Nasal Cavity
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Questions and Answers

What is the function of the paranasal sinuses?

  • To produce mucus
  • To transmit electrical signals
  • To regulate body temperature
  • To provide vocal resonance and lighten the skull bones (correct)

    • What innervates the mucosa of the paranasal sinuses?

  • Trigeminal nerve branches (correct)
  • Vagus nerve branches
  • Accessory nerve branches
  • Facial nerve branches

    • Which bone divides the nasal cavity into two parts?

  • Sphenoid bone/ Maxillary bone
  • Ethmoid bone/Vomer (correct)
  • Maxillary bone/ Temporal bone
  • Frontal bone/ Ethmoid bone

    • What is the function of the vestibule in the nasal cavity?

    <p>Entrance to the nasal cavity</p> Signup and view all the answers

    Where are the conchae found in the nasal cavity?

    <p>On the lateral wall</p> Signup and view all the answers

    Which area of the nasal cavity is involved in olfaction?

    <p>the upper 1/3</p> Signup and view all the answers

    Which area on the anterior aspect of the nasal septum is where 5 arteries anastomose?

    <p>Kiessebach's area</p> Signup and view all the answers

    Which meatus is inferior to the superior concha and drains the posterior ethmoid air cells?

    <p>Superior meatus</p> Signup and view all the answers

    What structure drains the inferior meatus?

    <p>Nasolacrimal duct</p> Signup and view all the answers

    From which artery does the anterosuperior blood supply of the nasal cavity primarily come?

    <p>Ophthalmic artery</p> Signup and view all the answers

    Which nerve provides innervation to the anterosuperior part of the nasal cavity?

    <p>Nasociliary nerve (branch of ophthalmic nerve V1)</p> Signup and view all the answers

    What drains into the sphenoidal sinus?

    <p>Posterior ethmoid air cells</p> Signup and view all the answers

    Which artery does NOT contribute to the blood supply in Kiesselbach’s area?

    <p>Lateral nasal wall artery</p> Signup and view all the answers

    Which of the following is the pterygopalatine fossa not a 'distribution center' for?

    <p>Lingual nerve</p> Signup and view all the answers

    Where does the maxillary artery give off branches to in the pterygopalatine fossa?

    <p>Palate and nasopharynx</p> Signup and view all the answers

    What type of fibers originate from the Superior Cervical Ganglion into the pterygopalatine fossa?

    <p>Sympathetic fibers</p> Signup and view all the answers

    Which part of the face does the Maxillary nerve not give GSA branches to?

    <p>Forehead</p> Signup and view all the answers

    Where does the Maxillary artery travel after supplying muscles of mastication?

    <p>Infratemporal fossa</p> Signup and view all the answers

    Which of the following bones is the paranasal sinus not found in

    <p>Temporal</p> Signup and view all the answers

    Which of the following is not found in the middle meatus?

    <p>Posterior ethmoid air cells</p> Signup and view all the answers

    What drains in the sphenoethmoidal recess?

    <p>Sphenoidal sinus</p> Signup and view all the answers

    What is the pharyngotympanic tube?

    <p>The auditory tube</p> Signup and view all the answers

    What is the blood supply for the posteroinferior portion of the nasal cavity?

    <p>Maxillary artery</p> Signup and view all the answers

    What innervates the posteroinferior aspect of the nasal cavity?

    <p>Maxillary nerve (V2</p> Signup and view all the answers

    What are the boundaries of the pterygopalatine fossa?

    <p>Pterygoid process of the sphenoid bone and the posterior aspect of the maxilla</p> Signup and view all the answers

    The pterygopalatine (GVEp) ganglion is suspended from The Maxillary division of Trigeminal (V2) in the pterygopalatine fossa. Postsynaptics hitchhike on branches of V2 to reach their targets

    <p>True</p> Signup and view all the answers

    Study Notes

    Functions and Anatomy of Nasal Cavity

    • Paranasal sinuses function for mucous production, warming, humidifying, and filtering the air we breathe
    • Mucosa of paranasal sinuses is innervated by the pterygopalatine ganglion

    Nasal Cavity Structure

    • The nasal cavity is divided into two parts by the nasal septum, which is formed by the vomer bone
    • The vestibule is the anterior part of the nasal cavity, responsible for filtering, warming, and humidifying the air
    • Conchae are found in the nasal cavity, curled, mucous membrane-covered shelves that warm, humidify, and filter the air
    • Olfaction occurs in the olfactory epithelium, located in the superior part of the nasal cavity
    • The anterior aspect of the nasal septum has an area where 5 arteries anastomose
    • The inferior meatus drains the inferior concha, and the middle meatus is inferior to the superior concha, draining the posterior ethmoid air cells

    Blood Supply and Innervation

    • The anterosuperior blood supply of the nasal cavity comes primarily from the internal carotid artery
    • The ophthalmic artery, a branch of the internal carotid artery, also supplies the nasal cavity
    • The anterosuperior part of the nasal cavity is innervated by the anterior ethmoidal nerve

    Paranasal Sinuses

    • The sphenoidal sinus drains into the sphenoethmoidal recess
    • The maxillary sinus, frontal sinus, and ethmoid sinus are all paranasal sinuses

    Pterygopalatine Fossa

    • The pterygopalatine fossa is a 'distribution center' for the nasal cavity, except for the olfactory epithelium
    • The maxillary artery gives off branches to the nasal cavity and palate in the pterygopalatine fossa
    • The superior cervical ganglion sends post-ganglionic sympathetic fibers to the pterygopalatine fossa
    • The pterygopalatine ganglion is suspended from the maxillary division of the trigeminal nerve (V2) in the pterygopalatine fossa

    Other

    • The maxillary nerve (V2) gives GSA (general somatic afferent) branches to the face, except for the angle of the mandible
    • The maxillary artery travels through the infraorbital canal after supplying muscles of mastication
    • The paranasal sinuses are not found in the occipital bone
    • The middle meatus does not contain the uncinate process
    • The pharyngotympanic tube connects the middle ear to the nasopharynx
    • The posteriorinferior portion of the nasal cavity receives blood supply from the superior labial branch of the facial artery
    • The posteroinferior aspect of the nasal cavity is innervated by the posterior superior alveolar nerve

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    Description

    This quiz covers learning objectives related to the nasal cavity, paranasal sinuses, pterygopalatine fossa, and major arteries supplying the lateral wall and nasal septum. Test your knowledge on these anatomical structures and their innervations.

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