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The external nasal nerve passes inferior-ward through the lateral nasal wall. It provides sensory innervation to the area of skin of the nose between the nasal bones superiorly and the tip of the nose inferiorly (excluding the alar portion surrounding the external nares).
Nerves of the orbit, and the ciliary ganglion. Side view. (Nasociliary is at center.) Nerves of septum of nose. Right side. (Nasociliary is rightmost yellow line.) The nasociliary nerve is a branch of the ophthalmic nerve (CN V 1) (which is in turn a branch of the trigeminal nerve (CN V) ).
Most of the external nose – the dorsum, and the apex are supplied by the infratrochlear nerve, (a branch of the nasociliary nerve). [3] [13] The external branch of the anterior ethmoidal nerve also supplies areas of skin between the root and the alae.
Nerve supply Innervation of the nasal cavity responsible for the sense of smell is via the olfactory nerve , which sends microscopic fibers from the olfactory bulb through the cribriform plate to reach the top of the nasal cavity.
The nasal branches supply the skin of the side of the nose and the moveable part of the nasal septum. The superior labial branches descend deep to the levator labii superioris to supply the skin of the anterior cheek and upper lip. Relations. Along its course, the infraorbital nerve is accompanied by the infraorbital artery and vein.
This article describes the anatomy of the head and neck of the human body, including the brain, bones, muscles, blood vessels, nerves, glands, nose, mouth, teeth, tongue, and throat.
The nasopalatine nerve (also long sphenopalatine nerve: 496 ) is a nerve of the head. It is a sensory branch of the maxillary nerve (CN V 2 ) that passes through the pterygopalatine ganglion (without synapsing) and then through the sphenopalatine foramen to enter the nasal cavity , and finally out of the nasal cavity through the incisive canal ...
The ( medial and lateral) posterior superior nasal nerves are branches of the maxillary nerve (CN V2) [3] : 496 that arise in the pterygopalatine fossa from pterygopalatine ganglion [3] : 369–370 and pass through the sphenopalatine foramen into the nasal cavity [3] : 496 to innervate the nasal septum (the medial nerves), and the ...
The nasalis muscle is a sphincter-like muscle of the nose. It has a transverse part and an alar part. It compresses the nasal cartilages, and can "flare" the nostrils. It can be used to test the facial nerve (VII), which supplies it.
The medial crus is the inner portion of the major alar cartilages that are situated perpendicularly to the septal nasal cartilage. The lateral crus is the outer portion of the major alar cartilages that associate with the ala of the nose . Major alar and minor alar cartilages, seen from below.