Flashcards in 7.1 The Nose and Paranasal Sinuses Deck (27)
Name 4 functions of the nose
Eliminate paranasal sinuses and nasolacrimal ducts
Name the bones which make up the bony part of the nose
Name the 2 cartilages found in the nose
Why do fractures to the nose take a long time to heal?
Cartilage heals slowly due to a poor blood supply
What is the medial wall of the nose made of?
Made of cartilage and bone
What is the condition called when the medial septum of the nose undergoes necrosis?
Saddle nose deformity
Describe the structure of the lateral walls of the nasal cavity
3 bony plates called conchae leading to the opening into the nasal cavity
What is the function of the conchae?
Create turbulent air flow which heats and humidifies the air
Which 3 groups of structures drain into the nasal cavity?
Name the 3 structures which enter into the nasal cavity at the semilunar hiatus at the level of the middle meatus
Anterior ethmoidal sinus
Name the structure which enters into the nasal cavity at the level of the superior meatus
Posterior ethmoidal sinus
Name the 2 structures which enter into the nasal cavity at the level of the inferior meatus
What is the cribriform plate?
Part of the ethmoid bone with many perforations which allow fibres of the olfactory nerve to pass through
Which structures pass through the sphenopalatine foramen?
Superior nasal nerve
What is the incisive canal?
Pathway between the nasal cavity and oral cavity
What structures pass through the incisive canal?
Greater palatine nerve
Which branches of the internal and external carotids supply the nose?
What is epistaxis?
Where is epitaxis most likely to occur?
Anterior nasal cavity known as Kiesselbach triangle
Which nerve innervates the special sensory regions of the nose?
Which nerves give sensory innervation to the inner nose?
Ophthalmic nerve --> branches of nasocilliary nerve
Maxillary nerve --> nasopalatine nerve
Which nerves give sensory innervation to the outer nose?
External nasal nerve
Name the 4 paranasal sinuses
How can infection pass from the frontal sinus to the maxillary sinus?
The opening of the frontal sinus is directly above the opening to the maxillary sinus
What is rhinitis?
Inflammation of the nasal mucosa leading to swelling and increased volume of secretion
What is a nasal polyp? What symptoms do they cause?
Side effect of chronic rhinitis. They can cause nasal obstruction leading to snoring and sleep apnoea