Background. Many approaches are used to evaluate fall risk. While their properties and performance vary, most reflect at a specific moment or based on subjective self-report. Objective. To quantify risk in the home setting using an accelerometer. Methods. Seventy-one community-living older adults were studied. In laboratory, was assessed performance-based tests of mobility (eg, Timed Up Go) usual walking abilities quantified. Subsequently, subjects wore triaxial accelerometer lower back for...

Background Patients with Parkinson's disease (PD) suffer from a high fall risk. Previous approaches for evaluating risk are based on self-report or testing at given time point and may, therefore, be insufficient to optimally capture We tested, the first time, whether metrics derived 3 day continuous recordings associated in PD. Methods Materials 107 patients (Hoehn & Yahr Stage: 2.6±0.7) wore small, body-fixed sensor (3D accelerometer) lower back days. Walking quantity (e.g., steps per...

To develop an automated and objective method to assess mobility in Parkinson disease (PD) patients daily-life settings investigate whether accelerometer-derived measures discriminate between PD healthy controls as they walk simulate activities of daily living (ADL).Healthy older adults (17) with (22) wore a triaxial accelerometer on their lower back during short walks (validation study) around the medical center (ADL simulation). The variability (consistency rhythmicity) stepping was...

The Timed Up and Go (TUG) test is a widely used measure of mobility fall risk among older adults that typically scored using stopwatch. We tested the hypothesis body-fixed accelerometer can enhance ability TUG to identify community-living with relatively high unknown origin. Twenty-three elderly fallers (76.0 ± 3.9 years) 18 healthy controls (68.3 9.1 performed while wearing 3D-accelerometer on lower back. Acceleration-derived parameters included Sit-to-Stand Stand-to-Sit times, amplitude...

Objectives To assess whether different T imed U p and G o ( TUG ) subtasks are affected differently in older adults with mild cognitive impairment MCI specific to abilities. Design Cross‐sectional. Setting Community home. Participants Older without dementia (N = 347; mean age 83.6 ± 3.5, 75% female, 19.3% participating the R ush M emory A ging P roject. Measurements Subjects wore a small, light‐weight sensor that measured acceleration angular velocity while they performed instrumented (i )....

Daily activities require the ability to dual task (DT), utilizing cognitive resources while walking negotiate complex environmental conditions. For older adults, these additional demands often lead reduced gait quality that increases risk of falls. The aim this study was assess whether a combined intervention, consisting treadmill training (TT) performing DT, improves and motor performance in adults with history multiple falls.A repeated measures design used evaluate effects 10 elderly...

Difficulty in turning while walking is common among patients with Parkinson's disease (PD). This difficulty often leads to significant disability, falls and loss of function; moreover, a trigger for freezing gait (FoG). We hypothesized that the quantity quality mobility during daily life would be different subjects PD without FoG. Here, we investigated, first time, as it relates FoG people using single inertial sensor. Ninety-four (among whom twenty-five had FoG) wore an sensor attached by...

Objective The identification and documentation of subclinical gait impairments in older adults may facilitate the appropriate use interventions for preventing or delaying mobility disability. We tested whether measures derived from a single body-fixed sensor worn during traditional Timed Up Go (TUG) testing could identify community dwelling without Methods used data 432 dementia (mean age 83.30±7.04 yrs, 76.62% female) participating Rush Memory Aging Project. TUG was conducted while subjects...

Abstract Background Falls are a major source of morbidity and mortality among older adults. Unfortunately, self-report is, to large degree, the gold-standard method for characterizing quantifying fall frequency. A number studies have demonstrated that near falls predict may occur more frequently than falls. These suggest might be an appropriate risk measure. However, date, such investigations also relied on self-report. The purpose present study was develop automatic detection falls,...

Abstract Freezing of gait (FOG) is one the most disabling symptoms that affect patients with Parkinson's disease (PD). Although pathophysiology underlying FOG largely remains an enigma, several lines evidence suggest autonomic nervous system might be involved. To this end, we tested hypothesis heart rate (HR) increases during and, further, HR just before FOG. evaluate these hypotheses, 15 healthy older adults, 10 PD who experienced FOG, and did not were studied. Patients their “off”...

The objective of this study is to investigate the value dual-task performance for prediction falls in patients with Parkinson's disease (PD). Two hundred sixty-three PD (H&Y 1–3, 65.2 ± 7.9 years) walked two times along a 10-m trajectory, both under single-task and (DT) conditions (combined an auditory Stroop task). To control cueing effect, stimuli were presented at variable or fixed 1- 2-s intervals. task was also performed alone. Dual-task costs calculated gait speed, stride length, time,...

Functional performance-based tests like the Timed Up and Go test (TUG) its subtasks have been associated with fall risk, future disability, nursing home admission, other poor outcomes in older adults. However, a single measurement laboratory may not fully reflect subject's condition everyday performance. To begin to validate an approach based on long-term, continuous monitoring, we investigated sit-to-walk walk-to-sit transitions performed spontaneously naturally during daily living. Thirty...

Objective To provide objective measures which characterize mobility in older adults assessed the community setting and to examine extent these are associated with parkinsonian gait. Methods During conventional testing community-setting, 351 ambulatory non-demented Memory Aging Project participants wore a belt whole body sensor that recorded both acceleration angular velocity 3 directions. We used derived from recordings quantify 5 subtasks including a) walking, b) transition sit stand, c)...

In this study, the use of an instrumented balance test based on inertial sensors was evaluated in patients with Parkinson's disease (PD). We aimed to objectively characterize motor subtypes PD [tremor dominant (TD) and postural instability gait difficulty (PIGD)], help quantitatively classify subjects into subtypes. Subjects were studied performing tests, while wearing a device including tri-axial accelerometer lower back, four different experimental conditions that depended feet position...

Background: Patients with Parkinson's disease (PD) suffer from impaired gait and mobility. These changes in motor function have been associated cognitive deficits that also commonly co-occur PD, especially executive (EF) attentio

The present study compares phase-dependent measures of local dynamic stability daily life walking with 35 conventional gait features in their ability to discriminate between community-dwelling older fallers and nonfallers. reanalyzes 3D-acceleration data 3-day activity from 39 people who reported less than 2 falls during one year 31 two or more falls. Phase-dependent was defined for initial perturbation at 0%, 20%, 40%, 60%, 80% the step cycle. A partial least square discriminant analysis...

<b>Aim:</b> To elucidate the optical basis for unilateral high myopia and to identify factors associated with its development. <b>Methods:</b> Medical records of 48 children (aged 4 months 17 years; mean age 6.8 years) (5 dioptres or more) seen consecutively by author during a 15 year period were reviewed. 45 (94%) patients had axial myopia. <b>Results:</b> The refractive difference between paired eyes was 9.4 (SD 3.6) more myopic eye on average 3.3 (1.8) mm longer than less eye. All but...