https://www.physio-pedia.com/Head_Impulse_Test
Normal response: Eyes remain on the target after the examiners movement Abnormal response: Eyes are dragged off the target by the turning of the head, followed by a corrective saccade back to the target after the turning of head. ... The video head impulse test: diagnostic accuracy in peripheral vestibulopathy. Neurology 2009; 73:1134;

https://geekymedics.com/the-head-impulse-nystagmus-test-of-skew-hints-examination/
A normal full neurological exam. HINTS is comprised of three core components: head impulse test, evaluation of nystagmus, and a test of skew. Head-impulse test. To perform the head impulse test: 1. Gently move the patient's head side to side, making sure the neck muscles are relaxed. 2.

http://neurosigns.org/wiki/Head_impulse_test
The normal patient maintains fixation throughout. 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

https://www.sralab.org/rehabilitation-measures/head-impulse-test-head-thrust-test
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 head impulses.

https://www.youtube.com/watch?v=DrA4ERU2aG8
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https://www.ncbi.nlm.nih.gov/books/NBK441861/
Vestibulo-ocular reflex gain is normal in central vestibular lesions. The vestibulo-ocular reflex test or head thrust (also called the head impulse test) forms the basis of a clinical examination to differentiate central vertigo from peripheral vertigo. During this test, the patient is asked to look at the examiner's nose.

https://emergencymedicine.wustl.edu/items/the-hints-exam-to-differentiate-central-from-peripheral-vertigo/
Central Vertigo Video Links. Normal head impulse test. Direction-­‐changing nystagmus. Positive test of skew. A HINTS exam consistent with vertigo of central should have at least one of the follow-­‐ ing: a normal head impulse test (without a corrective saccade), nystagmus that changes direction on eccentric gaze, or a positive test of skew deviation (vertical ocular misalignment).

https://dizziness-and-balance.com/practice/head-impulse.html
One would think that migraine patients would be normal and have normal HIT tests. So far, as of 2014, no study has been made of this. ... Weber, K. P., S. T. Aw, et al. (2008). "Head impulse test in unilateral vestibular loss: vestibulo-ocular reflex and catch-up saccades." Neurology 70(6): 454-63. Zulueta-Santos, C., et al. (2014). "The

https://www.interacoustics.com/academy/balance-testing-training/video-head-impulse-test/video-head-impulse-test-deep-dive
The video head impulse test (vHIT) is a quantitative assessment of the VOR. ... In normal individuals, when the head impulse is performed to one side, the VOR generates compensatory eye movements and keeps the eyes straight ahead. But now, the target has moved ahead of gaze and the subject must make a saccade to get to the target.

https://www.aafp.org/pubs/afp/issues/2017/0201/p154.html
The HINTS (head-impulse, nystagmus, test of skew) examination can help distinguish peripheral from central etiologies. ... Normal head impulse test differentiates acute cerebellar strokes from

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) ... when the head is turned towards the normal side the vestibular ocular reflex remains intact and eyes continue to fixate on

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5465266/
The angular acceleration of a head impulse—up to 4,000°/s 2 —is what occurs during normal head movements. A head impulse is a purely vestibular test because it is too fast for other oculomotor control systems (such as smooth pursuit, optokinetic, cervico-ocular reflex).

https://cks.nice.org.uk/topics/vertigo/diagnosis/assessment/
In a prospective cross-sectional study of 101 people with acute vestibular syndrome (vertigo, nystagmus, nausea/vomiting, intolerance of head movement, and gait unsteadiness) and at least one risk factor for stroke, findings of a normal head impulse test, direction-changing nystagmus in eccentric gaze, or skew deviation performed by a neuro

https://www.neurology.org/doi/10.1212/wnl.0b013e3181bacf85
Abstract. Background: The head impulse test (HIT) is a useful bedside test to identify peripheral vestibular deficits. However, such a deficit of the vestibulo-ocular reflex (VOR) may not be diagnosed because corrective saccades cannot always be detected by simple observation. The scleral search coil technique is the gold standard for HIT

https://www.amboss.com/us/snippet/Head_impulse_test
Head impulse test. A maneuver to examine the vestibuloocular reflex and clinically differentiate between peripheral and central causes of acute vestibular syndrome. Considered abnormal if the patient is unable to maintain central visual fixation, in which case a corrective saccade (quick eye movement) occurs to fixate on the target again. This

https://www.physio-pedia.com/HINTS_Exam
The HINTS exam is a cluster of three bedside clinical tests that aim to assess individuals presenting with acute-onset dizziness, vertigo, nystagmus, head motion intolerance, and nausea/vomiting, also known as acute vestibular syndrome (AVS). HINTS is an acronym for the three tests included: The Head Impulse Test (HI-) Characterization of

https://geriatrictoolkit.missouri.edu/vest/VestStudyGuideChart.pdf
1-2 beats is normal. Central Gaze evoked Nystagmus (abnormal response) Observe direction of nystagmus in each test position. Hold the patient's head stationary. Have the patient follow your finger so she/he is looking 30° to the right, left, up, down. Pause for 20 seconds in each of those positions to observe for nystagmus. Note

https://www.youtube.com/watch?v=QaV2KuG6cnw
Learn how to perform a normal head impulse test with this video tutorial. Watch the eye movements and the vestibular function of the patient.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2890997/
The head impulse test (HIT) is a useful bedside examination to identify a peripheral vestibular deficit for example in patients with vestibular neuritis (VN). 1-4 The clinician briskly rotates the patient's head to detect "overt" catch-up saccades after head rotation as a sign of semicircular canal paresis. "Covert" saccades are saccades that occur during the head rotation that may

https://pubmed.ncbi.nlm.nih.gov/18541870/
Abstract. Objective: To test the diagnostic accuracy of the horizontal head impulse test (h-HIT) of vestibulo-ocular reflex (VOR) function in distinguishing acute peripheral vestibulopathy (APV) from stroke. Most patients with acute vertigo, nausea/vomiting, and unsteady gait have benign APV (vestibular neuritis or labyrinthitis) as a cause.

https://sjrhem.ca/resident-clinical-pearl-hints-exam-in-acute-vestibular-syndrome/
The HINTS exam is a bedside test that carefully assesses eye movements. HINTS stands for Head Impulse-Nystagmus-Test of Skew. Head Impulse: test of vestibulo-ocular reflex function. A normal Head Impulse test (HIT) strongly indicates a central localization for the AVS. An abnormal HIT usually indicates a peripheral lesion.

https://www.neurology.org/doi/10.1212/01.wnl.0000314685.01433.0d
Conclusions: Patients with lateral pontine and cerebellar strokes can have a positive horizontal head impulse test (h-HIT), so the sign's presence cannot be solely relied upon to identify a benign pathology. Additional clinical features (e.g., directionality of nystagmus, severity of truncal instability, nature of hearing loss) must be considered in patients with acute vestibular syndrome

https://gpnotebook.com/pages/neurology/hints-head-impulse--nystagmus--test-of-skew-in-assessment-of-sudden-onset-acute-vestibular-syndrome-vertigo--nausea-or-vomiting-and-gait-unsteadiness
HINTS stands for Head Impulse, Nystagmus, and Test of Skew, and is a three-part oculomotor test. If any portion of the test indicates a central aetiology, the test is considered positive and further evaluation for stroke (or other central pathology) is warranted. The three components of the exam are as follows: 1 Head Impulse

https://www.youtube.com/watch?v=XpghlvnrREI
Learn when to perform and how to interpret the head impulse test, the most valuable part of the HINTS exam.