A handbook of diseases of the nose and nasopharynx / by James B. Ball.

  • Ball, James B. (James Barry), 1849-1926.
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: A handbook of diseases of the nose and nasopharynx / by James B. Ball. Source: Wellcome Collection.

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    \ action or otherwise, tends to shut off the vestibule from the cavity of the nasal fossa. The movements of the cartilaginous part are effected by certain small muscles, six in number. Of these the most im- portant are the compressor nasi and depressor alse nasi, which narrow the vestibule ; the dilatator naris, which en- larges the lower aperture by everting the ala, and the levator labii superioris alseque nasi, which draws up the upper lip and the ala. The skin on the outer surface of the nose is studded with numerous openings of sebaceous f olli cles, especially marked in the groove immedi- ately above tha ala. The skin is pro- longed into the nose so as to line the vesti- bules, and becomes continuous with the mucous membrane at the level of the lower border of the upper lateral carti- lage. Within the margin of the orifices of the nostrils are numerous short, stiff hairs, Yibrissse. The arteries of this region arise from branches of the facial. The veins end in the facial vein. The sensory nerves are derived from the nasal and iufra-orbital branches of the fifth, and the motor nerves arise from the seventh. Pio. 3. —Cartilaginous and Bony Septum seen from the left side. (From Quain after Arnold.) a, Cartilage of the septum ; b, the pei-pendioular plate of the ethmoid bone ; c, the vomer ; d, the right nasal bone; e, inner part of the right lower lateral cartilage ; /, the superior maxillary bone ; g, the sphenoidal sinus.