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Susan L Whitney

Publications and source records attributed to Susan L Whitney.

At least 19 recordsLinked to original sources
PubMed2007

The reliability and validity of the Four Square Step Test for people with balance deficits secondary to a vestibular disorder.

OBJECTIVE: To determine the reliability and validity of the Four Square Step Test (FSST) for use in people with balance deficits secondary to vestibular disorders, who frequently report falling and have difficulty with changes of direction. DESIGN: Cross-sectional descriptive study. SETTING: Outpatient clinic. PARTICIPANTS: Thirty-two people with balance deficits secondary to vestibular disorders (mean age, 63.7+/-17.8y) who were currently enrolled in a vestibular physical therapy program agreed to participate. INTERVENTIONS: Participants performed the FSST, the Timed Up & Go (TUG) test, an 11-m walk test during which walking speed was recorded, and the Dynamic Gait Index (DGI) and completed the Dizziness Handicap Inventory (DHI) and the Activities-Specific Balance Confidence (ABC) Scale. MAIN OUTCOME MEASURES: The main outcome measures were the FSST time, TUG results, DGI score, gait velocity, and DHI and ABC scores. Number of fall risk factors, as determined by published scores for people at risk for falling on the TUG test and gait speed, and number of falls were compared with FSST scores. RESULTS: The FSST has good reliability (intraclass correlation coefficient, model 3,1: .93; 95% confidence interval, .86-.96) and had good correlations with the other gait measures (correlation coefficients for the TUG, .69; gait speed, .65; DGI, -.51) and poor correlations with the DHI and the ABC (DHI, -.13; ABC, -.12). Multivariate linear regression showed that 51.5% of FSST performance was explained by TUG score and gait speed. The mean FSST time differed significantly between groups with 0 (n=12), 1 (n=12), or 2 to 3 (n=8) risk factors for falls (analysis of variance, F=10.02; P<.01). A cutoff score of greater than 12 seconds on the FSST was associated with a sensitivity of 80% and specificity of 92% for the identification of subjects with 1 or more risk factors for falls. CONCLUSIONS: The FSST is a reliable and valid tool for measuring the ability to perform multidirectional movements in people with balance deficits secondary to vestibular disorders.

Accidental Falls↗
PubMed2006

Construction and validation of the 4-item dynamic gait index.

BACKGROUND AND PURPOSE: People with balance disorders often have difficulty walking. The purpose of this study was to develop and test the psychometric properties of a short form of the Dynamic Gait Index (DGI) for the clinical measurement of walking function in people with balance and vestibular disorders. SUBJECTS: A total of 123 subjects with such disorders (test subjects) and 103 control subjects were included in this study. METHODS: Rasch and factor analyses were used to create a short form of the DGI. Internal consistency and discriminative validity for test subjects versus control subjects and for falling versus nonfalling test subjects were evaluated. RESULTS: Four items were selected for the shorter version of the test: gait on level surfaces, changes in gait speed, and horizontal and vertical head turns. DISCUSSION AND CONCLUSION: The clinical psychometric properties of the 4-item DGI were equivalent or superior to those of the 8-item test. The 4-item DGI can be used by clinicians to measure gait in people with balance and vestibular disorders without compromising important clinical measurement characteristics.

Adolescent↗
PubMed2006

Physical therapy for central vestibular dysfunction.

OBJECTIVE: To determine if vestibular physical therapy (PT) leads to improved functional outcomes in people with central vestibular dysfunction. DESIGN: Retrospective case series. SETTING: Outpatient PT clinic. PARTICIPANTS: Forty-eight patients with central vestibular dysfunction met the criteria for inclusion in this retrospective chart review. The 48 patients were divided into various subgroups including central vestibulopathy, cerebellar dysfunction, stroke, mixed central and peripheral vestibulopathy, and posttraumatic central disorders. INTERVENTION: Patients were treated with a custom-designed PT program for a mean of 5 visits over an average of 5 months. MAIN OUTCOME MEASURES: Patients completed the Activities-Specific Balance Confidence Scale, the Dizziness Handicap Inventory (DHI), the Dynamic Gait Index, the Timed Up & Go test, and the Five Times Sit-to-Stand (FTSTS) Test. RESULTS: Significant differences were demonstrated between initial evaluation and discharge in each of the assessment measures for the entire group. Post hoc tests were performed to determine if there was a significant difference in any of the assessment measures by diagnosis. Central vestibular diagnostic subgroup was shown to affect pre- to postintervention differences in the functional and disability measures (P< or =.05). With the exception of the FTSTS, effect sizes of change due to PT intervention were greater in those persons with severe disability at baseline as determined by a DHI score of more than 60. CONCLUSIONS: Patients with central vestibular dysfunctions improved in both subjective and objective measures of balance after PT intervention. Persons with cerebellar dysfunction improved the least.

Aged↗
PubMed2006

The relationship between falls history and computerized dynamic posturography in persons with balance and vestibular disorders.

OBJECTIVE: To describe the relationship between Sensory Organization Test (SOT) scores and reported falls in persons with vestibular and balance disorders. DESIGN: Descriptive cross-sectional. SETTING: Outpatient tertiary balance and falls clinic. PARTICIPANTS: One hundred physical therapy (PT) charts of people referred to a balance and falls clinic were reviewed. Criteria for inclusion were that the patients had completed the SOT of computerized dynamic posturography (CDP), had a vestibular diagnosis, and had the numbers of falls recorded from patient report within the last 6 months at the initial examination. Rotational chair, caloric testing, oculomotor test, and Activities-Specific Balance Confidence (ABC) results were recorded, if available. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: The SOT composite and ABC scores as they related to reports of falls in the last 6 months. RESULTS: The overall proportion of persons with vestibular disorders with positive 6-month history for 1 or more falls was 30% and for recurrent falls (>/=2) was 17%. Vestibular laboratory findings, age, sex, and vestibular diagnosis were not related to reported falls status. Patients who reported multiple falls prior to the PT examination had lower SOT composite scores than patients who reported 1 or no falls in the previous 6 months. The receiver operating characteristic curve identified a composite SOT score of less than 38 as demonstrating the highest likelihood ratio for differentiating between those people who reported no falls in the past 6 months and those who reported 2 or more falls. CONCLUSIONS: Persons who are recurrent fallers perform worse on SOT than either nonfallers or 1-time fallers. CDP performance can help guide the clinician in the development of a safe exercise program.

Accidental Falls↗
PubMed2006

Responses to a virtual reality grocery store in persons with and without vestibular dysfunction.

People with vestibular dysfunction often complain of having difficulty walking in visually complex environments. Virtual reality (VR) may serve as a useful therapeutic tool for providing physical therapy to these people. The purpose of this pilot project was to explore the ability of people with and without vestibular dysfunction to use and tolerate virtual environments that can be used in physical therapy. We have chosen grocery store environments, which often elicit complaints from patients. Two patients and three control subjects were asked to stand and navigate in VR grocery stores while finding products. Perceived discomfort, simulator sickness symptoms, distance traveled, and speed of head movement were recorded. Symptoms and discomfort increased in one subject with vestibular dysfunction. The older subjects traveled a shorter distance and had greater speed of head movements compared with young subjects. Environments with a greater number of products resulted in more head movements and a shorter distance traveled.

Activities of Daily Living↗
PubMed2006

The use of nonthrust manipulation in an adolescent for the treatment of thoracic pain and rib dysfunction: a case report.

STUDY DESIGN: Case report. BACKGROUND: Back pain is a common presentation of patients in the orthopedic physical therapy setting. In an athletic environment, back pain can limit an athlete's ability to perform running, cutting, and throwing. This case report describes the use of a spinal nonthrust manipulation in conjunction with therapeutic exercise for the management of thoracic and rib pain in an adolescent athlete. CASE DESCRIPTION: A 16-year-old male presented to the outpatient clinic without physician referral. His chief complaint was right-sided thoracic and rib pain during running, jumping, cutting, and kicking that began 1 month before the initial physical therapy visit. He had no previous episodes of pain or associated injuries. A screening examination for serious underlying pathology was negative. After physical examination, it was determined that manual therapy was indicated. A thoracic nonthrust manipulation was applied to the painful area (the right-side thoracic facet joints of segments 5-7). OUTCOMES: Immediately after the thoracic nonthrust manipulation, the patient experienced a decrease in tenderness to palpation of the thoracic erector spinae musculature and the associated intercostal spaces of ribs 6 through 8 (a decrease of 1-2 points on the pain scale), an increase in thoracic side-bending active range of motion recorded at T3 and T9, and improved chest expansion, which had been limited by pain before treatment. DISCUSSION: This case report demonstrates the use of a spinal nonthrust manipulation that seems to have helped an adolescent return to pain-free sports activity, with an immediate decrease in pain after 1 visit. Follow-up telephone calls were made 1 month and 9 months after treatment, in which no return of symptoms was reported.

Adolescent↗
PubMed2006

Use of the physical performance test to assess preclinical disability in subjects with asymptomatic carotid artery disease.

BACKGROUND AND PURPOSE: The purpose of this study was to determine whether subjects with asymptomatic carotid artery stenosis and occlusion demonstrate deficits in physical performance compared with a comparison group. These deficits may indicate that a person is demonstrating preclinical disability. SUBJECTS: Seventy-one subjects with no known disease and 39 subjects with asymptomatic carotid artery stenosis of moderate and severe degrees or with occlusion were included. METHODS: Physical performance was assessed with the 9-item and 7-item versions of the Physical Performance Test (PPT). Individual tasks also were timed for the subjects with disease. RESULTS: There were significant differences between the comparison group and the subjects with carotid artery stenosis on the 9-item PPT (P<.00) and on the 7-item PPT (P<.03). Subjects with asymptomatic carotid artery stenosis and occlusion demonstrated less than optimal performance on the PPT (9-item PPT, mean=27 of 36; 7-item PPT, mean=21 of 28). Subjects with moderate stenosis were the slowest in performing the task of simulated eating. DISCUSSION AND CONCLUSION: Subjects with asymptomatic carotid artery stenosis and occlusion exhibited changes in function, as indicated by their performance on the PPT relative to that of a comparison group. This finding may be indicative of preclinical disability, indicating that these people are symptomatic. This indication may affect the medical and surgical options that can be considered for their care.

Activities of Daily Living↗
PubMed2005

The relationship between the Activities-specific Balance Confidence Scale and the Dynamic Gait Index in peripheral vestibular dysfunction.

BACKGROUND AND PURPOSE: People with vestibular dysfunction experience dizziness, vertigo and postural instability. The persistence of these symptoms may result in decreased balance confidence. The purpose of the present study was to examine the relationship between decreased balance confidence and gait dysfunction in patients with unilateral peripheral vestibular dysfunction. METHOD: A retrospective review of 137 charts with the Activities-specific Balance Confidence (ABC) Scale and the Dynamic Gait Index (DGI) scores was completed. Spearman rank-order correlation analysis was performed of the total sample, by age group and by degree of vestibular weakness. RESULTS: A moderate correlation of r = 0.58 (p < 0.001) was found between the ABC Scale score and the DGI score in the total sample. Those with mild or moderate vestibular weakness had a correlation of r = 0.72 (p < 0.001) between the ABC Scale score and the DGI score, compared with a correlation of r = 0.48 in those with severe or total vestibular weakness. CONCLUSIONS: Decreased balance confidence and increased fall risk are critical issues for people with vestibular dysfunction. The effects of aging did not have a significant impact on the relationship. The correlation between balance confidence and gait dysfunction was stronger in those with mild or moderate vestibular weakness, although those with severe or total weakness were more disabled by their vestibular symptoms.

Adult↗
PubMed2005

Otoneurology.

Explore the source record for details and available documents.

Humans↗
PubMed2005

Usefulness of the dizziness handicap inventory in the screening for benign paroxysmal positional vertigo.

OBJECTIVE: The purpose of the study was to determine whether a newly developed subscale of the Dizziness Handicap Inventory (DHI) could assist in the screening of benign paroxysmal positional vertigo (BPPV). STUDY DESIGN: Retrospective case review. SETTING: Tertiary balance referral center. PATIENTS: Charts of 383 patients (mean age, 61 yr) with a variety of vestibular diagnoses (peripheral and central) were reviewed. INTERVENTIONS: Patients completed the DHI before the onset of physical therapy intervention. MAIN OUTCOME MEASURES: A newly developed BPPV subscale developed from current DHI items was computed to determine whether the score could assist the practitioner in identifying individuals with BPPV. RESULTS: Individuals with BPPV had significantly higher mean scores on the newly developed BPPV subscale of the DHI (p < 0.01). The five-item BPPV score was a significant predictor of the likelihood of having BPPV (chi2 = 8.35; p < 0.01). On the two-item BPPV scale, individuals who had a score of 8 of 8 were 4.3 times more likely to have BPPV compared with individuals who had a score of 0. CONCLUSION: Items on the DHI appear to be helpful in determining the likelihood of an individual having the diagnosis of BPPV.

Adolescent↗
PubMed2005

Acrophobia and pathological height vertigo: indications for vestibular physical therapy?

BACKGROUND AND PURPOSE: Acrophobia (fear of heights) may be related to a high degree of height vertigo caused by visual dependence in the maintenance of standing balance. The purpose of this case report is to describe the use of vestibular physical therapy intervention following behavioral therapy to reduce a patient's visual dependence and height vertigo. CASE DESCRIPTION: Mr N was a 37-year-old man with agoraphobia (fear of open spaces) that included symptoms of height phobia. Exposure to heights triggered symptoms of dizziness. Intervention. Mr N underwent 8 sessions of behavioral therapy that involved exposure to heights using a head-mounted virtual reality device. Subsequently, he underwent 8 weeks of physical therapy for an individualized vestibular physical therapy exercise program. OUTCOMES: After behavioral therapy, the patient demonstrated improvements on the behavioral avoidance test and the Illness Intrusiveness Rating Scale, but dizziness and body sway responses to moving visual scenes did not decrease. After physical therapy, his dizziness and sway responses decreased and his balance confidence increased. DISCUSSION: Symptoms of acrophobia and sway responses to full-field visual motion appeared to respond to vestibular physical therapy administered after completion of a course of behavioral therapy. Vestibular physical therapy may have a role in the management of height phobia related to excessive height vertigo.

Adult↗
PubMed2005

Clinical measurement of sit-to-stand performance in people with balance disorders: validity of data for the Five-Times-Sit-to-Stand Test.

BACKGROUND AND PURPOSE: People with balance disorders are characterized as having difficulty with transitional movements, such as the sit-to-stand movement. A valid and feasible tool is needed to help clinicians quantify the ability of people with balance disorders to perform transitional movements. The purpose of this study was to describe the concurrent and discriminative validity of data obtained with the Five-Times-Sit-to-Stand Test (FTSST). The FTSST was compared with the Activities-specific Balance Confidence Scale (ABC) and the Dynamic Gait Index (DGI). SUBJECTS AND METHODS: Eighty-one subjects without balance disorders and 93 subjects with balance disorders were recruited for the study. Each subject was asked to stand from a 43-cm-high chair 5 times as quickly as possible. The ABC and DGI scores were recorded. RESULTS: Subjects with balance disorders performed the FTSST more slowly than subjects without balance disorders. Discriminant analysis demonstrated that the FTSST correctly identified 65% of subjects with balance dysfunction, the ABC identified 80%, and the DGI identified 78%. The ability of the FTSST to identify subjects with balance dysfunction was better for subjects younger than 60 years of age (81%). DISCUSSION AND CONCLUSION: The FTSST displays discriminative and concurrent validity properties that make this test potentially useful in clinical decision making, although overall the ABC and the DGI are better than the FTSST at discriminating between subjects with and subjects without balance disorders.

Adolescent↗
PubMed2004

Simulator sickness when performing gaze shifts within a wide field of view optic flow environment: preliminary evidence for using virtual reality in vestibular rehabilitation.

BACKGROUND: Wide field of view virtual environments offer some unique features that may be beneficial for use in vestibular rehabilitation. For one, optic flow information extracted from the periphery may be critical for recalibrating the sensory processes used by people with vestibular disorders. However, wide FOV devices also have been found to result in greater simulator sickness. Before a wide FOV device can be used in a clinical setting, its safety must be demonstrated. METHODS: Symptoms of simulator sickness were recorded by 9 healthy adult subjects after they performed gaze shifting tasks to locate targets superimposed on an optic flow background. Subjects performed 8 trials of gaze shifting on each of the six separate visits. RESULTS: The incidence of symptoms of simulator sickness while subjects performed gaze shifts in an optic flow environment was lower than the average reported incidence for flight simulators. The incidence was greater during the first visit compared with subsequent visits. Furthermore, the incidence showed an increasing trend over the 8 trials. CONCLUSION: The performance of head unrestrained gaze shifts in a wide FOV optic flow environment is tolerated well by healthy subjects. This finding provides rationale for testing these environments in people with vestibular disorders, and supports the concept of using wide FOV virtual reality for vestibular rehabilitation.

Journal Article↗
PubMed2004

The effect of foot position on the modified clinical test of sensory interaction and balance.

OBJECTIVES: To determine whether there was a difference in the timed scores on a modified version of the Clinical Test of Sensory Interaction and Balance (CTSIB) with the feet apart versus feet together and to correlate modified CTSIB scores with Sensory Organization Test (SOT) scores. DESIGN: Prospective correlational study. SETTING: Outpatient clinic. PARTICIPANTS: Thirty patients (mean age, 58+/-17 y) with vestibular dysfunction who were undergoing vestibular therapy. INTERVENTIONS: Subjects completed the modified CTSIB with their feet together and feet apart at the end of a vestibular therapy session. Subjects also completed the SOT on the same day. MAIN OUTCOME MEASURES: Modified CTSIB scores (feet together, feet apart) and SOT scores. RESULTS: Modified CTSIB scores were slightly lower when performed with feet together as compared with feet apart. However, no statistically significant difference existed between scores on the modified CTSIB with feet together versus feet apart using the Wilcoxon signed-rank test (P<.05). The modified CTSIB correlated more strongly with SOT scores when performed with feet together than with feet apart using the Spearman rho. CONCLUSIONS: Scores on the modified CTSIB performed with the feet together did not differ from scores on the modified CTSIB performed with the feet apart. In persons with vestibular disorders, the CTSIB done with the feet together correlated more closely with the SOT.

Adult↗
PubMed2004

The influence of footwear on timed balance scores of the modified clinical test of sensory interaction and balance.

OBJECTIVES: To determine if timed balance scores on the modified Clinical Test of Sensory Interaction and Balance (CTSIB) were affected by shoe wear in patients with balance and vestibular disorders and to determine if there is a difference in correlation with the Sensory Organization Test (SOT) or in the sensitivity or specificity based on footwear. DESIGN: Prospective correlational trial. SETTING: Outpatient clinic. PARTICIPANTS: Thirty persons (mean age, 63+/-17 y) currently undergoing vestibular physical therapy (PT). INTERVENTION: All subjects completed the modified CTSIB with their shoes on and off at the end of a PT session; 16 of them (53%) also completed the SOT on the same day. MAIN OUTCOME MEASURES: Scores on the modified CTSIB and SOT. RESULTS: No difference existed between scores on the modified CTSIB with shoes on versus off. Similar correlation was found between the modified CTSIB performed with the shoes on and off and SOT scores. The sensitivity and specificity of the modified CTSIB was similar with shoes on and off. CONCLUSIONS: The modified CTSIB can be performed with or without shoes, with no difference expected in patient score or test sensitivity or specificity.

Adult↗
PubMed2004

Is perception of handicap related to functional performance in persons with vestibular dysfunction?

OBJECTIVE: The purpose of this study was to determine if scores between 0 and 30 (mild), 31 and 60 (moderate), and 61 and 100 (severe) on the Dizziness Handicap Inventory (DHI) differentiated a person's functional abilities. STUDY DESIGN: Retrospective case series. SETTING: Tertiary balance outpatient center. PATIENTS: Patients (n = 85; mean age, 61 years) with a variety of vestibular diagnoses participated. INTERVENTIONS: Patients completed the DHI, the Dynamic Gait Index (DGI), the 5 times sit to stand test (FTSST), the Activities-specific Balance Confidence (ABC) scale, gait speed, and the Timed "Up & Go" (TUG) during the same session. Reported numbers of falls within the last 4 weeks were recorded. MAIN OUTCOME MEASURES: The DGI, FTSST, ABC, gait speed, TUG, and gait speed were compared among DHI groups. RESULTS: Significant differences were identified using an analysis of variance between DHI groups on the DGI, the FTSST, ABC, and number of falls (p < 0.05). A significant difference was found between DHI groups (mild vs. severe and moderate vs. severe) on the DGI (p < 0.05) with greater DHI scores exhibiting more impaired walking. The FTSST was different between DHI groups mild and severe and DHI groups moderate and severe (p < 0.05), with slower FTSST scores with higher DHI scores. Reported falls were higher among the severe DHI group and the other 2 DHI groups (p < 0.05). All 3 DHI groupings were different from each other on the ABC (p < 0.001). CONCLUSION: Patients who perceive a greater handicap as a result of dizziness demonstrate greater functional impairment than patients who perceive less handicap from dizziness.

Adolescent↗