aperture high on the anterior wall the sinus; anteriorly, an opening of sphenoidal sinus opens into the roof of the nasal cavity via an aperture on the posterior wall of the sphenoethmoidal recess, just over the choana. [4]
The posterior ethmoidal cells drain directly into the superior nasal meatus [3] [5] at the sphenoethmoidal recess; [5] sometimes, one or more opens into the sphenoidal sinus. [ 4 ] Lamellae
Above and at the back of the superior concha is the sphenoethmoidal recess which the sphenoidal sinus opens into. The superior meatus occupies the middle third of the nasal cavity’s lateral wall. The middle meatus is the middle-sized and located nasal opening, lying underneath the middle concha and above the inferior concha where the meatus ...
Kiesselbach's plexus is an anastomosis of four or five arteries: the anterior ethmoidal artery, a branch of the ophthalmic artery, a branch of the internal carotid artery.
Superior to the superior nasal concha is the sphenoethmoidal recess where the sphenoid sinus communicates with the nasal cavity; the sphenoethmoidal recess is interposed between the superior nasal concha, and (the anterior aspect of) the body of sphenoid bone. [1]: 692 The sphenoid sinus ostium exists medial to the superior turbinate. [2]
Olfactory mucosa lines about 5cm 2 of the posterosuperior parts of the lateral nasal wall. Parts of the nasal cavity lined by olfactory mucosa include: parts of the roof of the nasal cavity, the superior nasal concha and some upper parts of the middle nasal concha, parts of the nasal septum, and the sphenoethmoidal recess.
The frontonasal duct is a duct through which either frontal sinus drains into the nasal cavity. [2] [3] Each frontal sinus opens into the frontonasal duct by an opening (the opening of frontal sinus or frontal sinus aperture [4]) on the inferomedial part [3] of the floor of the sinus. [4]