Nasal Stuff, 3 Nov 2006

Courtney Takahashi Anatomy 7 3 November 2006 The Nose Knows Surface Anatomy • Lateral nasal cartilages • Alar nasal cartilage • Septal cartilage • Alar fibrofatty tissue (personal edification only) Nasal Cavity • Nostril • Vestibule (aperature of nostril) • Choana (remember not a structure, Netters, plate 33) • Perpendicular plate of ethmoid • Vomer (Netters plate 6) • Septal cartilage (Netters plate 6) • Superior nasal concha (Netters plate 33) • Superior nasal meatus (Netters plate 33) • Middle nasal concha (Netters plate 33) • Middle nasal meatus (Netters plate 33) • Inferior nasal concha (Netters plate 33) • Inferior nasal meatus (Netters plate 33) • Bulla ethmoidalis (Netters plate 33, lower diagram) o Bulla ethmoidalis is a bony projection of the side wall displaced into the nasal cavity due to the protrusive middle ethmoidal air cells • Uncinate process (Netters plate 33, lower diagram) o Curved ridge inferior to the bulla • Hiatus semilunaris (Netters plate 33, lower diagram) o Intervening deep groove, frontonasal duct will enter anterior portion • Nasolacrimal duct (opening) (Netters plate 33, lower diagram) • Sphenoidal sinus (Netters 33) • Frontal sinus (Netter 33) • Maxillary sinuss (netter 33) • Pharyngotympanic tube, opening (Netters 33) Blood Supply (netter plate 37) • Sphenopalatine artery • Ophthalmic artery (Netter plate 36) • Greater and Lesser palatine arteries • Facial artery Nerves • Nasopalatine (Netter plate 39) • Greater and Lesser palatine nerves (Netters plate 38) • External nasal from infraorbital nerve (Netter plate 38)

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Lateral nerves (?) Chorda tympani (Netters plate 42) Facial nerve (Netters plate 42) Hard Palate o Maxillary bone o Palatine bone Incisive foramen / Primary palate Palatine foramina (Posteriorly)

Muscles • Palatopharyngeus (Netter plate 60) • Palatoglossus (Netter plate 60) • Tensor veli palatini (Netter plate 61) • Levator veli palatini (netter plate 61) • Pharyngeal tonsil Thought Questions: What major structures would you expect to find in the nasal cavity? What are the boundaries of the nasal cavity? What is the purpose of nasal concha? How are the superior and middle concha structurally different from the inferior concha? What bones form the horizontal palate? What nerves innervate the maxillary teeth? What nerves innervate the gingiva?

Mucous membranes, CN1, pterygopalatine ganglion Floor: Maxilla, palatine bone Roof: nasal bone, ethmoid bone, frontal bone, sphenoid bones Increased surface area for glandular and vascular tissue to modify and filter air Superior and middle are processes of the ethmoid, inferior is a separate bone of the skull Maxillary bone, horizontal process of palatine bones Superior alveolar nerves Nasopalatine nerve (for teeth 1-3) and Greater palatine nerve (teeth 4-8)

Put it in the mother f*cking mouth Surface Anatomy • Mouth • Vestibule • Lips • Nasolabial sulcus • Mentolabial sulcus • Fenulum • Gingiva • Teeth Blood Supply • Inferior alveolar artery Muscles • Superior longitudinal • Inferior longitudinal

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Transverse Vertical Genioglossus