The Ear Flashcards
What is static equilibrium?
Standing still, you know Which way is up, I respect to gravity.
What is dynamic equilibrium?
Maintaining balance during spinning.
What is the external ear?
Elastic cartilage covered with skin, a cone funneling sound waves into the external acoustic meatus. Only for sound.
What is located in the external acoustic meatus?
Is lined with hairs, and at the base of the hairs are ceruminus glands which produce cerumen, which
Protects the tympanic membrane.
Where is the tympanic membrane located?
Not in in the external or middle ear. Merely the division/barrier between both.
Transfers sound waves from the external ad to the middle ear
Three parts of the auditory ossicles are:
Meatus, incus and stapes
What causes the auditory ossicles to vibrate ?
The vibration of the tympanic membrane
How are he auditory vesicles connected?
Fluid filled joints, so they can rock on each other, synovial joints.
What is the divine between the middle and the inner ear?
The oval window and round window
What is the inner air?
An air filled space which should have the same atmospheric pressure as the middle ear.
What is the eustachian or auditory tube connected to?
From the middle ear right into he pharynx.
Function for the chochlea
For hearing
Function of vestibule
Static equilibrium
Function of semicircular canals
Dynamic equilibrium
What happens during the vibration of the oval window?
The fluid in the Scalia vestibule vibrates, causing the vestibular membrane to vibrate, causing the fluid in the chochlear duct to vibrate, the the basilar membrane to bounce up and down
What is located on the top of hair cells?
Stereocilia, and when blended cause action potentials
What is not affected by vibrations in the choclea?
Tectorial membrane
As the flexibility of the choclea gets more flexible as it goes inward, which part is the most flexible?
The helicotrema
Two parts of the vestibule:
Utricle
Saccule.
Each have a macula.
What is located over the hair cells in the utricular and saccular matrix?
The gelatinous matrix, which, when moved, bend the stereocilia on the hair cells which activate an action potential
What is at the end of each semicircular canal?
Ampullae, in which, when the flame-like cupola bends or moves, will assist with dynamic equilibrium.
What are chochlear implants?
Inserted down the length of the choclea, receivers that send the information from the frequencies in the chochlea to antenna connected to nerves in the head.
