Oral and Nasal Cavities Flashcards
What does general and taste sensory innervation to the posterior 1/3 of the tongue?
most of posterior 1/3- CN IX glossopharyngeal (general sensation and taste)
small circle near midline- internal laryngeal n, which is a branch of the vagus n.
What nerve does general sensation of anterior 2/3 tongue?
CN V, V3 lingual nerve.
The frontal sinuses drain through what? Into what?
The frontonasal duct into the semilunar hiatus of the middle nasal meatus.
The anterior cells of the ethmoidal sinus drain through what and to what?
Through the infundibulum to the semilunar hiatus to the middle nasal meatus
The middle (bullar) cells of the ethmoidal sinus drain how?
They open directly to the middle nasal meatus
The posterior cells of the ethmoidal sinus drain through what and to what?
They open directly into the superior nasal meatus.
How do the sphenoidal sinuses drain?
open into the sphenoethmoidal recess and drain into the superior nasal meatus.
How do the maxillary sinuses drain?
drain through several openings to the semilunar hiatus and into the middle nasal meatus.
What does the nasolacrimal duct drain into?
Into the inferior nasal meatus.
If ethmoidal and maxillary sinuses are both infected, it is called what?
pansinusitis.
What does the anterior ethmoidal nerve do and what is it a branch of? What does it turn into?
Branch of nasocilliary nerve of V1. Anterosuperior portion of nasal mucosa. Sends brr to lateral and medial walls, and terminates as external nasal nerve (skin around naris, vestibule, tip of nose)
Where do the nasal branches of V2 enter the nasal cavity? What do they become? where does it then go and what does it do?
Through the sphenopalatine foramen as the nasopalatine n.
Goes down septum, through incisive canal, to the oral cavity. Supplies oral mucosa posterior to incisors, as well as the medial septal wall.
Sympathetics of nasal cavity starting at spinal cord level.
- Starts at spinal cord level T1
- Pre-ganglionic sympathetic fibers enter trunk and ascend to superior cervical ganglion
- Post-ganglionics latch onto internal carotid artery
- They then enter the cranial cavity leaving the internal carotid, forming the deep petrosal nerve
- It joins the greater petrosal nerve of CN VII as they enter the pterygopalatine fossa
Opthalmic artery is branch of what? Which branch (sequentially), and where?
First branch of internal carotid artery distal to the cavernous sinus.
What 5 arteries anastomose on the medial septum? What is the area called?
SEGS
Ant/post ethmoidal, sphenopalatine (maxillary), greater palatine (maxillary), septal branch of superior labial a. (facial). Called Kiesselbach’s area
submucosal venous plexus serves what function?
thermoregulatory function. Warms air prior to entering lungs.
greater palatine nerve innervates what? Branch of what?
Lateral walls of nasal mucosa, gums and hard palate. Branch of V2.
what 3 nerves innervate the dorsum and apex of the nose, and where do they come from?
V1- infratrochlear and external nasal nn
V2- Infraorbital n. to alae.
epistaxis is what? Happens more to what gender?
Nose bleeds. Males more often. Also more common in ages less than 10 and more than 50.
What does the pterygomaxillary fissure contain?
Part 3 of the maxillary artery
Pterygoid canal contains what? What do those nerves generally have/do?
N of pterygoid canal- has parasympathetics from greater petrosal and sympathetics from deep petrosal.
3 entrances to the pterygopalatine fossa?
Foramen rotundum, pterygomaxillary fissure, pterygoid canal.
What does general sensation from pterygopalatine fossa?
V2 of CN V
Exits of pterygopalatine fossa? What is in each of them?
- Inferior orbital fissure- infraorbital nerve and artery, and parasympathetics on comm. branch on way to lacrimal gland.
- Sphenopalatine foramen- sphenopalatine a, nasopalatine n, autonomics to nasal cavity
- Palatine canal- descending palatine a, greater/lesser palatine nerves
Borders of the pterygopalantine fossa?
pterygoid plates, maxillary sinus, nasal cavity, infratemporal fossa
greater palatine (V2) branches into
Posterior inferior lateral brr. ALL LATERAL WALLS, as well as gums/hard palate
