Trunk Angular Kinematics during Slip-Induced Falls and Activities of Daily Living - Towards Developing a Fall Detector

2009 ◽  
Vol 53 (14) ◽  
pp. 892-896
Author(s):  
Jian Liu ◽  
Thurmon E. Lockhart
Keyword(s):  
Angular Velocity ◽  
Activities Of Daily Living ◽  
Daily Living ◽  
Simultaneous Occurrence ◽  
Motion Analysis System ◽  
Optical Motion ◽  
Analysis System ◽  
Trunk Extension ◽  
Velocity Average ◽  
Fall Detector

The purpose of the current study was to investigate the trunk angular kinematics (i.e., angle and angular velocity) during slip-induced falls and activities of daily living (ADLs), with the aim to facilitate the development of a new fall detector. Ten elderly participated in a laboratory experiment, composed of normal walking, slip-induced falls, and 5 types of ADLs. Sagittal trunk kinematics was measured from optical motion analysis system. Angular phase plots were utilized to characterize falls from ADLs. Results indicated that backward falls were characterized by a simultaneous occurrence of a slight increase in trunk extension angle (average peak = 11°) and a dramatic increase in extension angular velocity (average peak = 139.7°/s). It was concluded that trunk angular kinematics could be used to design an effective fall detector.

scholarly journals Trunk Angular Kinematics During Slip-Induced Backward Falls and Activities of Daily Living

2014 ◽  
Vol 136 (10) ◽  
Author(s):  
Jian Liu ◽  
Thurmon E. Lockhart
Keyword(s):  
Activities Of Daily Living ◽  
Daily Living ◽  
Phase Plane ◽  
Fall Detection ◽  
Detection Algorithm ◽  
Simultaneous Occurrence ◽  
Optical Motion ◽  
Motion Features ◽  
Analysis System ◽  
Trunk Extension

Prior to developing any specific fall detection algorithm, it is critical to distinguish the unique motion features associated with fall accidents. The current study aimed to investigate the upper trunk angular kinematics during slip-induced backward falls and activities of daily living (ADLs). Ten healthy older adults (age = 75 ± 6 yr (mean ± SD)) were involved in a laboratory study. Sagittal trunk angular kinematics were measured using optical motion analysis system during normal walking, slip-induced backward falls, lying down, bending over, and various types of sitting down (SN). Trunk angular phase-plane plots were generated to reveal the motion features of falls. It was found that backward falls were characterized by a simultaneous occurrence of a slight trunk extension and an extremely high trunk extension velocity (peak average = 139.7 deg/s), as compared to ADLs (peak average = 84.1 deg/s). It was concluded that the trunk extension angular kinematics of falls were clearly distinguishable from those of ADLs from the perspective of angular phase-plane plot. Such motion features can be utilized in future studies to develop a new prior-to-impact fall detection algorithm.

Study on Motion Measurement of Human Upper Limb Based on Electromagnetic Tracking System during the Activities of Daily Living

2013 ◽  
Vol 321-324 ◽  
pp. 684-687 ◽  
Author(s):  
Hai Yan Song ◽  
Jian Guo Zhang ◽  
Fang Wang
Keyword(s):  
Activities Of Daily Living ◽  
Upper Limb ◽  
Daily Living ◽  
Tracking System ◽  
Human Motion ◽  
Electromagnetic Tracking ◽  
Chinese Adult ◽  
Analysis System ◽  
Electromagnetic Tracking System ◽  
Human Upper Limb

The measurement and analysis of human motion during the Activities of Daily Living (ADLs) is widely used in rehabilitation, ergonomics, diagnosis, and bionics etc. By using American PolhemusTMelectromagnetic tracking system, the human upper limb motions of 6 objects performing 12 basic actions of ADLs were measured. Then the joint angle ranges of human upper limb were obtained by upper limb motion analysis system developed by ourselves. The results can provide reference for complete, standardized Chinese adult human upper limb kinematics parameters.

scholarly journals New method for detection of complex 3D fracture motion - Verification of an optical motion analysis system for biomechanical studies

2012 ◽  
Vol 13 (1) ◽  
Author(s):  
Stefan Doebele ◽  
Sebastian Siebenlist ◽  
Helen Vester ◽  
Petra Wolf ◽  
Ulrich Hagn ◽  
...  
Keyword(s):  
Motion Analysis ◽  
New Method ◽  
Motion Analysis System ◽  
Optical Motion ◽  
Analysis System ◽  
Fracture Motion

Knee Angle Analysis Using a Wearable Motion Analysis System for Detection and Rehabilitation of Mild Traumatic Brain Injury

2013 ◽  
Author(s):  
Amanda L. Martori ◽  
Stephanie L. Carey ◽  
Derek J. Lura ◽  
Rajiv V. Dubey
Keyword(s):  
Motion Analysis ◽  
Brain Injuries ◽  
Wearable Sensors ◽  
Motion Analysis System ◽  
Laboratory Setting ◽  
Gait Parameters ◽  
Optical Motion ◽  
Football Field ◽  
Analysis System ◽  
Optical Motion Capture

Mild traumatic brain injuries (mTBI) are common in soldiers and athletes, and can affect many areas of a person’s daily life including gait [1]. Current methods of measuring gait parameters involve expensive optical motion capture systems, time intensive setup, wires, complicated filtering techniques, and a laboratory setting. A wearable and wireless motion analysis system would allow gait analysis to be performed outside of a laboratory setting during activities of daily living, in a clinical setting or on a football field. The purpose of this study was to develop and verify an algorithm to calculate knee flexion during slow gait, particularly during terminal stance and pre-swing phases, using wireless wearable sensors.

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