https://www.physio-pedia.com/Head_Impulse_Test
This test works by testing the Vestibulo Ocular Reflex (VOR). This reflex is helpful to maintain corrective eye position during any change in head position and to correct the eye movement rapidly so that vision remains on the target [2] . Advantages of the test. - Relatively quick. - Can be used even on patients with acute Vertigo.

https://www.sralab.org/rehabilitation-measures/head-impulse-test-head-thrust-test
Purpose. The Head Impulse Test (HIT) is a widely used clinical assessment technique used to assess the angular vestibulo-ocular reflex (aVOR). Specifically, the HIT assesses horizontal semicircular canal (HSCC) and superior vestibular nerve function in response to discrete, small amplitude (~10 ), high acceleration (~3000-4000 s2) rotational

https://www.youtube.com/watch?v=BmNCEhN61gM
Clinical Balance Function Testing

http://neurosigns.org/wiki/Head_impulse_test
The patient with a defective left labyrinth loses fixation with the rapid head movement and must make a catch-up saccade to the right. The head impulse test (HIT), or head thrust test, is used to help identify an impaired vestibulo-ocular reflex (VOR) in patients with vertigo, particularly in suspected acute peripheral vestibulopathy. (1-4) The

https://www.neurology.org/doi/10.1212/wnl.55.10.1431
Head thrust sign: Look for a catch-up saccade with quick head turns toward the side of unilateral vestibular loss ... By convention, measurement of the VOR in rotational testing is expressed in terms of the gain (slow-component eye velocity : head velocity) and the phase shift, which is an offset in the timing of eye movement relative to head

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4066458/
Here we review the major bedside tests of the vestibulo-ocular reflex and how, when combined with a proper examination of the other eye movement systems, one can arrive at an accurate vestibular diagnosis. Keywords: Vestibular, Examination, Labyrinth, Vestibulo-ocular, Nystagmus. Go to: 1. Introduction. The evaluation of patients with dizziness

https://www.interacoustics.com/academy/balance-testing-training/video-head-impulse-test/video-head-impulse-test-deep-dive
There are two clinical methods of performing head impulse testing: the bedside head impulse test (HIT), also known as the head thrust test (HTT), and the video head impulse test (vHIT). Both tests measure the function of the vestibulo-ocular reflex (VOR), which is the connection between the vestibular system and the oculomotor muscles.

https://www.advancedotology.org/content/files/sayilar/56/buyuk/Kaplan1.pdf
Correspondence. Daniel M Kaplan Department of Otolaryngology Head and Neck Surgery Soroka University Medical Center Beer Sheva, Israel. Phone: +972 54 749 9234 Fax: +972 8 646 6602 E-mail: dankap@bgumail.bgu.ac.il. Submitted: 29 May, 2005 Revised: 20 July, 2005 Accepted: 22 July, 2005.

https://gpnotebook.com/pages/ear-nose-and-throat/head-impulse-test-head-thrust-test
Head Impulse Test. also known as "head thrust test", is a sensitive and specific investigation method which detects unilateral hypofunction of the peripheral vestibular system caused mainly by acute vestibulopathy (1,2) normally, a functional vestibular system will identify any movement of the head position and rapidly correct eye movement

https://dizziness-and-balance.com/practice/head-impulse.html
It describes the result of having an examiner abruptly accelerate and then decelerate the head, moving the head in rapidly at high speed and then stopping it. The term "HIT" is generally used for a sudden rotational movement about the up-down (vertical) axis of the head. A similar "impulse" can also be delivered about a linear axis -- this is

https://www.physio-pedia.com/Objective_Vestibular_Assessment
The head thrust test; The dynamic visual acuity (DVA) test; The head shaking test can also be conducted, but it works better with an infrared camera system. Head Thrust Test [edit | edit source] The head thrust test (HTT) is generally accepted as a useful clinical test for assessing the angular vestibulo-ocular reflex.

https://www.nanosweb.org/files/6_N-Tneurovestibexam.pdf
The horizontal head impulse test (h-HIT) of vestibulo-ocular reflex (VOR) function, as originally described, is a rapid, passive head rotation from a center to lateral (10-20 degrees) position as a subject fixates at a central target (e.g., the examiner's nose). Since the response is linked to high acceleration rather than high velocity or

https://www.medicinenet.com/vor_reflex/article.htm
VOR can be tested using the following three methods: 1. Head impulse testing (HIT): Head impulse can be safely and quickly completed at the bedside with the patient. It is used primarily for identifying VOR deficits. To complete the test, the patient is asked to fixate on a target while the examiner rotates the head.

https://brainstuff.org/blog/halmagyi-curthoys-rapid-head-impulse-test
This automatic reflex allows the eyes to stay focused on an object even though the head is moving. The Halmagyi-Curthoys test is a clinical neurological examination that is used to assess whether or not the vestibulo-ocular reflex is intact in a patient. It is sometimes also called the Halmagyi head thrust maneuver, or the rapid head impulse test.

https://en.wikipedia.org/wiki/Vestibulo%E2%80%93ocular_reflex
The vestibulo-ocular reflex (VOR) is a reflex that acts to stabilize gaze during head movement, with eye movement due to activation of the vestibular system, it is also known as the Cervico-ocular reflex. The reflex acts to stabilize images on the retinas of the eye during head movement. Gaze is held steadily on a location by producing eye

https://geriatrictoolkit.missouri.edu/vest/VestStudyGuideChart.pdf
VOR Gain 1. Maintained Fixation Maintains fixed gaze with head movement (eyes move opposite to head). "Keep your eyes on my finger." "Move your head quickly side to side; repeat up & down" Done at a rate of > 60° / sec. (faster than smooth pursuit) e.g. VOR x 1 Dizziness, nausea, headache. Not able to maintain focus on target. Vestibular

https://ptproductsonline.com/resource-center/vestibular-rehabilitation-examination-treatment-to-foster-recovery/
Eye and Vestibulo-Ocular Reflex Examination. Occulomotor movements are examined to assess for smooth pursuit, saccadic eyes movement, convergence, and divergence. Any reproduction of symptoms may indicate central nervous system pathology. The therapist tests the VOR for slow VOR, VOR cancellation, and VOR head thrust.

https://vertigodifferentiation.weebly.com/head-thrust.html
Head Thrust. Head thrust test is also referred to as the 'Head Impulse Test.'. This test examines the vestibulo-ocular reflex (VOR). Sensitivity and specificity for diagnosing unilateral vestibular hypofunction (UVH) in patients following vestibular ablation is 100%. Sensitivity for patient is non-surgically induced UVH is 35-39%.

https://www.neurology.org/doi/pdf/10.1212/wnl.55.10.1431
The vestibulo-ocular reflex (VOR) is a reflex that acts at short latency to generate eye movements that compensate for head rotations in order to preserve clear vision during locomotion. The VOR is the most accessible gauge of vestibular function. Evaluating the VOR requires application of a vestibular stimulus and measurement of the resulting eye

https://www.apta.org/patient-care/evidence-based-practice-resources/test-measures/head-thrust-test-htthead-impulse-test-hit-for-vestibular-hypofunction
The head thrust test is used to identify individuals with hypofunction of the vestibulo-ocular reflex unilaterally and bilaterally. Target Population: The test can be used to assess the angular vestibulo-ocular reflex in patients with concussions, traumatic brain injuries, and vestibular disorders. Specific populations studied include:

https://jamanetwork.com/journals/jamaotolaryngology/fullarticle/483036
The vestibulo-ocular reflex (VOR) gains for passive and active head thrust test (HTT) of 3 subjects without unilateral vestibular deficiency (UVD) (A) and 10 subjects with UVD (B and C). The keys in Figure 4 provide characteristics of each subject. In A, lowercase letters indicate leftward thrusts; uppercase letters, rightward thrusts.

https://collections.lib.utah.edu/details?id=187678
𝗢𝗿𝗶𝗴𝗶𝗻𝗮𝗹 𝗗𝗲𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻: Slow vestibulo-ocular reflex (VOR): Since smooth pursuit and VOR systems are both active, if eye movements are choppy with this maneuver this implies deficits in both pursuit and the vestibular system as in CANVAS; Fast (HIT): Since smooth pursuit fails at high frequencies and high speeds, the VOR is isolated during

https://quizlet.com/gb/487907506/clinical-tests-of-vestibular-function-1-eye-movement-assessments-vor-flash-cards/
Clinical Tests of Vestibular Function 1 (Eye Movement Assessments & VOR) Flashcards. Learn. Test. Match. Flashcards. Learn. Test. Match. Created by. Stephanie_Nel7. Terms in this set (32) What are the objectives of bedside tests? What questions would we ask and what would we look for?