1
What is the main purpose of the vestibular system?
Provides input for body orientation & movement
What part of the brainstem plays a key role in coordinating postural reflexes?
Medulla oblongata
How many nuclei are in the vestibular nuclear complex?
4
Which of the sensory organ provides the primary input for postural control?
ears
What is the name for the pathway in the brain responsible for maintaining balance and postural control?
Vestibular pathway
True or False: Output from the vestibular nuclei plays a role in controlling eye movements.
True
Frequency of pain?
140dB
True or False: Output from the vestibular nuclei is only involved in maintaining balance and posture.
False
What is amplitude measured in?
decibels [dB]
If there is damage to the vestibulo-cerebellar reflex tract that controls eye movements, what will occur?
Nystagmus
Why does the membrane of the round window bulge outward and inward?
To allow propagation of the pressure (travelling) wages in the inner ear
True or False: Output from the vestibular nuclei is not involved in coordinating movements of the limbs.
False
What does the vestibular system detect?
Static Equilibrium, Upright Posture, Linear Acceleration
Which of the following structures is not involved in the vestibulo-ocular reflex pathways?
a) The vestibular nuclei
b) The oculomotor nuclei
c) The cerebellum
d) The hippocampus
d) The hippocampus is not involved in the vestibulo-ocular reflex pathways.
Which of the tests involves irrigating each ear with warm or cool water to stimulate the inner ear?
Caloric testing
Which of the following is true regarding the vestibulo-ocular reflex (VOR) pathways?
a) The VOR pathways are responsible for controlling eye movements in response to head movements
b) The VOR pathways are responsible for controlling head movements in response to visual stimuli
c) The VOR pathways are only active during voluntary eye movements
d) The VOR pathways are only active during sleep
a) The VOR pathways are responsible for controlling eye movements in response to head movements.
____ is sensitive to head tilt from sideways position. ______ is sensitive to head tilt from the upright position.
Saccule; utricle
Which of the following vestibular disorders is characterized by the sudden onset of vertigo and may be accompanied by hearing loss and ringing in the ear?
a) Benign paroxysmal positional vertigo (BPPV)
b) Vestibular neuritis
c) Meniere's disease
d) Superior canal dehiscence syndrome
b) Vestibular neuritis
Which of the following is not a common symptom of vestibular disorders?
a) Dizziness
b) Vertigo
c) Blurred vision
d) Numbness and tingling in the extremities
d) Numbness and tingling in the extremities
For what the organ of Corti is responsible?
The organ of Corti is a structure located within the cochlea of the inner ear. It is responsible for converting sound waves into neural signals that can be transmitted to the brain for processing.