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Disorders of Equilibrium MCQs
Neurology · MBBS / Medicine · 27 practice questions
- Localization of Ataxia Type
- Stance Testing in Ataxia Types
- Anatomic Basis of Cerebellar Signs
- Peripheral vs Central Vertigo
- Cerebellar vs Vestibular vs Sensory Ataxia
- Vertigo vs Nonvertiginous Dizziness
- Vertigo Localization
- Sensory Ataxia - Anatomy and Pathways
1. A neurologist examines a patient with cerebellar disease and notes that after briskly displacing the patient's outstretched arm and releasing it, the arm swings excessively before returning to position, and the antagonist muscle fails to check the motion. What is this clinical sign called?
- ATerminal dysmetria
- BTitubation
- CRebound phenomenon
- DAsynergia
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C. Rebound phenomenon When the antagonist muscle fails to check movement promptly after resistance is removed, this results in rebound movement of the limb.
2. Which of the following is required for normal equilibrium according to the physiologic basis described in the chapter?
- AIntegration of motor cortex output with spinal reflex arcs only
- BIntegration of visual, labyrinthine, and proprioceptive input in the brainstem and cerebellum
- CIntegration of auditory and visual input alone in the parietal cortex
- DIsolated function of the vestibular nerve without cortical input
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B. Integration of visual, labyrinthine, and proprioceptive input in the brainstem and cerebellum Equilibrium depends on continuous visual, labyrinthine, and proprioceptive somatosensory input and its integration in the brainstem and cerebellum.
3. A 58-year-old man reports episodes of feeling faint and light-headed while standing up quickly, without any sensation that his surroundings are moving. He has a history of orthostatic hypotension. Which feature most reliably distinguishes his complaint from true vertigo?
- APresence of associated nausea
- BAbsence of an illusion of movement of self or environment
- COccurrence of the episode while standing
- DPresence of gait instability during the episode
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B. Absence of an illusion of movement of self or environment Nonvertiginous dizziness lacks the illusion of movement that defines vertigo; it results from conditions depriving the brain of blood, oxygen, or glucose.
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