Dog Gait Analysis Using the Center of Pressure

2007 ◽  
Author(s):  
Dan B. Marghitu ◽  
Janet Steiss ◽  
Eliza Banu ◽  
Victoria Light
Keyword(s):  
Early Detection ◽  
Gait Analysis ◽  
Center Of Pressure ◽  
Motion Analysis System ◽  
Kinematic Data ◽  
Abnormal Gait ◽  
Healthy Dogs ◽  
Mathematical Techniques ◽  
Analysis System ◽  
Insight Into

In this study we evaluate the applicability of nonlinear mathematical techniques to describe and define normal dog gait. A commercially available walkway 2-dimensional motion analysis system was utilized to acquire kinematic data from healthy dogs. The kinematic data of the center of pressure (COP) of the dog during walking were analyzed. The ability to analyze COP on individual dogs has the potential to provide insight into normal and abnormal gait in dogs, and early detection of subtle lameness. This is especially important in working and athletic dogs.

Biomechanical Analysis on the Foot under Normal and Abnormal Gait for Orthotics Design

2007 ◽  
Vol 353-358 ◽  
pp. 2179-2182 ◽  
Author(s):  
Jae Ok Lee ◽  
Young Shin Lee ◽  
Se Hoon Lee ◽  
Young Jin Choi ◽  
Soung Ha Park
Keyword(s):  
Gait Analysis ◽  
Human Body ◽  
Center Of Pressure ◽  
Reaction Force ◽  
The Body ◽  
Biomechanical Analysis ◽  
Gait Characteristics ◽  
Abnormal Gait ◽  
Experimental Apparatus ◽  
Analysis System

The foot plays an important role in supporting the body and keeping body balance. An abnormal walking habit breaks the balance of the human body as well as the function of the foot. The foot orthotics which is designed to consider biomechanics effectively distributes the load of the human body on the sole of the foot. In this paper, gait analysis is performed for subjects wearing the orthotics. In this study, three male subjects were selected. The experimental apparatus consists of a plantar pressure analysis system and digital EMG system. The gait characteristics are simulated by ADAMS/LifeMOD. The COP (Center of Pressure), EMG and ground reaction force were investigated. As a result of gait analysis, the path of COP was improved and muscle activities were decreased with orthotics on the abnormal walking subjects.

scholarly journals Development of the 4D Gait Analysis System with the Locus of Center of Pressure on Sole of Foot

2010 ◽  
Vol 12 (4) ◽  
pp. 527-531
Author(s):  
Hideo Kawakami ◽  
Nobuhiko Sugano ◽  
Hidenobu Miki ◽  
Kazuo Yonenobu ◽  
Asaki Hattori ◽  
...  
Keyword(s):  
Gait Analysis ◽  
Center Of Pressure ◽  
Analysis System

POSTURE CONTROL AND BALANCE DURING TAI CHI CHUAN PUSH HANDS MOVEMENTS IN A FIXED STANCE

2012 ◽  
Vol 12 (05) ◽  
pp. 1250030 ◽  
Author(s):  
LIN-HWA WANG ◽  
KUO-CHENG LO ◽  
FONG-CHIN SU
Keyword(s):  
Tai Chi ◽  
Center Of Pressure ◽  
Center Of Mass ◽  
Reaction Force ◽  
Whole Body ◽  
Expert Group ◽  
Tai Chi Chuan ◽  
Kinematic Data ◽  
Analysis System ◽  
Force Data

The present study investigated the adequacy of the interaction between the center of mass (COM) and the center of pressure (COP) for maintaining dynamic stability during Tai Chi Chuan (TCC) Push Hands movements in a fixed stance. The COM of the whole body and COP were calculated. Four TCC experts, with 10.3 ± 1.7 years' experience in the Push Hands technique, and 4 TCC beginners, with 2.5 ± 1.3 years' Push Hands experience, were recruited. An Expert Vision Eagle motion analysis system collected kinematic data and 4 Kistler force plates collected the ground reaction force data. The expert group of TCC practitioners showed a significantly more vertical (P = 0.001) direction in the neutralizing circle, and significantly larger values for anterior–posterior (A–P) (P = 0.006) and vertical (P = 0.0004) displacement in the enticing circle, than the beginner group. Compared with the beginner group, the expert group demonstrated significantly greater velocity A–P (P = 0.001) and vertical (P = 0.001) COM displacements in the enticing circle. A significant extent main effect (P = 0.0028) was observed for the COPA–P excursion between the expert and beginner groups during Push Hands movements. The greater A–P force generated by both groups during the initiation of the Push Hands cycle probably reflects the more rapid and forward-oriented nature of this movement. The TCC beginners might have difficulties with movement transfers because of disruptions in the temporal sequencing of the forces. Overall, results indicated that the initial experience-related differences in COM transfers are reflected in the Push Hands movement cycle.

Concurrent validity of observational gait analysis using the vicon motion analysis system

1996 ◽  
Vol 4 (2) ◽  
pp. 167-168 ◽  
Author(s):  
MB Greenberg ◽  
JA Gronley ◽  
J Perry ◽  
R Lawthwaite
Keyword(s):  
Gait Analysis ◽  
Motion Analysis ◽  
Concurrent Validity ◽  
Motion Analysis System ◽  
Analysis System

The Stance Phase of Walking During Late Pregnancy

2005 ◽  
Vol 95 (3) ◽  
pp. 247-253 ◽  
Author(s):  
Janelle K. Lymbery ◽  
Wendy Gilleard
Keyword(s):  
Ground Reaction Force ◽  
Stance Phase ◽  
Center Of Pressure ◽  
Reaction Force ◽  
Late Pregnancy ◽  
Camera Motion ◽  
Motion Analysis System ◽  
Step Width ◽  
Analysis System ◽  
Camera Motion Analysis

The purpose of this study was to investigate temporospatial and ground reaction force variables in the stance phase of walking during late pregnancy. An eight-camera motion-analysis system was used to record 13 pregnant women at 38 weeks’ gestation and again 8 weeks after birth. In late pregnancy, there was a wider step width, and mediolateral ground reaction force tended to be increased in a medial direction. The center of pressure moved more medially initially and less anteriorly at 100% of stance in late pregnancy. The differences suggest that women may adapt their gait to maximize stability in the stance phase of walking and to control mediolateral motion. (J Am Podiatr Med Assoc 95(3): 247–253, 2005)

FEASIBILITY OF ESTIMATING JOINT MOMENTS DURING GAIT WITH ONLY KINEMATIC DATA

2002 ◽  
Vol 02 (02) ◽  
pp. 131-145 ◽  
Author(s):  
HARUHIKO SATO ◽  
PAUL D. ANDREW
Keyword(s):  
Gait Analysis ◽  
Center Of Mass ◽  
Force Plate ◽  
Upper Body ◽  
Vertical Force ◽  
Joint Moments ◽  
Kinematic Data ◽  
Reaction Forces ◽  
Pathological Gait ◽  
Analysis System

A preliminary model is presented for estimating floor reaction forces during human walking based only on kinematic data. Such a model would be useful for supplementing purely qualitative gait analysis performed in clinics where force plates would be an unaffordable luxury, but not for situations in which quantitative data would be used in making such decisions as how to perform an orthopedic surgery. In this model, the vertical components of floor reaction forces are determined by conventional double differentiation of kinematic data, but the horizontal (fore-aft) components are based instead on constraints in which the floor reaction forces are characterized as acting through the center of mass of the upper body. To assess the accuracy of our calculations, we gathered data of gait by a healthy 22-year-old woman using a motion analysis system with force plates. Pathological gait data were also examined. Joint moments were computed from both force plate data and from our estimates of floor reaction forces. Prediction of vertical force showed higher reliability than prediction of fore-aft force. Joint moments from kinematics were successfully calculated in normal gait, but not in pathological gait, especially at the hip joint. The proposed approach may have some merit for performing a gait analysis even when no force plate is present, but the inaccuracy increases in the case of a subject whose upper body sways during gait.

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