VESTIBULAR SYSTEM Flashcards
Both the utricleand sacculehave __________which
contain hair cells embeddedin a gelatinousmaterial
covered with__________ or calciumcarbonate
crystals.
- Maculae
2. Otoconia
The ______________ originates in theinner ear.
peripheral vestibular system
_______, ________, or _________ of the head leads to excitation of one system(ear) and inhibition of the other system (ear).
- Acceleration
- deceleration
- rotational movement
Whenever the head undergoes_____________, the ________withinthe SCClags behindthe head movement and initiallymovesin
the ___________.
- Angular acceleration
- endolymph
- opposite direction
The Vestibular System helps the motorsystem control ___________, _________ and _____________.
- posture
2 balance, - equilibrium
Sensory organs within the SCC, utricleand saccule are innervated by the ________ of the __________which projects to thebrainstem.
- vestibular portion
2. VIII cranial nerve
Cristacontains specialized_______imbedded
in a gelatinousmaterial to form the ___________.
- haircells
2. cupula
The_______are responsiveto theeffectsof gravity
and aid in mechanical movement orshearingofthe
sensoryhair cell cilia.
Maculae
The _____________ helps regulate the orientation ofthe body in space
Vestibular System
The semicircular canals can perceive or movements of the head in space.
Angular acceleration
The peripheral inner ear balance
mechanism is comprised of two major
divisions encased within theotic capsule of
thetemporal bone.
- Semicircular canals
2 Utricle & Saccule
The Vestibular System with works withinputfrom the __________ and the ___________ to producesensationof motion.
- Visual system
2. Somatosensory system
Each SCC has an _______ or wideningof the
canal where the___________ is
located.
- Ampula
2. Crista Ampullaris
Sensory hair cells translate ______________ (via shearingaction ofthe cilia) ______________.
- mechanical information
2. into neural impulses
Cilia ofhair cells which insert intothe ____________ undergo ashearing action.
gelatinous cupula
