Influence of Vestibular–Ocular Reflex Training on Postural Stability, Dynamic Visual Acuity, and Gaze Stabilization in Patients With Chronic Ankle Instability

2012 ◽  
Vol 4 (5) ◽  
pp. 220-229 ◽  
Author(s):  
Jessica R. Hilgendorf ◽  
Luzita I. Vela ◽  
Denise V. Gobert ◽  
Rod A. Harter
Keyword(s):  
Visual Acuity ◽  
Postural Stability ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Dynamic Visual Acuity ◽  
Gaze Stabilization ◽  
Ocular Reflex ◽  
Vestibular Ocular Reflex

scholarly journals Sport-specific differences in dynamic visual acuity and gaze stabilization in division-I collegiate athletes

2020 ◽  
Vol 30 (4) ◽  
pp. 249-257
Author(s):  
C. Quintana ◽  
N.R. Heebner ◽  
A.D. Olson ◽  
J.P. Abt ◽  
M.C. Hoch
Keyword(s):  
Visual Acuity ◽  
A Priori ◽  
Collegiate Athletes ◽  
Division I ◽  
Normative Values ◽  
Dynamic Visual Acuity ◽  
Gaze Stabilization ◽  
Concussion Management ◽  
Vestibular Ocular Reflex ◽  
Concussion History

BACKGROUND: The vestibular-ocular reflex (VOR) integrates the vestibular and ocular systems to maintain gaze during head motion. This reflex is often negatively affected following sport-related concussion. Objective measures of gaze stability, a function mediated by the VOR, such as the computerized dynamic visual acuity test (DVAT) and gaze stabilization test (GST), may have utility in concussion management. However, normative data specific to sport, sex, or concussion history have not been established in collegiate athletes. OBJECTIVE: The objective of this study was to establish normative values for the DVAT and GST in collegiate athletes and explore the effect of sport, sex, and concussion history on VOR assessments. METHODS: The DVAT and GST were completed by 124 collegiate athletes (72 male, 52 female, mean±SD, age: 19.71±1.74 years, height: 173.99±13.97 cm, weight: 80.06±26.52 kg) recruited from Division-I athletic teams (football, soccer and cheerleading). The DVAT and GST were performed in the rightward and leftward directions during a single session in a standardized environment. Normative values for DVAT and GST measures were expressed as percentiles. Non-parametric statistics were used to compare differences between groups based on sex, sport, and concussion history. Alpha was set a-priori at 0.05. RESULTS: Overall, the median LogMAR unit for 124 athletes completing the DVAT was 0 (IQR = 0.17) for both leftward and rightward. The median velocities achieved on the GST were 145 °/sec and 150 °/sec (IQR = 45 and 40) for the leftward and rightward directions respectively. Significant differences were observed between sports (p = 0.001–0.17) for the GST with cheerleading demonstrating higher velocities than the other sports. However, no significant differences were identified based on sex (p≥0.09) or history of concussion (p≥0.15). CONCLUSIONS: Normative estimates for the DVAT and GST may assist in the clinical interpretation of outcomes when used in post-concussion evaluation for collegiate athletes. Although sex and previous concussion history had no effect on the DVAT or GST, performance on these measures may be influenced by type of sport. Sport-related differences in the GST may reflect VOR adaptations based on individual sport-specific demands.

Effect of vestibular rehabilitation on passive dynamic visual acuity

2008 ◽  
Vol 18 (2-3) ◽  
pp. 147-157
Author(s):  
Matthew Scherer ◽  
Americo A. Migliaccio ◽  
Michael C. Schubert
Keyword(s):  
Visual Acuity ◽  
Exercise Program ◽  
Home Exercise ◽  
Dynamic Visual Acuity ◽  
Gaze Stabilization ◽  
Ocular Reflex ◽  
Gaze Stability ◽  
Before And After ◽  
Vestibulo Ocular Reflex ◽  
Head Impulses

While active dynamic visual acuity (DVA) has been shown to improve with gaze stabilization exercises, we sought to determine whether DVA during {passive} head impulses (pDVA) would also improve following a rehabilitation course of vestibular physical therapy (VPT) in patients with unilateral and bilateral vestibular hypofunction. VPT consisted of gaze and gait stabilization exercises done as a home exercise program. Scleral search coil was used to characterize the angular vestibulo-ocular reflex (aVOR) during pDVA before and after VPT. Mean duration of VPT was 66 ± 24 days, over a total of 5 ± 1.4 outpatient visits. Two of three subjects showed improvements in pDVA with a mean reduction of 43% (LogMAR 0.58 to 0.398 and 0.92 to 0.40). Our data suggest improvements in pDVA may be due in part to improvements in aVOR velocity and acceleration gains or reduced latency of the aVOR. Each subject demonstrated a reduction in the ratio of compensatory saccades to head impulses after VPT. Preliminary data suggest that active gaze stability exercises may contribute to improvements in pDVA in some individuals.

Effect of oculo-motor and gaze stability exercises on postural stability and dynamic visual acuity in healthy young adults

2011 ◽  
Vol 33 (4) ◽  
pp. 600-603 ◽  
Author(s):  
Hiroyuki Morimoto ◽  
Yuji Asai ◽  
Eric G. Johnson ◽  
Everett B. Lohman ◽  
Keiko Khoo ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Young Adults ◽  
Postural Stability ◽  
Dynamic Visual Acuity ◽  
Gaze Stability

Correlation of Head Impact Exposures With Vestibulo-Ocular Assessments

2020 ◽  
Vol 29 (3) ◽  
pp. 310-314 ◽  
Author(s):  
Theresa L. Miyashita ◽  
Paul A. Ullucci
Keyword(s):  
Visual Acuity ◽  
Cumulative Effect ◽  
Head Impact ◽  
Division I ◽  
Dynamic Visual Acuity ◽  
Head Impacts ◽  
Ocular Reflex ◽  
Gaze Stability ◽  
Vestibulo Ocular Reflex ◽  
Subconcussive Impacts

Context: Managing a concussion injury should involve the incorporation of a multifaceted approach, including a vision assessment. The frontoparietal circuits and subcortical nuclei are susceptible to trauma from a concussion injury, leading to dysfunction of the vestibulo-ocular system. Research investigating the effect of cumulative subconcussive impacts on neurological function is still in its infancy, but repetitive head impacts may result in vestibular system dysfunction. This dysfunction could create visual deficits, predisposing the individual to further head trauma. Objective: The purpose of this study was to investigate the cumulative effect of subconcussive impacts on minimum perception time, static visual acuity, gaze stability, and dynamic visual acuity scores. Design: Prospective cohort. Setting: Division I university. Patients: Thirty-three Division I men’s lacrosse players (age = 19.52 [1.20] y). Intervention: Competitive lacrosse season. Main Outcome Measures: At the beginning and end of the season, the players completed a vestibulo-ocular reflex assessment, using the InVision™ system by Neurocom® to assess perception, static acuity, gaze stability, and dynamic visual acuity. Score differentials were correlated with the head impact exposure data collected via instrumented helmets. Results: A significant correlation was found between change in perception scores and total number of head impacts (r = .54), and between changes in dynamic visual acuity loss scores on the rightside and maximum rotational acceleration (r = .36). No statistical differences were found between preseason and postseason vestibulo-ocular reflex variables. Conclusions: Cumulative subconcussive impacts may negatively affect vestibulo-ocular reflex scores, resulting in decreased visual performance. This decrease in vestibulo-ocular function may place the athlete at risk of sustaining additional head impacts or other injuries.

Comparison of the Gaze Stabilization Test and the Dynamic Visual Acuity Test in Unilateral Vestibular Loss Patients and Controls

2015 ◽  
Vol 36 (4) ◽  
pp. 746-753 ◽  
Author(s):  
Courtney C. J. Voelker ◽  
Amelia Lucisano ◽  
Dorina Kallogjeri ◽  
Belinda C. Sinks ◽  
Joel A. Goebel
Keyword(s):  
Visual Acuity ◽  
Dynamic Visual Acuity ◽  
Vestibular Loss ◽  
Gaze Stabilization ◽  
The Gaze ◽  
Visual Acuity Test ◽  
Acuity Test
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