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44 terms

Ear & Nose Anatomy

(doesn't include eye anatomy)
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Cochlea
Contains spiral ganglion
Helix
Outer rim of auricle
antihelix
ridge along the middle of auricle
tragus
little bump over the anterior side of external acoustic meatus
just superior to lobule
antitragus
Stapes attachment to inner ear
oval window
parts of labyrinth (inner ear)
Cochlea
vestibule
semicircular canals
normally closed, equalizes pressure during swallowing.
links middle ear to pharynx.
Auditory tube (aka Eustachian tube or
pharyngotympanic tube)
Utricle and Saccule
Parts of the membranous labyrinth, within the vestibule
Membranous Labyrinth
membrane-walled ducts and sacs lining the bony labyrinth.
Three main parts: 1) cochlear duct, 2) utricle & saccule, 3) semicircular canals
Bony Labyrinth
3 part cavity:semicircular canals, vestibule, cochlea
contained in membranous labyrinth
endolymph fluid
contained in bony labyrinth
perilymph fluid
Functions of the nose
-airway passage
-moisten & warm air
-filter air
-resonating chamber for speech
-houses olfactory receptors
Conchae & meatus
increase surface area exposed to air
nasolacrimal duct drainage
inferior meatus (below inferior conchae)
frontal sinus and maxillary sinus drainage location
through infundibulum into semilunar hiatus (middle meatus @ hiatus semilunaris)
sphenoid sinus drainage
Above the superior nasal concha
Called: sphenoethmoidal recess.
-Tilt head forward to drain
hiatus semilunaris
area in middle meatus where frontal and maxillary sinuses drain, as well as the anterior ethmoid air cells
Middle ethmoid air cell drainage
Middle meatus
Posterior ethmoid air cell drainage
superior meatus
adenoids
pharyngeal tonsils
in posterior wall of NASOpharynx
destroys pathogens
tubal tonsils
some protection from infection
located near the pharyngotympanic tube in the NASOpharynx
Epithelium of BOTH oropharynx and laryngopharynx
stratified squamous epithelium
Fauces
arch-like entranceway inside the mouth.
Extends from soft palate to epiglottis
Two tonsils of OROpharynx
palantine - lateral walls under fauces
lingual - on posterior tongue surface
Olfactory neurons
Bipolar neuron:
axons to nasal mucosa
soma (cell body) found in olfactory bulb
olfactory track -> medial temporal lobe
result of trauma, which tears fibers in cribiform plate
anosmia (no smell) associated with TBI
Olfactory
The one sense that doesn't pass through the thalmus before going to the cortex
Vestibule of the oral cavity
Space between the teeth and cheek
(gets big when you blow your cheeks out)
labial frenulum
string-like skin from the gums (gingiva) between front two teeth to the cheek
(under the tongue = lingual frenulum)
Palatopharyngeal arch
posterior to palantine tonsil
palatoglossal arch
more anterior in mouth
*Marks the boundary between mouth/pharynx
Stenson's duct
Parotid duct from parotid gland
-opens high up in the vestibule (around the second molar)
Wharton's duct
from submandibular gland
-opens under the tongue to either side of the lingual frenulum
Sublingual duct
opens along sublingual fold
Permanent teeth
8 per quadrant:
2 insisors, 1 canine, 2 premolar, 3 molar
Sensory component of Gag Reflex
CN 9
Motor component of Gag Reflex
CN 10 (Vagus)
Retropharyngeal space
area created by DEEP layers of fascia, posterior to the esophagus between the prevertebral & buccopharyngeal fascia
Fxn of retropharyngeal space
Allows the esophagus to move in relation to the vertebral column during swallowing.
Clinical significance: allows the spread of infections to the mediastinum
Occipital & retroauricular lymph nodes
both flow to the superficial cervical nodes, located along the EJV (Superficial to the SCM).

From superficial cervical nodes -> deep
submental, submandibular, buccal & parotid lymph nodes
Flow strait to deep cervical nodes
The chain of nodes along the internal jugular vein
Deep cervical nodes.
Drain into the jugular trunk -> thoracic duct or right lymphatic duct