Postural Control Profiles of Typically Developing Children From 6 to 12 Years old: An Approach Using Self-Organizing Maps

2020 ◽  
Vol 8 (1) ◽  
pp. 52-66 ◽  
Author(s):  
Xavier García-Massó ◽  
Isaac Estevan ◽  
Roberto Izquierdo-Herrera ◽  
Israel Villarrasa-Sapiña ◽  
Luis-Millan Gonzalez
Keyword(s):  
Postural Control ◽  
Visual Information ◽  
High Stability ◽  
Center Of Pressure ◽  
Standing Position ◽  
Self Organizing Map ◽  
Typically Developing ◽  
Typically Developing Children ◽  
Time Frequency ◽  
Self Organizing

The purposes of the present study were a) to establish postural control profiles for individuals 6–12 years of age, b) to analyze the participants’ characteristics (age, sex, weight, height, and physical activity) in those profiles, and c) to analyze the influence of visual information in the profiles found. Two hundred and eight typically developing children aged 6–12 years performed two trials in bipedal standing position with eyes open and closed. Feature extraction involved time, frequency, and sway-density plot variables using signals from the center of pressure. A Self-Organizing Map was used to classify and visualize the values of the participants in all the postural control variables tested. A k-means cluster analysis was applied to generate a small number of postural control profiles. The results determined six postural control profiles; three with participants denoting high stability and three considered as low stability profiles. Age, sex, and height were related to the postural control profiles. Boys were more frequently allocated in high stability clusters than girls, while the other factors yielded unclear difference between high and low stability profiles. The analysis of children’s profiles reflecting postural stability should therefore involve more than one factor including the individuals’ age, sex, and height.

scholarly journals Effects of Task Constraints on Kinematic Characteristics of Body Segments in Children with Cerebral Palsy and Children with Typical Development during Hand-Reaching

2021 ◽  
Vol 11 (23) ◽  
pp. 11140
Author(s):  
Yun-Huei Ju ◽  
Rong-Ju Cherng
Keyword(s):  
Cerebral Palsy ◽  
Postural Control ◽  
Task Demands ◽  
Typical Development ◽  
Typically Developing ◽  
Typically Developing Children ◽  
Cross Sectional ◽  
Postural Alignment ◽  
Reaching Tasks ◽  
Children With Cerebral Palsy

Background: Children with cerebral palsy (CP) have difficulty in managing postural control during functional reaching tasks, although children with different postural control ability are able to come up with different motor solutions to cope with different task demands. This study examined the effect of task constraint on postural control performance in children with cerebral palsy and typical development (TD) in terms of different postural control abilities. Methods: A cross-sectional research design was used. Twelve children with spastic diplegic cerebral palsy (mean age: 107.8 months) and 16 typically developing children (mean age: 110.9 months) participated in this study. Individually, all subjects were seated in a height-adjusted chair and were requested to reach for target(s) located at three different directions (medial, anterior, and lateral). A six-camera Qualisys Motion Capture System was used to capture motion data. Kinematic data in terms of body alignment and angular changes were analyzed. Results: Children with cerebral palsy demonstrated different postural control strategies to complete different reaching tasks compared to typically developing children by preparing postural alignment in advance, coordinating different body orientation movements during reaching after showing difficulty in managing reach medially. Conclusions: Children with cerebral palsy perceive their insufficient ability and prepare their alignment in advance to adapt to the task demanded and decrease the postural challenges of the task. Even though children with cerebral palsy self-generate different motor solutions to reach without falling, these alternative strategies might not be the most efficient adaptation.

Effects of a Dance Program on Static Balance on a Platform in Young Adults With Down Syndrome

2016 ◽  
Vol 33 (3) ◽  
pp. 233-252 ◽  
Author(s):  
Lourdes Gutiérrez-Vilahú ◽  
Núria Massó-Ortigosa ◽  
Lluís Costa-Tutusaus ◽  
Miriam Guerra-Balic ◽  
Ferran Rey-Abella
Keyword(s):  
Young Adults ◽  
Down Syndrome ◽  
Young People ◽  
Training Program ◽  
Visual Information ◽  
Center Of Pressure ◽  
Standing Position ◽  
Static Balance ◽  
Eyes Closed ◽  
Before And After

The purpose of the study was to compare postural control in static standing in young adults with and without Down syndrome (DS), with eyes closed and eyesopen, before and after an 18-wk dance-based training program. The study included 11 young people with DS age 20.5 (1.3) yr and 11 without DS age 20.2 (2.0) yr.All parameters were recorded before and after the training program. Parameters related to center of pressure (COP; closed and open eyes) were recorded from aplatform with the participant in bipedal standing position during 30 s. The results suggest that young people with DS have worse COP control in both visual conditions (closed and open eyes) and are affected by visual information in a different way than their peers without DS. In the group of young adults with DS, thedance-based training program improved some parameters related to the use of visual input in controlling COP.

scholarly journals The Effect of Performing a Dual Task on Postural Control in Children with Autism

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Maria Pia Bucci ◽  
Catherine Doyen ◽  
Yves Contenjean ◽  
Kelley Kaye
Keyword(s):  
Eye Movements ◽  
Dual Task ◽  
Postural Stability ◽  
Center Of Pressure ◽  
Children With Autism ◽  
Typically Developing ◽  
Typically Developing Children ◽  
Dual Task Condition ◽  
Pursuit Eye Movements ◽  
Task Conditions

The aim of the study was to explore the effect of eye movements (saccades and pursuits) on postural stability in children with autism versus typically developing children of comparable age. Postural stability was recorded with a platform (Techno Concept) in seven children with autism (mean age: 6 ± 0.8) while fixating a target or making saccades or pursuit eye movements. Data was compared to that of seven age-matched typically developing children. Surface area and mean speed of the center of pressure (CoP) were measured. Autistic children (AC) were more instable than typically developing children (TD), both in simple as well as dual task conditions. Performing a dual task thus affects AC and TD children in a different way. AC stability is not improved during saccades or pursuit eye movements in the dual task condition; in contrast, saccades significantly improve postural stability in TD children. The postural instability observed in AC during simple as well as dual task supports the hypothesis that such children have deficits in cerebellar functions.

scholarly journals Development of postural control during gait in typically developing children: The effects of dual-task conditions

2012 ◽  
Vol 35 (3) ◽  
pp. 428-434 ◽  
Author(s):  
Sujitra Boonyong ◽  
Ka-Chun Siu ◽  
Paul van Donkelaar ◽  
Li-Shan Chou ◽  
Marjorie H. Woollacott
Keyword(s):  
Postural Control ◽  
Dual Task ◽  
Typically Developing ◽  
Typically Developing Children ◽  
Task Conditions

Exploring the multiscale changeability of precipitation using the entropy concept and self-organizing maps

2019 ◽  
Vol 11 (3) ◽  
pp. 655-676
Author(s):  
Kiyoumars Roushangar ◽  
Farhad Alizadeh ◽  
Jan Adamowski ◽  
Seyed Mehdi Saghebian
Keyword(s):  
Time Series ◽  
Annual Precipitation ◽  
Optimum Number ◽  
Self Organizing Map ◽  
Self Organizing Maps ◽  
Time Frequency ◽  
Modes Of Variability ◽  
Rain Gauges ◽  
Spatio Temporal ◽  
Self Organizing

Abstract This study utilized a spatio-temporal framework to assess the dispersion and uncertainty of precipitation in Iran. Thirty-one rain gauges with data from 1960 to 2010 were selected in order to apply the entropy concept and study spatio-temporal variability of precipitation. The variability of monthly, seasonal and annual precipitation series was studied using the marginal disorder index (MDI). To investigate the intra-annual and decadal distribution of monthly and annual precipitation values, the apportionment disorder index (ADI) and decadal ADI (DADI) were applied to the time series. The continuous wavelet transform was used to decompose the ADI time series into time-frequency domains. The decomposition of the ADI series into different zones helped to identify the dominant modes of variability and the variation of those modes over time. The results revealed the high disorderliness in the amount of precipitation for different temporal scales based on disorder indices. Based on the DI outcome for all rain gauges, a self-organizing map (SOM) was trained to find the optimum number of clusters (seven) of rain gauges. It was observed from the clustering that there was hydrologic similarity in the clusters apart from the geographic neighborhood.

scholarly journals Displacement of Centre of Pressure during Rehabilitation Exercise in Adolescent Idiopathic Scoliosis Patients

2021 ◽  
Vol 10 (13) ◽  
pp. 2837
Author(s):  
Luca Marin ◽  
Adam Kawczyński ◽  
Vittoria Carnevale Pellino ◽  
Massimiliano Febbi ◽  
Dario Silvestri ◽  
...  
Keyword(s):  
Motor Control ◽  
Adolescent Idiopathic Scoliosis ◽  
Idiopathic Scoliosis ◽  
Postural Control ◽  
Center Of Pressure ◽  
Daily Life ◽  
Standing Position ◽  
The Self ◽  
Centre Of Pressure ◽  
Rehabilitation Exercise

Background. Adolescent idiopathic scoliosis (AIS) is included into the category of pathologies that could affect postural control. Rarely AIS shows symptoms but often compromises the normal positioning of the head, trunk and, more generally, of the limbs in the space. We used a stabilometric platform to evaluate the motor control outcomes during a self-elongation in girls with AIS. Methods. In 10 girls with AIS, we evaluated the center of pressure (COP) modifications on a baropodometric platform in a standing position and after a self-elongation correction. Results. All the outcomes (except the eccentricity) showed an increasement during the self-elongation exercise even if the significant differences were not found. Conclusion. SE correction contributes to ameliorate the COP symmetry with a better repercussion on the balance management. This highlights the importance of repetitions during all activities of daily life.

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