outer ear Flashcards
What do audiologists do?
evaluate a person’s hearing and balance and improve the impairment
in order to practice audiology one must
pass national exam, achieve or obtain state licensure and graduate from an accredited program.
The function of the eustation tube is
draining middle ear fluids, pressure equalization, pass air into the middle ear.
What are the 4 parts of audiology?
Evaluation, Rehabilitation, Education, Prevention
What does the outer ear consist of?
Pinna/Auricle, External Auditory Canal, Lateral surface of tympanic membrane
What are the functions of the Pinna?
Funnel sound into external auditory canal, Resonator, Localization
This is a tunnel into the temporal bone
External auditory canal
What shape is the external auditory canal?
oval
What is present in the external auditory canal?
Cerumen and Cilia
What are 4 functions of the external auditory canal?
Resonator, filter, TM protector, temperature regulator
Mandibular, hyoid, glossopharyngeal
Pharyngeal arches
Name the 3 pharyngeal arches
Mandibular, hyoid and glossopharyngeal
What are the 3 layers of the pharyngeal arches?
ectoderm, entoderm, mesoderm
What are the 4 things each pharyngeal arch has?
Artery, muscle, cartilage, nerve
What is microtia?
A very small pinna
What is anotia?
no pinna
What is canal atresia?
Absence of the external auditory canal
What is cauliflower ear?
Pressure or trauma to the ear that causes the pinna to lose its landmarks
What is some trauma that can happen to the outer ear?
Sunburn, frost bite, hits
What are keloids?
Bumps after piercings
What is external otitis?
Outer ear infection/ swimmers ear
happens in the elderly during hearing tests. Cartilage loses elasticity
collapsing canals
Very narrow external auditory canals
stenotic canals
What are 2 tumors of the outer ear?
osteomas and extoses
Another name for ear pain
otalgia
