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Ghoraba, N. (2021). NORMATIVE DATA AND TEST-RETEST RELIABILITY OF THE SINUSOIDAL HARMONIC ACCELERATION TEST AND VELOCITY STEP TEST. ALEXMED ePosters, 3(3), 9-10. doi: 10.21608/alexpo.2021.82915.1196
Nourhan Hussein Ghoraba. "NORMATIVE DATA AND TEST-RETEST RELIABILITY OF THE SINUSOIDAL HARMONIC ACCELERATION TEST AND VELOCITY STEP TEST". ALEXMED ePosters, 3, 3, 2021, 9-10. doi: 10.21608/alexpo.2021.82915.1196
Ghoraba, N. (2021). 'NORMATIVE DATA AND TEST-RETEST RELIABILITY OF THE SINUSOIDAL HARMONIC ACCELERATION TEST AND VELOCITY STEP TEST', ALEXMED ePosters, 3(3), pp. 9-10. doi: 10.21608/alexpo.2021.82915.1196
Ghoraba, N. NORMATIVE DATA AND TEST-RETEST RELIABILITY OF THE SINUSOIDAL HARMONIC ACCELERATION TEST AND VELOCITY STEP TEST. ALEXMED ePosters, 2021; 3(3): 9-10. doi: 10.21608/alexpo.2021.82915.1196

NORMATIVE DATA AND TEST-RETEST RELIABILITY OF THE SINUSOIDAL HARMONIC ACCELERATION TEST AND VELOCITY STEP TEST

Article 154, Volume 3, Issue 3, September 2021, Page 9-10  XML
Document Type: Preliminary preprint short reports of original research
DOI: 10.21608/alexpo.2021.82915.1196
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Author
Nourhan Hussein Ghoraba email
Audio-vestibular Medicine Unit, Department of Otorhinolaryngology, Faculty of Medicine, Alexandria University, Alexandria, Egypt.
Abstract
Rotatory chair testing is a component of the vestibular test battery. It has primarily been used for analyzing the vestibulo-ocular reflex (VOR) during angular stimulation of the horizontal semicircular canals.
Standard rotational testing involves Sinusoidal Harmonic Acceleration test (SHAT) and Velocity-step (VST) for evaluation of the horizontal semicircular canal function. SHAT presents stimuli at several sinusoidal frequencies where gain, phase and symmetry of eye movements are analyzed, while VST provides constant velocity stimulation after rapid-onset acceleration followed by rapid deceleration and time constant is recorded.
Rotatory chair has many clinical applications. It is considered the “gold standard” in the evaluation of bilateral vestibular lesions and can be used to assess vestibular central compensation following acute vestibular dysfunction.
The VOR changes as a function of age is a controversial topic and studies of rotatory chair SHAT and VST are limited in literature with variable normal ranges for the test parameters from lab to lab.
Keywords
Sinusoidal Harmonic Acceleration test (SHAT); Velocity-step test(VST); Rotatory chair
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