Publication date: Available online 25 September 2016
Source:Gait & Posture
Author(s): Joel L. Lanovaz, Alison R. Oates, Tanner T. Treen, Janelle Unger, Kristin E. Musselman
Although inertial sensor systems are becoming a popular tool for gait analysis in both healthy and pathological adult populations, there are currently no data on the validity of these systems for use with children. The purpose of this study was to validate spatiotemporal data from a commercial inertial sensor system (MobilityLab) in typically-developing children. Data from 10 children (5 males; 3.0 − 8.3 years, mean=5.1) were collected simultaneously from MobilityLab and 3D motion capture during gait at self-selected and fast walking speeds. Spatiotemporal parameters were compared between the two methods using a Bland-Altman method. The results indicate that, while the temporal gait measurements were similar between the two systems, MobilityLab demonstrated a consistent bias with respect to measurement of the spatial data (stride length). This error is likely due to differences in relative leg length and gait characteristics in children compared to the MobilityLab adult reference population used to develop the stride length algorithm. A regression-based equation was developed based on the current data to correct the MobilityLab stride length output. The correction was based on leg length, stride time, and shank range-of-motion, each of which were independently associated with stride length. Once the correction was applied, all of the spatiotemporal parameters evaluated showed good agreement. The results of this study indicate that MobilityLab is a valid tool for gait analysis in typically-developing children. Further research is needed to determine the efficacy of this system for use in children suffering from pathologies that impact gait mechanics.
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Δευτέρα 26 Σεπτεμβρίου 2016
Validation of a commercial inertial sensor system for spatiotemporal gait measurements in children
Publication date: Available online 25 September 2016
Source:Gait & Posture
Author(s): Joel L. Lanovaz, Alison R. Oates, Tanner T. Treen, Janelle Unger, Kristin E. Musselman
Although inertial sensor systems are becoming a popular tool for gait analysis in both healthy and pathological adult populations, there are currently no data on the validity of these systems for use with children. The purpose of this study was to validate spatiotemporal data from a commercial inertial sensor system (MobilityLab) in typically-developing children. Data from 10 children (5 males; 3.0 − 8.3 years, mean=5.1) were collected simultaneously from MobilityLab and 3D motion capture during gait at self-selected and fast walking speeds. Spatiotemporal parameters were compared between the two methods using a Bland-Altman method. The results indicate that, while the temporal gait measurements were similar between the two systems, MobilityLab demonstrated a consistent bias with respect to measurement of the spatial data (stride length). This error is likely due to differences in relative leg length and gait characteristics in children compared to the MobilityLab adult reference population used to develop the stride length algorithm. A regression-based equation was developed based on the current data to correct the MobilityLab stride length output. The correction was based on leg length, stride time, and shank range-of-motion, each of which were independently associated with stride length. Once the correction was applied, all of the spatiotemporal parameters evaluated showed good agreement. The results of this study indicate that MobilityLab is a valid tool for gait analysis in typically-developing children. Further research is needed to determine the efficacy of this system for use in children suffering from pathologies that impact gait mechanics.
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Source:Gait & Posture
Author(s): Joel L. Lanovaz, Alison R. Oates, Tanner T. Treen, Janelle Unger, Kristin E. Musselman
Although inertial sensor systems are becoming a popular tool for gait analysis in both healthy and pathological adult populations, there are currently no data on the validity of these systems for use with children. The purpose of this study was to validate spatiotemporal data from a commercial inertial sensor system (MobilityLab) in typically-developing children. Data from 10 children (5 males; 3.0 − 8.3 years, mean=5.1) were collected simultaneously from MobilityLab and 3D motion capture during gait at self-selected and fast walking speeds. Spatiotemporal parameters were compared between the two methods using a Bland-Altman method. The results indicate that, while the temporal gait measurements were similar between the two systems, MobilityLab demonstrated a consistent bias with respect to measurement of the spatial data (stride length). This error is likely due to differences in relative leg length and gait characteristics in children compared to the MobilityLab adult reference population used to develop the stride length algorithm. A regression-based equation was developed based on the current data to correct the MobilityLab stride length output. The correction was based on leg length, stride time, and shank range-of-motion, each of which were independently associated with stride length. Once the correction was applied, all of the spatiotemporal parameters evaluated showed good agreement. The results of this study indicate that MobilityLab is a valid tool for gait analysis in typically-developing children. Further research is needed to determine the efficacy of this system for use in children suffering from pathologies that impact gait mechanics.
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Validation of a commercial inertial sensor system for spatiotemporal gait measurements in children
Publication date: Available online 25 September 2016
Source:Gait & Posture
Author(s): Joel L. Lanovaz, Alison R. Oates, Tanner T. Treen, Janelle Unger, Kristin E. Musselman
Although inertial sensor systems are becoming a popular tool for gait analysis in both healthy and pathological adult populations, there are currently no data on the validity of these systems for use with children. The purpose of this study was to validate spatiotemporal data from a commercial inertial sensor system (MobilityLab) in typically-developing children. Data from 10 children (5 males; 3.0 − 8.3 years, mean=5.1) were collected simultaneously from MobilityLab and 3D motion capture during gait at self-selected and fast walking speeds. Spatiotemporal parameters were compared between the two methods using a Bland-Altman method. The results indicate that, while the temporal gait measurements were similar between the two systems, MobilityLab demonstrated a consistent bias with respect to measurement of the spatial data (stride length). This error is likely due to differences in relative leg length and gait characteristics in children compared to the MobilityLab adult reference population used to develop the stride length algorithm. A regression-based equation was developed based on the current data to correct the MobilityLab stride length output. The correction was based on leg length, stride time, and shank range-of-motion, each of which were independently associated with stride length. Once the correction was applied, all of the spatiotemporal parameters evaluated showed good agreement. The results of this study indicate that MobilityLab is a valid tool for gait analysis in typically-developing children. Further research is needed to determine the efficacy of this system for use in children suffering from pathologies that impact gait mechanics.
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Source:Gait & Posture
Author(s): Joel L. Lanovaz, Alison R. Oates, Tanner T. Treen, Janelle Unger, Kristin E. Musselman
Although inertial sensor systems are becoming a popular tool for gait analysis in both healthy and pathological adult populations, there are currently no data on the validity of these systems for use with children. The purpose of this study was to validate spatiotemporal data from a commercial inertial sensor system (MobilityLab) in typically-developing children. Data from 10 children (5 males; 3.0 − 8.3 years, mean=5.1) were collected simultaneously from MobilityLab and 3D motion capture during gait at self-selected and fast walking speeds. Spatiotemporal parameters were compared between the two methods using a Bland-Altman method. The results indicate that, while the temporal gait measurements were similar between the two systems, MobilityLab demonstrated a consistent bias with respect to measurement of the spatial data (stride length). This error is likely due to differences in relative leg length and gait characteristics in children compared to the MobilityLab adult reference population used to develop the stride length algorithm. A regression-based equation was developed based on the current data to correct the MobilityLab stride length output. The correction was based on leg length, stride time, and shank range-of-motion, each of which were independently associated with stride length. Once the correction was applied, all of the spatiotemporal parameters evaluated showed good agreement. The results of this study indicate that MobilityLab is a valid tool for gait analysis in typically-developing children. Further research is needed to determine the efficacy of this system for use in children suffering from pathologies that impact gait mechanics.
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Preterm, low-birth-weight babies more likely for women with hearing loss
Hearing loss may increase a woman's risk of giving birth prematurely or having a baby with a low birth weight, according to a new study.
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Preterm, low-birth-weight babies more likely for women with hearing loss
Hearing loss may increase a woman's risk of giving birth prematurely or having a baby with a low birth weight, according to a new study.
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Preterm, low-birth-weight babies more likely for women with hearing loss
Hearing loss may increase a woman's risk of giving birth prematurely or having a baby with a low birth weight, according to a new study.
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Introducing Celebrate
We are excited to introduce Sonic’s Celebrate family of products. The following video provides an overview. 
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Treatment of Tinnitus Using a Customized, Ultrasonic Acoustic Stimulus Delivered via the HyperSound Audio System
Tinnitus is a condition whereby sound is heard without external acoustic stimulus. It is often described as a constant tone (ringing), hissing, or roaring. Prevalence studies in western Europe and the USA have shown rates as high as 15% in the adult population (Baguley, McFerran, & Hall, 2013) with an estimated 20 million Americans that suffer from tinnitus. Researchers believe there are four primary effects of tinnitus on daily life, including (a) thought and emotions, (b) hearing, (c) sleep, and (d) concentration. It is a significant cause of diminished quality of life as well as depression, anxiety, insomnia, fatigue, and difficulty with concentration. To complicate further, each person is affected differently by tinnitus. The condition can occur from a variety of sources including disease and hearing damage, and can range in intensity from mildly annoying to completely debilitating (Claussen & Pandey, 2009). 
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