Gait was assessed using a 7 m long × 0.6 m wide instrumented walkway (Platinum model Gaitrite, software version 4.5, CIR systems, USA) under single-task conditions. Participants were instructed to walk at their comfortable walking pace for 2 min around a 25 m oval circuit (Galna et al., 2013 (link)). To aid interpretation of gait outcomes, we used a model of gait that we developed for older adults and subsequently validated in PD. The model comprises 16 gait variables describing 5 independent domains of gait: pace (step velocity, mean step length, swing time variability), rhythm (step time, swing time, stance time), variability (step velocity variability, step length variability, step time variability, stance time variability), asymmetry (swing time asymmetry, step time asymmetry, stance time asymmetry), and postural control (step length asymmetry, mean step width, step width variability) (Lord et al., 2013a (link)).
Platinum model gaitrite
Manufactured by CIR Systems
Sourced in United States
The Platinum model Gaitrite is a lab equipment product designed for gait analysis. It provides quantitative measurements of various gait parameters.
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Lab products found in correlation
6 protocols using platinum model gaitrite
1
Gait Assessment in Older Adults and Parkinson's Disease
2
Gait Measurement in Stroke Patients
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Dimensions were 7.0 m × 0.6 m and had a spatial accuracy of 1.27 cm and a temporal accuracy of one sample (240 Hz, ~4.17 ms) (GaitRite: Platinum model GaitRite, software version 4.5, CIR systems, NJ, USA). Gaitrite has been used extensively in the quantification of spatio-temporal measures in stroke [8 (link), 28 (link)].
High-cost wearable system The OPAL wireless accelerometer-based wearable system (APDM, Inc., Portland, OR, USA,https://www.apdm.com/wearable-sensors ) comprises a tri-axial accelerometer, gyroscope and magnetometer [18 (link)] (128 Hz, 8Gb, 16 h of logging 8 h of streaming). The OPAL system has been used previously in stroke for quantification of spatio-temporal measures [18 (link), 20 (link)]. Only accelerometer data were used in the analysis.
High-cost wearable system The OPAL wireless accelerometer-based wearable system (APDM, Inc., Portland, OR, USA,
3
Gait Analysis of Parkinson's Patients
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Gait was assessed using a 7 m long × 0.6 m wide instrumented walkway (Platinum model Gaitrite, software version 4.5, CIR systems, United States of America). Participants were instructed to walk at their comfortable walking pace for 2 min around a 25 m oval circuit under single and dual task conditions. We measured 16 independent gait characteristics that conform to a model of gait that has been validated in PD and comprises five independent domains (pace, variability, rhythm, asymmetry and postural control) [21 (link)].
4
Gait and Upper Body Kinematics Assessment
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All participants walked for two minutes at their preferred pace around a 25 m circuit, fully described in [27 (link)]. Spatiotemporal gait variables (walking speed, step time, step length, and step width) were measured using a 7 m long Gaitrite pressure activated electronic walkway (Platinum model Gaitrite, software version 4.5, CIR systems, United States of America). Upper body accelerations were measured using three OPAL inertial sensors sampling at 128 Hz (APDM Inc, Portland, OR, USA) located at 5th lumbar vertebra to represent the pelvis level (P), the 7th cervical vertebra to represent the shoulder level (S) and upon the back of the head (H). The Gaitrite and the OPAL system were synchronised and the data was collected using the same A/D converter.
5
Gait and Accelerometry in Parkinson's Disease
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Fifty-four community dwelling older adults and sixty people with early onset PD walked at their preferred pace for two minutes around a 25 m circuit containing 7 m long Gaitrite pressure activated electronic walkway (Platinum model Gaitrite, software version 4.5, CIR systems, United States of America) (see Table 1 for participant sand spatiotemporal information) [18] (link). Upper body accelerations were measured using three IMUs (128 Hz, Opal™, APDM Inc, Portland, OR, USA) located at 5th lumbar vertebra to represent movements at the pelvis level (P), the 7th cervical vertebra to represent movements at the shoulder level (S) and upon the back of the head (H). The sensors were placed so that the X axis pointed downwards representing the vertical direction (V), the Y axis pointed to the left representing the medio-lateral direction (ML) and the Z axis pointed backwards representing the anterior-posterior direction (AP). The Gaitrite and the IMUs were synchronised (±1 sample) using a custom-made cable and the data was collected using the same A/D converter.
6
Gait Analysis using Instrumented Walkway
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All participants were tested on medication and walked at their preferred pace for two minutes around a 25 m circuit containing a 7 m long pressure sensitive electronic walkway (Platinum model GAITRite, software version 4.5, CIR systems, United States of America) [14] (link). Accelerations were measured using two IMUs (128 Hz, Opal™, APDM Inc, Portland, OR, USA) located at 5th lumbar vertebra, to represent movement of the pelvis, and upon the back of the head. The sensor's X axis pointed downwards representing the vertical direction (V), the Y axis pointed to the left representing the medio-lateral direction (ML) and the Z axis pointed backwards representing the anterior-posterior direction (AP). The instrumented walkway and the IMUs were synchronised (±1 sample) using a custom-made cable and the data was collected at 128 Hz using the same A/D converter. The acceleration data was segmented based upon the timing values obtained from the instrumented walkway meaning only straight line walking while in contact with the walkway was analysed.
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