Lecture (3/26) Week 10 Tuesday Flashcards
semi circular canals are an organ of…
balance
are their sensory cells in the tubes of the semicircular canals?
no
what is it called where the canals attach to the vestibule
ampulla
each ampulla contain…
crista ampullaris
do crista ampullaris contain ciliated sensory cells?
yes
are the cilia linked?
no
what are the cilia of the crista ampullaris embedded in?
cupola
semi circular canals and ampulla are responsible for…
rotation and angular acceleration
as the head rotates, the endolymph in the tube moves in the _____ direction
opposite
the stereocilia bending open channels at their root creating a chemical change within the cell and causing a ______
release of neurotransmitter at the base
ampulla are the ___ ____ of ____
end organ of balance
Where is the utriclosaccular potion located
Located in vestibule
Contains 2 diff membranes
Utricle
Into which the ampulla open
Saccule lies in
Medial wall
Utroclosaccular portion is responsible for
Encoding linear acceleration
Otoliths function
Organs detect static head position and linear acceleration
Saccule
Vertical acceleration up-and-down, located on back wall facing forward
Utricle
Horizontal acceleration, back-and-forth base of ampulla facing up
Encoding balance information
Hair cell changes, the mechanical energy of the Celia to electrochemical energy of a graded potential
What nerve carries balance information?
8th nerve
Striola
Change an orientation of the stereocilia
Where do neural projections go?
Vestibular nuclei in medulla
Where do neural projection sit?
fourth ventricle
The major attracts from the medial lateral and inferior nuclei go where
The cerebellum
Info from the superior vestibular nucleus is sent where
Medial longitudinal fasciculus
What is the medial longitudinal fasciculus?
a fiber track that runs midline through the medulla ponds and midbrain
The superior vestibular nuclei allows for…
Coordination of eye, movement and head neck movement
