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TD‐P‐025: IMPROVING MOVEMENT CONFIDENCE AND BALANCE IN PEOPLE WITH DEMENTIA, MCI AND PHYSICAL IMPAIRMENT USING GROUP MOTION–BASED TECHNOLOGY
Author(s) -
Czarnuch Stephen M.,
Dove Erica,
Astell Arlene J.
Publication year - 2018
Publication title -
alzheimer's and dementia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.713
H-Index - 118
eISSN - 1552-5279
pISSN - 1552-5260
DOI - 10.1016/j.jalz.2018.06.2041
Subject(s) - balance (ability) , dementia , eyes open , physical medicine and rehabilitation , psychology , physical therapy , confidence interval , heel , medicine , disease , pathology , anatomy
visible destinations under different lighting (1⁄4target destination, 1⁄4middle,1⁄4distractor) and clutter (obstacle/no obstacle) conditions (total trials1⁄436) (Figure 1X, Y). Fixation and gait characteristics were assessed using mobile eye-tracking glasses and wearable feet-mounted motion sensors. Bottom-up saliency maps of participants’ egocentric field of view over time were computed. Saliency measures were used to assess the extent to which environmental features distinctive in colour or orientation predicted fixation position (Figure 1Z). Feet accelerations during fixations were calculated as indicators of hesitation based on lateral (x) and forwards/ backwards (y) movement. The mean saliency (MS) at fixation was modelled with a Generalised Estimating Equations model to test differences between groups and its relationship with movement. Results:Overall, tAD patients fixated on less salient regions (MS1⁄4 0.708) than controls (MS 1⁄4 0.845, p1⁄40.035); there was no evidence of a difference between PCA patients’ tendency to fixate salient regions (MS1⁄4 0.887) relative to controls (p 1⁄4 0.667). Relative to controls, patients showed increasedmodulation in lateral and forwards/backwards walking when fixating salient regions. Conclusions:Results support an elevated relationship between the visual saliency of environmental features, oculomotor and gait dynamics in patients with PCA and tAD. Identifying whether aspects of the visual environment hold particular consequences for patient function represents a key target in the development of strategies and settings to maximise patient independence. References: Shakespeare et al, Neuropsychologia, 2015.