What is the functional anatomy relevant to nasal fractures?

Updated: Dec 06, 2018
  • Author: Samuel J Haraldson, MD; Chief Editor: Craig C Young, MD  more...
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The lay term nose consists of bone and cartilage. The nasal septum, a commonly injured structure, consists of the vomer, the perpendicular plate of the ethmoid, and the quadrangular cartilage. Paired protrusions from the frontal bones and the ascending processes of the maxilla complete the bony component. The upper lateral and lower lateral cartilages, as well as the cartilaginous septum, compose the nonbony portion.

The blood supply occurs via branches of the ophthalmic artery, the ethmoidal and dorsal arteries, the facial artery, the nasopalatine, the sphenopalatine, and the greater palatine arteries. Sensation results from many small nerve branches; the external surface superiorly receives sensation from the supratrochlear and infratrochlear nerves, and the inferior portion receives sensation from branches of the infraorbital and anterior ethmoidal nerves. Internally, sensation is supplied by branches of the anterior ethmoidal ganglion and the sphenopalatine ganglion.

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