The Vestibular System Flashcards
what are the functions of the vestibular system
a) protection from noise
b) development of balance
c) control posture and body movements
d) integrate peripheral sensory information
e) A and C
f) C and D
g) all of the above
C and D)
Control posture and body movements and to integrate peripheral sensory information
transduces head motion into neural information
peripheral vestibular labyrinth
receives, integrates, and distributes vestibular info to control motor activities
central vestibular system
controls eye movements based on head movements
vestibulo-ocular network
coordinates axial musculature and postural reflexes
vestibulospinal network
allows conscious perception of movement and spatial orientation
vestibulo-thalamo-cortical network
three semicircular duct, each with an enlargement (ampulla) near the _________
utricular communication
sensory epithelium in the ampulla is called the __________
crista ampullaris
the crista ampullaris is covered by a gelatinuous mass called the ________
cupula
the cupula is attached at sides and roof to form a fairly effective seal that does not allow ________ to readily flow past it
endolymph
the ______ canal and base of the utricle are tilted upward in the front at an angle of approx. 30 degrees
lateral (horizontal)
what are the two otolith or macular organs?
utricle (horizontal) and saccule (vertical)
the utricle and saccule are housed in the vestibule of the ____________ labyrinth
bony
_____________ is the sensory epithelium in the two otolith structures
macula
each macula is covered by an otolith membrane that has _____________
otoconia (calcium carbonate crystals embedded)
