Blar i Institutt for nevromedisin og bevegelsesvitenskap på forfatter "Ihlen, Espen Alexander F."
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A physical activity reference data-set recorded from older adults using body-worn inertial sensors and video technology?The ADAPT study data-set
Bourke, Alan; Ihlen, Espen Alexander F.; Bergquist, Ronny; Wik, Per Bendik; Vereijken, Beatrix; Helbostad, Jorunn L. (Journal article; Peer reviewed, 2017)Physical activity monitoring algorithms are often developed using conditions that do not represent real-life activities, not developed using the target population, or not labelled to a high enough resolution to capture the ... -
Association between vestibulo-ocular reflex suppression, balance, gait, and fall risk in ageing and neurodegenerative disease: Protocol of a one-year prospective follow-up study
Srulijes, Karin; Mack, David J; Klenk, Jochen; Schwickert, Lars; Ihlen, Espen Alexander F.; Schwenk, Michael; Lindemann, Ulrich; Meyer, Miriam; KC, Srijana; Hobert, Markus A; Brockmann, Kathrin; Wurster, Isabel; Pomper, Jörn K; Synofzik, Matthis; Schneider, Erich; Ilg, Uwe; Berg, Daniela; Maetzler, Walter; Becker, Clemens (Peer reviewed; Journal article, 2015)Background Falls frequency increases with age and particularly in neurogeriatric cohorts. The interplay between eye movements and locomotion may contribute substantially to the occurrence of falls, but is hardly ... -
Characteristics of general movements in preterm infants assessed by computer-based video analysis
Adde, Lars; yang, hong; Sæther, Rannei; Jensenius, Alexander Refsum; Ihlen, Espen Alexander F.; Cao, Jia-yan; Støen, Ragnhild (Journal article; Peer reviewed, 2017)Background: Previous evidence suggests that the variability of the spatial center of infant movements, calculated by computer-based video analysis software, can identify fidgety general movements (GMs) and predict cerebral ... -
Classical machine learning versus deep learning for the older adults free-living activity classification
Awais, Muhammad; Chiari, Lorenzo; Ihlen, Espen Alexander F.; Helbostad, Jorunn L.; Palmerini, Luca (Peer reviewed; Journal article, 2021)Physical activity has a strong influence on mental and physical health and is essential in healthy ageing and wellbeing for the ever-growing elderly population. Wearable sensors can provide a reliable and economical measure ... -
Development and Validation of a Deep Learning Method to Predict Cerebral Palsy From Spontaneous Movements in Infants at High Risk
Groos, Daniel; Adde, Lars; Aubert, Sindre Aarnes; Boswell, Lynn; De Regnier, Raye-Ann; Fjørtoft, Toril Larsson; Gaebler-Spira, Deborah; Haukeland, Andreas; Loennecken, Marianne; Msall, Michael; Moinichen, Unn Inger; Pascal, Aurelie; Peyton, Colleen; Ramampiaro, Heri; Schreiber, Michael D.; Silberg, Inger Elisabeth; Songstad, Nils Thomas; Thomas, Niranjan; van den Broeck, Christine; Øberg, Gunn Kristin; Ihlen, Espen Alexander F.; Støen, Ragnhild (Peer reviewed; Journal article, 2022)Importance Early identification of cerebral palsy (CP) is important for early intervention, yet expert-based assessments do not permit widespread use, and conventional machine learning alternatives lack validity. Objective ... -
The Discriminant Value of Phase-Dependent Local Dynamic Stability of Daily Life Walking in Older Adult Community-Dwelling Fallers and Nonfallers
Ihlen, Espen Alexander F.; Weiss, A; Helbostad, Jorunn L.; Hausdorff, Jeffrey M (Peer reviewed; Journal article, 2015)The present study compares phase-dependent measures of local dynamic stability of daily life walking with 35 conventional gait features in their ability to discriminate between community-dwelling older fallers and nonfallers. ... -
Effects of Ankle-Foot Orthoses on acceleration and energy cost of walking in children and adolescents with cerebral palsy
Goihl, Tobias; Brændvik, Siri Merete; Ustad, Astrid; Roeleveld, Karin; Ihlen, Espen Alexander F.; Bardal, Ellen Marie (Journal article; Peer reviewed, 2021) -
Exergaming in Older Adults: Movement Characteristics While Playing Stepping Games
Skjæret-Maroni, Nina; Vonstad, Elise; Ihlen, Espen Alexander F.; Tan, Xiang chun; Helbostad, Jorunn L.; Vereijken, Beatrix (Journal article; Peer reviewed, 2016)Despite frequent use of exergames in intervention studies to improve physical function in older adults, we lack knowledge about the movements performed during exergaming. This causes difficulties for interpreting results ... -
The FARSEEING real-world fall repository: a large-scale collaborative database to collect and share sensor signals from real-world falls
Klenk, Jochen; Schwickert, Lars; Palmerini, Luca; Mellone, Sabato; Bourke, Alan; Ihlen, Espen Alexander F.; Kerse, Ngaire; Hauer, Klaus; Pijnappels, Mirjam; Synofzik, Matthis; Srulijes, Karin; Maetzler, Walter; Helbostad, Jorunn L.; Zijlstra, Wiebren; Aminian, Kamiar; Todd, Christopher; Chiari, Lorenzo; Becker, Clemens (Peer reviewed; Journal article, 2016)Background Real-world fall events objectively measured by body-worn sensors can improve the understanding of fall events in older people. However, these events are rare and hence challenging to capture. Therefore, the ... -
Fractional stability of trunk acceleration dynamics of daily-life walking: toward a unified concept of gait stability
Ihlen, Espen Alexander F.; van Schooten, Kimberley S; Bruijn, Sjoerd M; Pijnappels, Mirjam; van Dieen, Jaap H (Journal article; Peer reviewed, 2017)Over the last decades, various measures have been introduced to assess stability during walking. All of these measures assume that gait stability may be equated with exponential stability, where dynamic stability is ... -
Identification of gait domains and key gait variables following hip fracture
Thingstad, Pernille; Egerton, Thorlene; Ihlen, Espen Alexander F.; Taraldsen, Kristin; Moe-Nilssen, Rolf; Helbostad, Jorunn L. (Peer reviewed; Journal article, 2015)Background:Restoration of gait is an important goal of rehabilitation after hip fracture. Numerous spatial andtemporal gait variables have been reported in the literature, but beyond gait speed, there is little agreement ... -
In-Motion-App for remote General Movement Assessment: a multi-site observational study
Adde, Lars; Brown, Annemette; van den Broeck, Christine; DeCoen, Kris; Eriksen, Beate Horsberg; Fjørtoft, Toril Larsson; Groos, Daniel; Ihlen, Espen Alexander F.; Osland, Siril; Pascal, Aurelie; Paulsen, Henriette; Skog, Ole-Morten; Sivertsen, Wiebke; Støen, Ragnhild (Peer reviewed; Journal article, 2021)Objectives: To determine whether videos taken by parents of their infants' spontaneous movements were in accordance with required standards in the In-Motion-App, and whether the videos could be remotely scored by a trained ... -
Introduction to multifractal detrended fluctuation analysis in Matlab
Ihlen, Espen Alexander F. (Journal article; Peer reviewed, 2012)Fractal structures are found in biomedical time series from a wide range of physiological phenomena. The multifractal spectrum identifies the deviations in fractal structure within time periods with large and small ... -
Machine Learning of Infant Spontaneous Movements for the Early Prediction of Cerebral Palsy: A Multi-Site Cohort Study
Ihlen, Espen Alexander F.; Støen, Ragnhild; Boswell, Lynn; de-Regnier, Raye-Ann; Fjørtoft, Toril Larsson; Gaebler-spira, Deborah; Labori, Cathrine; Loennecken, Marianne; Msall, Me; Møinicken, Unn inger; Peyton, Colleen; Schreiber, Me; Silberg, Inger Elisabeth; Songstad, Nils Thomas; Vaagen, Randi; Øberg, Gunn Kristin; Adde, Lars (Journal article; Peer reviewed, 2019)Background: Early identification of cerebral palsy (CP) during infancy will provide opportunities for early therapies and treatments. The aim of the present study was to present a novel machine-learning model, the ... -
Performance analysis in ski jumping with a differential global navigation satellite system and video-based pose estimation
Elfmark, Ola; Ettema, Gertjan; Groos, Daniel; Ihlen, Espen Alexander F.; Velta, Rune; Haugen, Per; Bråten, Steinar; Gilgien, Matthias (Peer reviewed; Journal article, 2021)This study investigated the explanatory power of a sensor fusion of two complementary methods to explain performance and its underlying mechanisms in ski jumping. A differential Global Navigation Satellite System (dGNSS) ... -
Performance Evaluation of State of the Art Systems for Psysical Activity Classification of Older Subjects Using Inertial Sensors in a Real Life Scenario: A Benchmark Study
Awais, Muhammad; Palmerini, Luca; Bourke, Alan; Ihlen, Espen Alexander F.; Helbostad, Jorunn L.; Chiari, Lorenzo (Peer reviewed; Journal article, 2016)The popularity of using wearable inertial sensors for physical activity classification has dramatically increased in the last decade due to their versatility, low form factor, and low power requirements. Consequently, ... -
Predicting Advanced Balance Ability and Mobility with an Instrumented Timed Up and Go Test
Bergquist, Ronny; Nerz, Corinna; Taraldsen, Kristin; Mellone, Sabato; Ihlen, Espen Alexander F.; Vereijken, Beatrix; Helbostad, Jorunn L.; Becker, Clemens; Mikolaizak, A. Stefanie (Peer reviewed; Journal article, 2020)Extensive test batteries are often needed to obtain a comprehensive picture of a person’s functional status. Many test batteries are not suitable for active and healthy adults due to ceiling effects, or require a lot of ... -
The Predictive Accuracy of the General Movement Assessment for Cerebral Palsy: A Prospective, Observational Study of High-Risk Infants in a Clinical Follow-Up Setting
Støen, Ragnhild; Boswell, Lynn; De Regnier, Raye-Ann; Fjørtoft, Toril Larsson; Gaebler-Spira, Deborah; Ihlen, Espen Alexander F.; Labori, Cathrine; Loennecken, Marianne; Msall, Michael E.; Moinichen, Unn Inger; Peyton, Colleen; Russow, Annamarie; Schreiber, Michael D.; Silberg, Inger Elisabeth; Songstad, Nils Thomas; Vågen, Randi Tynes; Øberg, Gunn Kristin; Adde, Lars (Journal article; Peer reviewed, 2019)Background: Early prediction of cerebral palsy (CP) using the General Movement Assessment (GMA) during the fidgety movements (FM) period has been recommended as standard of care in high-risk infants. The aim of this study ... -
Towards human-level performance on automatic pose estimation of infant spontaneous movements
Groos, Daniel; Adde, Lars; Støen, Ragnhild; Ramampiaro, Heri; Ihlen, Espen Alexander F. (Peer reviewed; Journal article, 2021)Assessment of spontaneous movements can predict the long-term developmental disorders in high-risk infants. In order to develop algorithms for automated prediction of later disorders, highly precise localization of segments ...