Flashcards in Lecture 6: Nasal And Oral Cavities Deck (25)
Meatus are natural canals inferior to the nasal conchae.
Most paranasal sinuses drain to?
Middle nasal meatus
Memorise the picture on slide 10
What divides the nasal cavity into two chambers?
What are choanae? "Funnels
-point of transition from nasal cavity to nasopharynx
Why do you have to sniff to really smell something?
Because the respiratory area in the nasal cavity is before th olfactory area were odours are detected.
What is the nerve innervation of the nasal cavity?
Anterosuperior= ophthalmic nerve (CN V1)
Posteriorsuperior= maxillary nerve (CN V2)
What are the 4 paired paranasal sinuses?
What is the function of the paranasal sinuses?
-they are lined with respiratory epithelium (pseudostratified columnar with cilia)
-filled with air => lightens weight of viscerocranium
-communicate with nasal cavity through small Ostia
-assist in warming and humidifying inspired air
-add some resonance to voice
-drain mucus to nasal cavities via cilia
We're would you palpate all of the sinuses?
Refer to slide 19
How are each of the paranasal sinuses innervated?
Infraorbital nerve- pain refers to dental arch slide 23
What is rhinosinusitis?
Inflammation of paranasal sinuses (usually ethmoid and maxillary)
Caused by obstruction of discharge of normal sinus secretions which compromises normal sterility.
-nasal congestion, facial pain/ pressure, fever, headache, painful maxillary teeth
Study the picture of the nasopharynx, oropharynx, and laryngopharynx.
Pharyngeal tonsils. What are they, what's their purpose?
They are adenoids which trap and destroy pathogens entering nasopharynx in air
What closes during swallowing go prevent food entering the nasal cavity?
What area is covered by the ora vestibule and the oral cavity proper slide 36
Oral vestibule: space between teeth and cheeks
Oral cavity proper: space between upper and lower dental arches
Learn slide 39 - mandible
Learn slide 41- teeth
What vessels supply the:
Maxillary Upper dental arch
Mandibular lower dental arch
Superior alveolar artery
Inferior alveolar artery
Both arteries branch from Maxillary artery
What nerve innervated the gingivae and teeth?
Mandibular nerve CN V3
Which the superior alveolar nerve and inferior alveolar nerve branches off
What are the 5 muscles of the soft palate?
And their blood supply, venous drainage, sensory and motor nerves
-tensor veli palatini
-levator veli palatini
Blood supply: gated palatine (branch of maxillary artery)
Venous drainage: pterygoid venous plexus
Sensory: glossopharyngeal CN 9
Memorise slide 46- tongue
Extrinsic muscles late position of tongue
Intrinsic muscles alter shape of tongue
Motor innervation: hypoglossal nerve (CN 12)
What are the muscles of the below tongue?
Know how to label them. Slide 48
What is the blood supply to the tongue
External carotid artery
Innervation of the tongue. Slide 51