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Related Experiment Video

Updated: Jul 19, 2025

Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
08:38

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Published on: April 18, 2019

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[THE VIDEO HEAD IMPULSE TEST (VHIT)].

Nabil Faranesh1,2, Avi Shupak3,4

  • 1Unit of Otoneurology, Lin Medical Center, Haifa, Department of ENT Head.

Harefuah
|August 10, 2023
PubMed
Summary
This summary is machine-generated.

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The video head impulse test (vHIT) assesses the vestibulo-ocular reflex using head movement and eye-tracking data. This advanced tool measures reflex gain and identifies corrective saccades for vestibular function evaluation.

Area of Science:

  • Vestibular system diagnostics
  • Oculomotor function assessment
  • Neuro-otology

Context:

  • The video head impulse test (vHIT) is an advancement of the traditional Head Impulse Test.
  • It evaluates the integrity of the vestibulo-ocular reflex (VOR) through high-frequency head movements.
  • The system integrates accelerometers for head motion and infrared cameras for precise eye tracking.

Purpose:

  • To introduce and describe the methodology of the video head impulse test (vHIT).
  • To outline the key parameters measured by vHIT: VOR gain and corrective saccades.
  • To highlight vHIT's role in assessing semi-circular canal function.

Summary:

  • vHIT utilizes goggles with accelerometers and eye-tracking cameras to measure head and eye velocity during rapid head impulses.

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  • Key metrics include vestibulo-ocular reflex (VOR) gain (head-to-eye velocity ratio) and saccade detection (covered and overt).
  • This technique provides objective data on the function of the horizontal semi-circular canals.

    • Impact:

    • vHIT offers a more detailed and objective assessment of vestibular function compared to the clinical HIT.
    • It aids in diagnosing peripheral and central vestibular disorders.
    • The technology enhances the understanding and evaluation of the vestibulo-ocular reflex in clinical settings.