Week 13 Flashcards by Fares Soliman

Q

What is the vestibular system divided into?

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Q

What is the purpose of the vestibular system?

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Q

What would this type of information be used for?

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postural control

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Q

Approximately how big is the vestibular system?

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Q

What is the tipping angle of the labyrinth?

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Q

What is the orientation angle of the superior and posterior canals?

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Q

Label and explain the layers

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Q

what are the hair cells? How do they move?

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Q

What are the canal pairs?

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Q

In a canal pair, what does excitation of one lead to?

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Q

Label which canal is responsible for each?

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Q

Explain the effects at rest vs in right acceleration

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Q

What is the resting discharge rate of both vestibular nerves? If head turns right, what happens to the discharge rate of the right and left vestibular nerves?

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Q

What are otoliths?

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Q

What happens to otoliths when the head is bent forward?

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Q

Label and explain what direction it would go to depending on the motion

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Q

What is the innervation of the vestibular system?

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What is the responsibility of the vestibular nuclei complex?

What are the components of the vestibular nuclei complex?

What is the role of LVST?

Explain LVST pathway

What is the role of MVST?

Explain MVST pathway

What is the function of the ascending portion of MLF?

Other than LVST and MVST, what are some other vital pathways?

vestibulo-thalamo-cortical Vestibulo-autonomic Vestibulo-cerebellar

Explain the vestibulo-thalamo-cortical pathway

Explain vestibulo-autonomic pathway

Explain the vestibulo-cerebellar pathway

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Explain the vestibulo-ocular reflex

Head turn to the left: label and explain active eye muscle, cranial nerves, and the effect on VOR

What is the canal stimulated, 1st and 2nd synapses, and muscles activated for Horizontal VOR?

If the head turns to the right and the eyes to the left, which eye muscle is inhibited?

Explain vertical VOR

What is the canal stimulated, 1st and 2nd synapses, and muscles activated for Vertical VOR (head up, down)?

What can cancel VOR?

What is the normal value for VOR?

Explain the vestibulo-spinal reflex

Explain central processing of vestibular input

What happens when the vestibular system is affected?

Where can deficits in the vestibular system arise?

What kind of deficits can arise due to vestibular issues?

Explain dizziness

What can PT check to understand if the symptoms display vertigo?

Explain dysequilibrium

Explain nystagmus and its types

What are the characteristics of peripheral nystagmus?

Label and highlight the issue

List and explain peripheral vestibular disorders

Explain central nystagmus

List and explain central vestibular disorders

What can cause central vestibular disorders?

Compare nystagmus, oculomotor, and other signs for central vs peripheral vestibular issues

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