scholarly journals CLASSIFICATION OF SAGITTAL PLANE POSTURE DISORDERS AS EVIDENCED BY COMPUTER OPTICAL TOPOGRAPHY

2011 ◽  
pp. 46-55
Author(s):  
Vladimir Sarnadsky ◽  
Keyword(s):  
Sagittal Plane ◽  
Optical Topography

Rule-based algorithm for the classification of sitting postures in the sagittal plane from the Cardiff Body Match measurement system

2013 ◽  
Vol 38 (1) ◽  
pp. 5-15 ◽  
Author(s):  
Janusz Kulon ◽  
Adam Partlow ◽  
Colin Gibson ◽  
Ian Wilson ◽  
Steven Wilcox
Keyword(s):  
Measurement System ◽  
Sagittal Plane ◽  
Rule Based

scholarly journals Analisis of posture in school-age children according to optical topography

2019 ◽  
Vol 26 (4) ◽  
pp. 43-45
Author(s):  
N. R Nigamadyanov ◽  
M. B Tsykunov ◽  
G. E Ivanova ◽  
V. I Lukyanov
Keyword(s):  
School Children ◽  
School Age Children ◽  
School Age ◽  
Common Condition ◽  
Screening Examination ◽  
Highly Effective ◽  
Optical Topography ◽  
Screening Diagnostics

Purpose of study: the study of posture in school children in three planes according to computer optical topography. Patients and methods. A screening examination of 1835 children was performed using computer optical topography of the back, the average age was 11.2±1.7 years, girls 930 (50.6%), boys 905 (49.3%). Results and conclusion. The study showed that computer optical topography is a highly effective method for screening diagnostics of posture disorders in school children, posture disorders are a common condition, according to the topographic classification of posture disorders, occur in 69.46% of school age children.

scholarly journals A Practical Sensor-Based Methodology for the Quantitative Assessment and Classification of Chronic Non Specific Low Back Patients (NSLBP) in Clinical Settings

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2902 ◽  
Author(s):  
Mehrdad Davoudi ◽  
Seyyed Mohammadreza Shokouhyan ◽  
Mohsen Abedi ◽  
Narges Meftahi ◽  
Atefeh Rahimi ◽  
...  
Keyword(s):  
High Risk ◽  
Sagittal Plane ◽  
Inertial Sensor ◽  
Patient Specific ◽  
Clinical Settings ◽  
Low Back ◽  
Linear Discriminant ◽  
Significant Difference ◽  
The Right

The successful clinical application of patient-specific personalized medicine for the management of low back patients remains elusive. This study aimed to classify chronic nonspecific low back pain (NSLBP) patients using our previously developed and validated wearable inertial sensor (SHARIF-HMIS) for the assessment of trunk kinematic parameters. One hundred NSLBP patients consented to perform repetitive flexural movements in five different planes of motion (PLM): 0° in the sagittal plane, as well as 15° and 30° lateral rotation to the right and left, respectively. They were divided into three subgroups based on the STarT Back Screening Tool. The sensor was placed on the trunk of each patient. An ANOVA mixed model was conducted on the maximum and average angular velocity, linear acceleration and maximum jerk, respectively. The effect of the three-way interaction of Subgroup by direction by PLM on the mean trunk acceleration was significant. Subgrouping by STarT had no main effect on the kinematic indices in the sagittal plane, although significant effects were observed in the asymmetric directions. A significant difference was also identified during pre-rotation in the transverse plane, where the velocity and acceleration decreased while the jerk increased with increasing asymmetry. The acceleration during trunk flexion was significantly higher than that during extension, in contrast to the velocity, which was higher in extension. A Linear Discriminant Analysis, utilized for classification purposes, demonstrated that 51% of the total performance classifying the three STarT subgroups (65% for high risk) occurred at a position of 15° of rotation to the right during extension. Greater discrimination (67%) was obtained in the classification of the high risk vs. low-medium risk. This study provided a smart “sensor-based” practical methodology for quantitatively assessing and classifying NSLBP patients in clinical settings. The outcomes may also be utilized by leveraging cost-effective inertial sensors, already available in today’s smartphones, as objective tools for various health applications towards personalized precision medicine.

Serial measurement of calcaneal pitch during midstance

1999 ◽  
Vol 89 (4) ◽  
pp. 188-193 ◽  
Author(s):  
SC Wearing ◽  
S Urry ◽  
PR Perlman ◽  
P Dubois ◽  
JE Smeathers
Keyword(s):  
Repeated Measures ◽  
Sagittal Plane ◽  
Plane Motion ◽  
Arch Height ◽  
Height Ratio ◽  
Radiographic Images ◽  
Serial Measurement ◽  
Repeated Measures Analysis ◽  
Foot Function

Although emerging evidence suggests a causal relationship between arch structure and musculoskeletal injury, few investigations have adequately assessed arch function during gait. In this study, digitized videofluoroscopy was used to evaluate the sagittal plane motion of the calcaneus during gait. Nine female subjects requiring diagnostic foot radiographs underwent videofluoroscopy. The calcaneal inclination angle, arch height ratio, and tarsal index were digitally analyzed for all radiographic images. Calcaneal pitch was correlated to both the arch height ratio and the tarsal index. Repeated measures analysis of variance helped to identify a significant reduction in the mean calcaneal pitch during the midstance and early propulsive periods of gait. These findings suggest that although calcaneal pitch may be used as an indicator of rearfoot position, biomechanical classification of foot types based on radiographs may result in erroneous conclusions concerning foot function.

scholarly journals BIOMECHANICAL ASSESSMENT OF SPINE DEFORMITIES IN BEKHTEREV’S DISEASE

2005 ◽  
pp. 040-049
Author(s):  
Aleksandr Vjacheslavovich Gladkov ◽  
Viktor Viktorovich Rerikh
Keyword(s):  
Sagittal Plane ◽  
Deformity Correction ◽  
Flexion Deformity ◽  
Biomechanical Assessment ◽  
Spine Shape ◽  
Spine Deformities ◽  
Before And After ◽  
Orthostatic Position ◽  
Lumbar Kyphosis

Objective. To analyze the dependence of the spine shape and orientation in a sagittal plane on localization of a flexion deformity associated with Bekhterev’s disease, and the outcomes of surgical deformity correction. Material and Methods. The kinematic analysis of sagittal plane spondylograms of 44 patients (43 men and 1 woman, aged 21 to 49 years) with Bekhterev’s disease before and after surgery was performed basing on author’s classification of kyphotic deformities. Illness duration was 7 to 22 years. Results. One-level correction vertebrectomy caused the increase of lordosis at two or three levels in 50 % of cases. Correction vertebrectomy for flat lumbar kyphosis resulted in normalization of all biomechanical spine parameters characterizing its shape and sagittal orientation in 100 % of cases. Lumbar vertebrectomy for flexion deformity in the thoracic spine normalized sagittal position of vertebrae only in isolated segments. Cosmetic hyperkyphosis remained, though the trunk orthostatic position had been restored. Similar results were recorded in the group with multilevel deformities. Lost of correction at vertebrectomy level and progression of flexible deformity above vertebrectomy were not revealed. Kyphotic deformity formation (ranged 16.0° to 32.0°) at the segments caudal to vertebrectomy was observed in 10 % of cases. Conclusion. Flexion deformity localization in the spine determines the condition of its further progression in many respects. Correction lumbar vertebrectomy while reconstructing orthostatic trunk position does not always result in complete normalization of vertebra sagittal position in anchylosis spine.

Preliminary proposal for surgical classification of sacral tumors

2010 ◽  
Vol 13 (5) ◽  
pp. 651-658 ◽  
Author(s):  
Zhiyu Zhang ◽  
Yingqi Hua ◽  
Guodong Li ◽  
Wei Sun ◽  
Shuo Hu ◽  
...  
Keyword(s):  
Surgical Approach ◽  
Sagittal Plane ◽  
Tumor Resection ◽  
Classification Method ◽  
Pelvic Cavity ◽  
Imaging Features ◽  
Cross Sectional ◽  
Anatomical Position ◽  
Sacral Tumors

ObjectThe authors propose a new surgical classification method for sacral tumors that improves the guidance for specific surgical decisions and approaches.MethodsThe authors retrospectively studied the clinical courses of 92 patients with sacral tumors treated at the Changhai Hospital; all patients underwent tumor resection between January 2000 and August 2005. The clinical characteristics, imaging features, and pathological classifications were carefully assessed in each case. The tumors were classified according to the imaging features and intraoperative findings. The surgical approach and the resection area were determined according to the tumor classification.ResultsThe proposed surgical classification system divided the sacral tumors into 2 major types according to the lesion's anatomical position in the sagittal plane. The tumors were further divided into 4 subtypes according to the length of the tumor's anterior protrusion into the pelvic cavity. Finally, each tumor subtype was classified into 16 areas according to the anatomical position in the cross-sectional plane. This classification method was used to categorize the sacral tumors, all of which were totally resected under the naked eye. Postoperatively symptoms were improved to varying degrees.ConclusionsThe appropriate classification of sacral tumors and the selection of a corresponding surgical approach can improve the rate of total resection and the surgical safety, as well as decrease the recurrence rate.

A method for body posture classification of three-dimensional body models in the sagittal plane

2017 ◽  
Vol 89 (2) ◽  
pp. 133-149 ◽  
Author(s):  
Maja Mahnic Naglic ◽  
Slavenka Petrak
Keyword(s):  
Factor Analysis ◽  
Sagittal Plane ◽  
Three Dimensional ◽  
Body Posture ◽  
Anthropometric Measurement ◽  
Locomotor System ◽  
Main Components ◽  
Body Scanner ◽  
Posture Classification

The main purpose of this research was to develop a method for the classification of body posture types, using a three-dimensional body scanner and data on anthropometric measurement. A sample of 102 male test subjects, aged from 20 to 30 years, and without structural deformities of the locomotor system, were scanned. Anthropometric body measurement was performed and 16 measurements were selected to calculate upper and lower body curve angles as a set of posture indicators. The number of maximally different groups of test subjects was determined using k-means cluster analysis and factor analysis of established posture indicators. The sampling into three upper and three lower posture types showed the largest statistically significant differentiation, comparing the results of variance analysis between and within the obtained groups, which confirmed three main components extracted by factor analysis. Discriminant analysis used in order to determine differences between posture types showed which indicators are the most important when classifying test subjects belonging to a particular upper or lower posture type. Classification functions were defined based on discrimination functions and their factor loadings, and used to calculate a matrix of correctly classified test subjects. The classification matrix showed very high prediction possibility of established posture indicators and the proposed method for body posture classification.

ON SOME ASPECTS OF HUMANOID ROBOTS GAIT SYNTHESIS AND CONTROL AT SMALL DISTURBANCES

2008 ◽  
Vol 05 (01) ◽  
pp. 119-156 ◽  
Author(s):  
MIOMIR VUKOBRATOVIĆ ◽  
BRANISLAV BOROVAC ◽  
MIRKO RAKOVIĆ ◽  
VELJKO POTKONJAK ◽  
MOMČILO MILINOVIĆ
Keyword(s):  
Sagittal Plane ◽  
Ground Surface ◽  
Decisive Role ◽  
Humanoid Robots ◽  
Human Gait ◽  
Reference Motion ◽  
Gait Synthesis ◽  
And Control ◽  
Small Disturbances

This work considers some aspects of the problem of generating and preserving of two-legged gait bearing in mind the requirements for a higher degree of similarity with human gait (anthropomorphism) and robustness to the constantly present small disturbances during the walk. Reference motion was synthesized by semi-inverse method, varying the mode of ZMP traveling along a path selected in advance on the foot–ground surface. It was found that different ways of ZMP motion along the path has a decisive role in the trunk deflection in the sagittal plane. Also, the problem of classification of disturbances and their compensation during the gait is discussed in detail. The significance of the multi-link trunk in the gait synthesis and its role in the compensation of disturbances is also considered.

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