Thorax 12 - Nose, Nasal Cavity, to Nasopharynx and Paranasal Air Sinuses Flashcards
What is the function of the nose and nasal cavity?
Warm, humidify and filter inhaled air; sense of smell - olfaction
What is the function of the muscles in and surrounding the nose?
Altering the diameter of the nostrils/naris
What do adjacent paranasal air sinuses open into?
Meati
Where does the ethmoid lie?
Upper part of the nasal cavity - forms the majority of its upper part
Where does the maxilla lie?
Forms the floor of the nasal cavity
What is a key foramen to bear in mind when considering structures that are going t pass into the cavity?
Sphenopalatine foramen
What is the function of the conchae/turbinates?
Makes air turbulent as it passes into the nasal cavity
In which direction must a nasogastric tube be passed into the nasal cavity and why?
Horizontal, since the floor of the cavity (maxilla and palatine bones) lies horizontally
What lies immediately lateral to the nasal cavity?
The orbits (eyes) and ophthalmological things
What lies immediately superior to the nasal cavity?
The brain
Where does the opening to the maxillary sinus lie?
High up in its medial wall
Secretion of mucus requires what type of nervous supply?
Parasympathetic
The trigeminal nerve derives from the 5th V Cranial Nerve and divides 3 times. What are the two key divisions?
Ophthalmic (V1)
Maxillary (V2)
Branches of the Ophthalmic nerve (V1) are accompanied by branches of what vessel?
Ophthalmic branch of the internal carotid artery
The ophthalmic nerve (V1) splits into two branches; what are their names?
Anterior
Superior (medial)
