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Anatomy of Nasal Cavity and Sinuses
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Anatomy of Nasal Cavity and Sinuses

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@DashingTechnetium

Questions and Answers

Which of the following structures is NOT part of the nasal turbinates?

  • Vomer Bone (correct)
  • Middle Concha
  • Superior Concha
  • Inferior Concha

    • The inferior meatus provides an opening for the ostium of maxillary sinus.

    False

    What are the primary functions of turbinates?

    Guide airflow, heat air, humidify air

    The __________ is a bony shelf of bone in the nasal cavity, usually having three on each side.

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

    Match the meatus with its notable contents:

    <p>Superior Meatus = Ostia for posterior ethmoidal air cells Middle Meatus = Ostium for maxillary sinus Inferior Meatus = Opening for nasolacrimal duct</p> Signup and view all the answers

    What is a common clinical sign of a fracture of the cribriform plate?

    <p>CSF Rhinorrhoea</p> Signup and view all the answers

    The superior and middle conchae are part of the ethmoid bone.

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

    Which structure drains through the ethmoidal bulla?

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

    The inferior conchae articulate laterally with their ipsilateral __________.

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

    Match the following clinical conditions with their descriptions:

    <p>CSF Rhinorrhoea = Cerebrospinal fluid leakage from the nose Anosmia = Loss of smell Empty Nose Syndrome = Paradoxical nasal obstruction after turbinectomy Dehiscence of Lamina Papyracea = Congenital anomaly with possible fat prolapse</p> Signup and view all the answers

    What consequence may arise from a turbinectomy?

    <p>Empty Nose Syndrome</p> Signup and view all the answers

    The inferior nasal conchae are part of the cranial skeleton.

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

    Name one type of air cell found in the ethmoid bone.

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

    What is the primary function of the turbinates in the nasal cavity?

    <p>To humidify and filter air</p> Signup and view all the answers

    The nasal cavity extends from the anterior nares to the oropharynx.

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

    Name the two types of cartilage found in the nose.

    <p>Lateral cartilage and alar cartilage</p> Signup and view all the answers

    The nasal septum divides the nasal cavity into __________ halves.

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

    Match the components of the nasal cavity to their description:

    <p>Posterior nares = Also known as choanae Lateral walls = Two walls that form the sides Median wall = Another term for the nasal septum Floor = Base of the nasal cavity</p> Signup and view all the answers

    Which of the following structures does NOT form part of the nasal septum?

    <p>Lateral cartilage</p> Signup and view all the answers

    The blood supply to the nasal cavity is exclusively provided by the carotid artery.

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

    What is the primary educational material recommended for this course?

    <p>Moore’s Clinically Oriented Anatomy</p> Signup and view all the answers

    What is the function of the Eustachian Tube?

    <p>To connect the nasopharynx to the middle ear</p> Signup and view all the answers

    The paranasal sinuses serve to lighten the load of the cranium.

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

    What are the adenoids also known as?

    <p>Pharyngeal tonsils</p> Signup and view all the answers

    Which arteries contribute to Kiesselbach's plexus?

    <p>All of the above</p> Signup and view all the answers

    The __________ is the part of the throat that connects the nasal cavity to the mouth.

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

    What can chronic paranasal sinusitis lead to?

    <p>Middle ear infections</p> Signup and view all the answers

    The main function of Kiesselbach's plexus is to provide oxygen to the blood.

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

    Match the tonsils with their locations:

    <p>Palatine tonsil = Sides of the oral cavity Lingual tonsil = Base of the tongue Pharyngeal tonsil = Posterior nasopharynx Tubal tonsil = Near torus tubularis</p> Signup and view all the answers

    What clinical condition is associated with Kiesselbach's plexus?

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

    The sensory distribution of the nasal cavity is primarily provided by branches of the __________ nerve.

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

    What is the perceived sound when the Eustachian Tube opens during swallowing?

    <p>Popping sound</p> Signup and view all the answers

    Match the following terms related to the nasal cavity with their descriptions:

    <p>Kiesselbach's plexus = Arterial supply associated with nosebleeds Epistaxis = Medical term for a nosebleed Sphenopalatine ganglion = Nerve structure involved in nasal sensations Olfactory nerve = Responsible for the sense of smell</p> Signup and view all the answers

    Waldeyer's Ring is a group of lymphoid tissue aggregations in the oral cavity.

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

    Study Notes

    Overview of Nasal Cavity and Paranasal Sinuses

    • Course conducted by Dr. Arman Rahman, MD, MPH, Ph.D.
    • Duration approximately 45 minutes, associated with MDSA20200 Introduction to Respiratory Biology.
    • Assessment includes end-of-trimester examination (100%), with component breakdown: Anatomy SAQs (30%), Physiology SAQs (20%), Physiology Essays (50%).

    Anatomy Structure

    • Nasal Cavity: Extends from anterior nares (nostrils) to posterior nares (choanae).
    • Components of Nasal Septum: Made up of the perpendicular plate of the ethmoid bone, vomer bone, and septal cartilage.
    • Lateral Walls: Contains superior, middle, and inferior turbinates, which are important for airflow regulation.

    Turbinates and Meatuses

    • Turbinates: Function to guide, heat, and humidify air. Comprises conchae, with three on each side.
    • Meatuses: Spaces beneath turbinates where drainage occurs; includes superior, middle, and inferior meatuses with notable openings for ethmoidal air cells and the nasolacrimal duct.

    Ethmoid Bone

    • Contributes to the nasal cavity's structure and contains anterior, middle, and posterior air cells.
    • Clinical relevance includes fractures leading to CSF rhinorrhoea or anosmia due to trauma.

    Nasopharynx

    • Extends from posterior nares to oropharynx and contains the Eustachian tube and adenoids.
    • Eustachian Tube: Connects nasopharynx to middle ear, helps equalize pressure; dysfunction linked to middle ear infections.

    Paranasal Sinuses

    • Air-filled cavities that lighten the cranium, humidify inhaled air, and play a role in immune response.
    • Kiesselbach's plexus located in Little's area contributes to nasal blood supply and is clinically significant for epistaxis (nosebleeds).

    Clinical Insights

    • Turbinate Hypertrophy: Treated with turbinectomy but may lead to Empty Nose Syndrome, characterized by paradoxical nasal obstruction.
    • Eustachian Tube Dysfunction: Can lead to otitis media from chronic sinusitis.
    • Moore’s Clinically Oriented Anatomy, focusing on chapters related to thorax and head for deeper anatomical understanding.

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    Description

    Explore the intricacies of the nasal cavity and paranasal sinuses in this lecture by Dr. Arman Rahman. Dive deep into the structure and function of the upper respiratory system, understanding its role in overall respiratory biology. Ideal for students enrolled in MDSA20200.

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