Abstract
BACKGROUND: Vestibular rehabilitation is a sub-specialization within the practice of physical therapy that includes treatments designed to reduce gaze instability. Gaze stability exercises are commonly given for head rotations to the left and right, even in subjects with one healthy vestibular system (as in unilateral loss). Few studies have investigated the difference in the angular vestibular ocular reflex gain (aVOR) measured in the acute phase after deafferentation for ipsilesional head rotations that move the head away from center or towards center. OBJECTIVE: The purpose of this study was to compare differences in acute aVOR gain when the head was passively rotated outward from an initially centered position (neck neutral) versus the head being rotated inward. METHODS: We recorded head and eye velocity using video head impulse test equipment in patients with unilateral vestibular pathology scheduled for tumor resection via retrosigmoid approach (n=5) or labyrinthectomy due to Meniere's disease (n=2). RESULTS: We found 1) no difference in the ipsilesional aVOR gain for inward or outward directed head impulse rotations and 2) head velocity is inversely correlated with aVOR gain for ipsilesional but not contralesional rotations. CONCLUSIONS: Bedside testing of the ipsilesional aVOR following acute vestibular ablation can be done with head impulse rotations to either side. In the acute stages, physical therapists should prescribe ipsilesional and contralesional gaze stability exercises.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 397-402 |
| Number of pages | 6 |
| Journal | Journal of Vestibular Research: Equilibrium and Orientation |
| Volume | 24 |
| Issue number | 5-6 |
| DOIs | |
| State | Published - 2014 |
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Keywords
- Head impulse test
- vestibular rehabilitation
- VOR gain
ASJC Scopus subject areas
- Otorhinolaryngology
- Clinical Neurology
- Sensory Systems
- Neuroscience(all)
- Medicine(all)
Cite this
Acute VOR gain differences for outward vs. inward head impulses. / Schubert, Michael C; Mantokoudis, Georgios; Xie, Li; Agrawal, Yuri.
In: Journal of Vestibular Research: Equilibrium and Orientation, Vol. 24, No. 5-6, 2014, p. 397-402.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Acute VOR gain differences for outward vs. inward head impulses
AU - Schubert, Michael C
AU - Mantokoudis, Georgios
AU - Xie, Li
AU - Agrawal, Yuri
PY - 2014
Y1 - 2014
N2 - BACKGROUND: Vestibular rehabilitation is a sub-specialization within the practice of physical therapy that includes treatments designed to reduce gaze instability. Gaze stability exercises are commonly given for head rotations to the left and right, even in subjects with one healthy vestibular system (as in unilateral loss). Few studies have investigated the difference in the angular vestibular ocular reflex gain (aVOR) measured in the acute phase after deafferentation for ipsilesional head rotations that move the head away from center or towards center. OBJECTIVE: The purpose of this study was to compare differences in acute aVOR gain when the head was passively rotated outward from an initially centered position (neck neutral) versus the head being rotated inward. METHODS: We recorded head and eye velocity using video head impulse test equipment in patients with unilateral vestibular pathology scheduled for tumor resection via retrosigmoid approach (n=5) or labyrinthectomy due to Meniere's disease (n=2). RESULTS: We found 1) no difference in the ipsilesional aVOR gain for inward or outward directed head impulse rotations and 2) head velocity is inversely correlated with aVOR gain for ipsilesional but not contralesional rotations. CONCLUSIONS: Bedside testing of the ipsilesional aVOR following acute vestibular ablation can be done with head impulse rotations to either side. In the acute stages, physical therapists should prescribe ipsilesional and contralesional gaze stability exercises.
AB - BACKGROUND: Vestibular rehabilitation is a sub-specialization within the practice of physical therapy that includes treatments designed to reduce gaze instability. Gaze stability exercises are commonly given for head rotations to the left and right, even in subjects with one healthy vestibular system (as in unilateral loss). Few studies have investigated the difference in the angular vestibular ocular reflex gain (aVOR) measured in the acute phase after deafferentation for ipsilesional head rotations that move the head away from center or towards center. OBJECTIVE: The purpose of this study was to compare differences in acute aVOR gain when the head was passively rotated outward from an initially centered position (neck neutral) versus the head being rotated inward. METHODS: We recorded head and eye velocity using video head impulse test equipment in patients with unilateral vestibular pathology scheduled for tumor resection via retrosigmoid approach (n=5) or labyrinthectomy due to Meniere's disease (n=2). RESULTS: We found 1) no difference in the ipsilesional aVOR gain for inward or outward directed head impulse rotations and 2) head velocity is inversely correlated with aVOR gain for ipsilesional but not contralesional rotations. CONCLUSIONS: Bedside testing of the ipsilesional aVOR following acute vestibular ablation can be done with head impulse rotations to either side. In the acute stages, physical therapists should prescribe ipsilesional and contralesional gaze stability exercises.
KW - Head impulse test
KW - vestibular rehabilitation
KW - VOR gain
UR - http://www.scopus.com/inward/record.url?scp=84920067662&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84920067662&partnerID=8YFLogxK
U2 - 10.3233/VES-140523
DO - 10.3233/VES-140523
M3 - Article
C2 - 25564082
AN - SCOPUS:84920067662
VL - 24
SP - 397
EP - 402
JO - Journal of Vestibular Research: Equilibrium and Orientation
JF - Journal of Vestibular Research: Equilibrium and Orientation
SN - 0957-4271
IS - 5-6
ER -