NCT Number: NCT01895608
The first goal of this study is to examine the extent to which the inclusion of dual-task practice to standard balance rehabilitation results in greater benefits to dual-task ability. The second goal of this study is to examine the extent to which the addition of cognitive training following balance rehabilitation results in greater benefits to dual-task ability.
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Notify Me60 year–89 year
All sexes
Interventional
Not applicable
Atlanta VA Medical and Rehab Center, Decatur, GA, Decatur, Georgia, United States
Historically, degradation of balance control in older adults has been attributed to impairments of the motor and/or sensory systems. As a result, therapy has focused on motor and sensory impairments. However, evidence suggests that an impaired ability to allocate attentional resources to balance during dual-task situations is a powerful predictor of falls. Despite this fact, few studies have examined whether interventions can improve older adults' dual-task ability. The goal of this study is to develop effective interventions to improve ability to allocate attention to balance and gait under dual-task conditions.
Older adults (n = 44) who have been referred to physical therapy (PT) for gait or balance impairments who have dual-task impairment will be randomized to receive either standard balance rehabilitation or balance rehabilitation with dual-task practice. Following PT, subjects will receive cognitive training (CT), either speed of processing or generalized cognitive training. Primary outcomes are ability to walk while performing four different cognitive tasks of varying difficulty. Assessment will occur at baseline, post-PT, post-CT.
Healthy volunteers accepted: Yes
Only the study team can determine whether someone qualifies for participation.
Inclusion criteria
Exclusion criteria
Balance rehabilitation will involve a structured framework of balance activities that require increasing levels of complexity and multimodal stimuli and response demands with the addition of cognitive tasks, (e.g., counting backwards or reciting lists) to be added when the participant
Standard balance rehabilitation will involve a structured framework of balance activities that require increasing levels of complexity and multimodal stimuli and response demands.
Speed of processing cognitive training involves systematically increasing the complexity of visual tasks. Task demands are increased by reducing stimulus duration, adding visual or auditory distractors, increasing number of concurrent tasks or increasing the visual field.
General cognitive training involves systematic training of 14 key cognitive abilities, including visual scanning, response time, eye-hand coordination, spatial perception, and working memory. Initial starting point is determined by the software using baseline evaluation.
Time frame: baseline and 6 weeks
Timed up and go test (TUG) has three conditions: no secondary task (TUG), cognitive (TUGc) and manual dual-tasks (TUG-m). Time to complete the task with the cognitive task was recorded as a primary outcome measure. Time greater than 15 s for TUG-c indicates impaired dual-task ability.
Time frame: baseline and 6 weeks
The walk while talk (WWT) test involves walking at preferred speed while performing a verbal fluency task.
Time frame: baseline and 6 weeks
Dynamic Gait Index (DGI) assesses gait under 8 conditions and has excellent interrater as well as test-retest reliability.
Each of the 8 conditions is scored on a scale from 0 (indicating severe impairment) to 3 (indicating normal ability). The total score is used for statistical analysis with a maximum score of 24 and a minimum score of 0 with a higher score indicating better performance. A total DGI score less than 20 out of 24 indicates fall risk.
Time frame: baseline and 6 weeks
SOT is organized into a series of 6 conditions of increasing difficulty: 3 involve a firm surface with eyes open, eyes closed and with vision sway-referenced and 3 involve a sway-referenced surface with eyes open, eyes closed, and with vision sway-referenced. SOT has good reliability and differentiates fallers and nonfallers.
The SOT composite score is used for statistical analysis with a maximum score of 100 (indicating perfect stability) and a minimum score of 0 (indicating severe instability). Higher scores indicate better performance (i.e., greater postural stability) and SOT composite scores less than 38 out of 100 indicate fall risk.
Time frame: baseline and 6 weeks
Subjects walk at their preferred speed and time to walk 6 m is recorded.
Time frame: baseline and 6 weeks
Subjects' decreased confidence in a variety of situations will be measured using the Activities-specific Balance Confidence scale which has good test-retest reliability. Sixteen activities are each assessed on a scale ranging from 0 to 100, where higher scores indicate greater confidence in performing the activity. Item scores are averaged to arrive at a final score, where average scores <67% indicate a greater fall risk.
VA Office of Research and Development
Fed
Cognitive Training and Dual-task Ability in Older Adults
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