Table XV

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Organ of smell

These are parasagittal sections of the nasal cavity, one with the nasal conchae and the other with the nasal septum, on which the distribution of their relevant nerves is shown . In the first, the lateral wall, we notice the terminals of the lateral part of the olfactory nerve that go upwards from the superior and middle conchae to the foramina of the cribriform plate of the ethmoid bone, and then enter the olfactory bulb (here it is left on site on the cribriform plate).

Then one can observe the lateral branches of the posterior nasal nerves of sphenopalatine ganglion (Meckel’s) that exit from the sphenopalatine foramen situated behind the middle concha and irradiate forwards over the latter and on the superior concha; moreover, the posterior inferior nasal nerves which detach from the anterior palatine nerve, behind the inferior concha, and spread over the latter.

Finally one can see the internal lateral nasal branch of the anterior ethmoid nerve of the nasociliary descending along the agger nasi (carina nasi). In the section with the medial wall of the nasal cavity one can see, spread over the nasal septum like a fan, the nerve fibres of the medial part of the olfactory nerve which goes to the foramina of the cribriform plate of the ethmoid to join the olfactory bulb . Just below it, but still on the septum, one can observe some of the medial branches of posterior superior nasal nerves; the bigger of these nerves, later penetrating the incisive canal, is the nasopalatine nerve (of Scarpa).

AdminTable XV