2.4 Flashcards
What does the stapes do to produce fluid
Pushes oval window which produces fluid waves in endolymph of cochlea
What does the waves causes that the stapes produces
Push on the scala media and produce movement of a portion depending on frequency
What absorbs the vibration of the endolymph
Absorbed by the round window
What is the basilar membrane constructed as
As a tanotopic organ
True or false
Basilar membrane consist of hair cells
True
What does the temporal field respresent
Info coming from the medial side but showing through the lateral portion of the eye
What does the nasal field represent
Info coming from the lateral side but showing on the medial side of the eye
Which layer receives info coming from the thalamus
Layer 4
Which layer sends info out to the spinal cord
Layer 5
How is orientation set up for the visual cortex
By going across
Visual cortex has ocular dominance which allows what?
It means stuff coming back from the visual cortex is coming from the same field in different eyes
What is an example of ocular dominance
Info goes to the right nasal and left temporal field, and starts at the left visual cortex
What does binocular vision allow for
Depth perception
What are the two streams of the visual stream
Dorsal and ventral stream
What’s the characteristic of the dorsal stream and which lone does it go to
(Spatial vision) pathway goes to the parietal lobe
What’s the characteristic of the ventral field and which line does it go to
(Object recognition) pathway goes to the temporal lobe
What does changes in pressure cause
Sound
What is frequency related to
Pitch of noise
What is amplitude related to
Loudness of noise
What is location related to
Spatial origin of the nose
What does collection and amplification system cause
Ossicles amplify force air vibration and push on the oval window
What does the middle of the ear contain
Tympanic membrane
True or false
Tympanic membrane vibrates with sound
True
Is the basilar membrane thicker or thinner as you go towards the apex
Thicker
Which basilar membrane cause a high pitch and low pitch
Thinner basilar membrane causes a high pitch
Thicker basilar membrane causes a lower pitch
What does movement of the basilar membrane cause
Shearing force that bends the stereocilia of the hair cells
What are the characteristic of the outer hair cells
They are efferent systems that act to filter specific frequencies which allow selective attention
What’s the characteristic of inner hair cells
They are actual sensory receptors which project auditory nerves to the brain
What happens when the stereocilia pushes against the kinocilium
It depolarizers and K+ ions go into the stereocilia
What happens as the kinocilium pushes against the stereocilia
It hyperpolarizes and the channel remains closed
What are two important pathways of ascending auditory pathways
Spinal ganglia and superior olivary nucleus
What’s the function of the superior olivary nucleus
Coincidence detectors
What’s the purpose of a narrow base of the basilar membrane
Tuned for high frequencies
What is the function a wilder apex of the of the basilar membrane
Low frequencies
True or false
The auditory system is not bilateral
False
What are the three bones in the ear
Malleus, stapes, incus
