Sensory system - Vestibular system
13 important questions on Sensory system - Vestibular system
What is the function of the vestibular system?
o Compensatory eye movements
o Compensatory neck movements
o Compensatory trunk movements
o Positional awareness
- Equilibrium
Where does the vestibular system consists of?
The 3 ducts are oriented with an angel with respect to each other
The vestibular system contains hair cells. Tell something about them
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The hair cells of the vestibular system can move in 2 directions, what if the movement causes depolarization?
Which 2 apparatuses exist within the vestibular system?
Semicircular canals
What is characteristic for the utriculus and saccalus?
Depending on the force of gravity, the matrix will pull on the hair cells, which causes a change of conformation and thus in a change of membrane potential. The hair cells are oriented in different positions.
What is the direction of the hair cells in the utriculus and sacculus?
Sacculus = vertical plane
--> perpendicular to each other
What is characteristic for the semicircular canals?
To maintain equilibrium at least two of three systems must be available, which systems?
§ Proprioceptive system
§ Visual system
To which systems does the vestibular system project?
- vestibulorecebellar projection (cerebellum)
- medial longitudinal fasciculus (used by many systems)
What is the vestibulo-ocular reflex (VOR)?
How many muscles control the eye?
What is the optokinetic reflex?
The optokinetic reflex and vestibulo-ocular reflex work together to maintain a gaze.
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