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Vestibular System Anatomy & Physiology Techniques Flashcards

7 cards from real CVT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which structure in the inner ear contains the macula utriculi and macula sacculi?

    Answer: Otolithic organs

    The otolithic organs (utricle and saccule) each contain a macula, which is a sensory epithelium embedded with otoconia crystals that detect linear acceleration.

  2. The type I hair cell in the vestibular system is characterized by its:

    Answer: Flask shape enclosed by a calyceal afferent nerve ending

    Type I hair cells are flask-shaped and are enclosed by a calyceal (chalice-shaped) nerve ending that surrounds the base of the cell.

  3. Which cranial nerve carries vestibular afferent signals from the inner ear to the brainstem?

    Answer: CN VIII (Vestibulocochlear nerve)

    The vestibulocochlear nerve (CN VIII) transmits both vestibular and auditory afferent signals from the inner ear to the brainstem.

  4. The endolymph fluid within the membranous labyrinth has an ionic composition most similar to:

    Answer: Intracellular fluid

    Endolymph is uniquely high in potassium and low in sodium, resembling intracellular fluid rather than typical extracellular fluids like perilymph or CSF.

  5. During head rotation to the right, the right horizontal semicircular canal ampulla experiences:

    Answer: Ampullopetal endolymph flow causing excitation

    Rightward head rotation causes ampullopetal (toward the ampulla) endolymph flow in the right horizontal canal, which deflects the cupula and excites right-side hair cells.

  6. The vestibulo-ocular reflex (VOR) stabilizes gaze by generating eye movements that are:

    Answer: Opposite in direction and roughly equal in magnitude to head movement

    The VOR produces compensatory eye movements opposite to head movement at roughly the same velocity, keeping the visual image stable on the retina.

  7. Scarpa's ganglion contains the cell bodies of which neurons?

    Answer: Primary vestibular afferent neurons

    Scarpa's ganglion (vestibular ganglion) houses the bipolar cell bodies of primary afferent neurons that relay signals from the vestibular hair cells to the brainstem.