Pre-Conference Seminars

The pre-conference Seminars will be held in OsloMet-Oslo Metropolitan University.

Please note that the Seminars run in parallel with the Gait Course.

Tuesday 10 September from 08:30 to 12:15

Python programming for the movement sciences (S1)

1. Background and rational for the proposed seminar

Movement science has a long history, even prior to the advent of the modern computer [1]. Since then, however, computers and computer programming in particular have become crucial tools for data processing and analysis. Languages such as Matlab (The Mathwork Inc., Natick USA) have dominated in research settings, primarily due to its native and intuitive handling of matrix algebra, but, arguably, also thanks to its availability free of charge for end users in most academic institutions. Today, Python programming has come to dominate other fields, such as machine learning, as its open-source implementation is attractive to users outside academia (free) and promotes community development, review, and improvement of toolboxes. Nonetheless, Python may be intimidating to movement scientists and clinicians without a computer science background (most of us). We propose a pre-conference seminar aimed at helping the community migrate towards Python. The session will comprise three sections (1) introduction to Python programming (45 min), (2) overview of tools and toolboxes for the movement sciences (1h), introduction to AI coding assistants (15 min), and (3) practical session to help attendees migrate/develop their code in Python (1h). For part 2, we propose to review python-based biomechanical models (PyCGM2[2], openOFM [3]), the NeuroGeriatricMotionToolbox (NGMT), and the Gait and Movement Analysis Package (gaitmap). We believe that the pro-motion and use of Python in our society will help accelerate research and development, leading to quicker innovations and improved outcomes in the field (e.g. clinical care, sport analysis).

2. Audience

Researchers who are new to Python but have experience in other languages (e.g. Matlab).

3. Goals of the seminar

• Understand the Python framework (syntax, structure, toolboxes, IDEs)
• Be aware of major differences between Python and Matlab
• Gain knowledge of AI coding assistants (e.g. Github’s copilot)
• Learn about movement science tools available for Python

4. References

[1] Baker, R Gait & Posture 2007 26, 331–342, 10.1016/j.gaitpost.2006.10.014 [2] Leboeuf,

10. et al. Gait & Posture 2019 69, 235–241, 10.1016/j.gaitpost.2019.04.015 [3] Dixon, P; et al.

Gait & Posture 2023, 106, S49–S50, 10.1016/j.gaitpost.2023.07.063

	Philippe C. Dixon is an assistant professor at McGill University (Canada). His research focuses on the analysis of human movement biomechanics using motion capture systems and wearable devices, with the aim of improving the health and mobility of patients and athletes. He is also very active in the application of machine learning techniques for the detection and prediction of physiological events and states, and in the development of software for data analysis. Previously, Dr. Dixon earned his PhD in Engineering Science from the University of Oxford and completed his post-doctoral fellowship at Harvard University.
	Clint Hansen is a sport scientist by training and has research experiences in many countries. Currently he is appointed deputy head of the neurogeriatrics research group at the University Medical Centre, Kiel, Germany. His research is focused on understanding and characterizing the biomechanics of human movement, with his most current projects involving the development of digital outcome measures that could serve as objective clinical endpoints.
	Robbin Romijnders has a background in biomedical engineering and holds a PhD in Electrical Engineering and Information Engineering. In his research, he focuses on the analysis of wearable sensor signals to understand how movement patterns are affected by the presence of different neurodegenerative diseases. He has experience in both conventional signal processing techniques and machine learning applications.
	Jill Emmerzaal is currently a post-doctoral researcher at McGill University and has a background in physiotherapy and movement sciences. Dr. Emmerzaal obtained a PhD in biomedical sciences from the KU Leuven and Physiotherapy and Rehabilitation sciences from Hasselt University, Belgium. Their research mainly focuses on studying human movement using wearable sensors, non-linear signal analysis, and a bit of machine learning aimed to provide methods for data informed rehabilitation.

Tuesday 10 September from 13:15 to 17:00

Lower limb orthoses and influence on gait and motion in children and adults (S2)

In this seminar we will use evidence-based practice and clinical cases to explore efficacy, limitations, and options of lower limb orthoses to influence gait and function in persons with neurological and musculoskeletal conditions.

Although the focus will be on 3D motion analysis and gait biomechanics, we will discuss how to monitor performance and assess orthotic efficacy outside the gait lab, in activities of daily living.

Learning objectives of the seminar:

• Understand basic biomechanical principles of lower orthotic force systems and designs.
• Distinguish relevant outcome measures, elaborating on instrumented 3D motion analysis to evaluate orthotic indication and efficacy.
• Apply practical perspectives of orthotic evaluation in the gait lab, including orthosis and shoe inspection, anthropometric measures, marker placement and 3D model considerations.
• How do we evaluate whether a person can benefit from an orthosis and what are optimal designs and properties for varying functional levels? ‘The Orthotic process’ will be presented which involves ICF-centered analysis and assessment of the person, Goal formulation, Fitting of the orthosis, and Evaluation of the results.
• Recognize evolving orthotic needs with age, functional and diagnosis-specific demands

	Ingrid Skaaret, CPO (PhD), ass. professor Oslo Metropolitan University Ingrid is a Certified Prosthetist Orthotist (CPO), associate professor at Oslo Metropolitan University, and member of the gait lab team at Oslo University Hospital and Sophies Minde Ortopedi. She received her PhD from the University of Oslo in 2021 with the thesis ‘Children with cerebral palsy: The impact of ankle-foot orthoses on gait function after lower limb surgery’. Her main clinical competence and research interest lies within lower limb orthotics, biomechanics, optimizing orthoses, gait, and function in persons with neuromuscular and orthopaedic conditions.
	Åsa Bartonek, PT (PhD), ass. professor Karolinska Institutet, Stockholm Åsa received her PhD from Karolinska Institutet (KI) Sweden in 2001 and became associate professor in Physiotherapy in 2010. Currently she is active as a senior researcher at the department of Women’s and Children’s Health at KI. Clinical experience in congenital and neurodevelopmental disabilities in children has been gained through many years as a clinical habilitation physiotherapist and by influences of German and Italian teams.  Her research fields include neurological and neuro-orthopedic diagnoses where her work regarding gait and orthotics have been implemented in clinic, in close cooperation with CPOs. In children with CNS lesions, the perceptual-motor system perspective has come to determine her view of motor development. Her research articles cover methods from laboratory gait analysis to prospective follow-up studies, parent-reported quality of live and spatial navigation ability.
	Marie Eriksson, CPO (PhD), Karolinska Instutet, Stockholm Marie is a Certified Prosthetist & Orthotist (CPO) and received her PhD from Karolinska Institutet (KI) Sweden in 2016. Currently she works clinically as a CPO at TeamOlmed in Stockholm and as a researcher at the department of Women’s and Children’s Health at KI. Her research fields include neurological and musculoskeletal diagnoses. Her studies cover methods from gait analysis, follow-up studies from childhood to adulthood and satisfaction with orthotic and prosthetic devices.

Wednesday 11 September from 08:30 to 12:15

Systematic interpretation of clinical gait analysis data in children with cerebral palsy (S3)

Background

Clinical gait analysis is used worldwide by many centers, to quantitatively and objectively identify gait problems. However, currently, no (international) uniform methods to systematically and objectively interpret gait data are available. By means of a Delphi study, a Dutch expert group of rehabilitation physicians, movement scientists, and physiotherapists compiled a comprehensive list of 120 links between abnormal gait features and their potential underlying impairments, including probability scores¹⁾. These linkages were based on the Impairment Focused Interpretation (IFI) method ²⁾ combined with clinical and biomechanical reasoning. Based on this list, the GAIT.SCRIPT interpretation tool was developed to facilitate this interpretation process for the clinician.

By the end of the seminar

Participants will have learned the concepts behind the systematic interpretation of gait analysis based on the Impairment Focused Interpretation (IFI) method²⁾, complemented with a systematic way to link gait features to underlying impairments by using the GAIT.SCRIPT interpretation tool.

Outline

The seminar will be a combination of short plenary lectures and hands-on exercises with impairment-focused interpretation and the GAIT.SCRIPT tool, so bring your laptop along! Furthermore, there will also be ample room for interactive discussion and feedback.

References

1. Van der Krogt MM, Houdijk H, Wishaupt K, van Hutten K, Dekker S and Buizer AI (2022) Development of a core set of gait features and their potential underlying impairments to assist gait data interpretation in children with cerebral palsy. Hum. Neurosci. 16:907565
2. Baker, R. Measuring walking: a handbook of clinical gait analysis. 1st edition. London Mac Keith Press, 2013

Wednesday 11 September from 13:15 to 17:00

Machine Learning for Clinical Gait Analysis: a quick start guide for newcomers (S4)

Over the last few decades, clinical gait analysis (CGA) has had a remarkable impact on human movement science in both clinical and research settings by refining the possibilities to quantitatively describe human gait and deepen our understanding about pathologies and their treatment options. Despite the positive impact of CGA in healthcare, clinicians and researchers encounter challenges in effectively leveraging the wealth of information obtained by CGA. This arises from the high dimensionality and complexity of CGA data, which is characterized by (high) variability within and between individuals while being influenced by a plethora of factors such as walking speed, age, sex, and anthropometry.

Therefore, it is not surprising that machine learning-based approaches have gained increased attention over the last years. As of today, machine learning has been utilized in various ways to support knowledge generation and (medical) decision support. While the popularity of utilizing machine learning has rapidly increased in research and clinical settings, it simultaneously presents difficult challenges for our gait analysis community. Questions arise, such as what is machine learning? How does it work? Where are its limitations? Does it offer any value for my work or research? How should I get started? And many more.

This workshop will cover the basics of machine learning, its applications in gait analysis, and its limitations. The workshop will provide hands-on experience with machine learning-based approaches to analyze gait data. The workshop is addressed to everyone who is interested in CGA and machine learning. There is no need to have programming skills since we will use an open-source visual programming tool (Orange). Specifically, the following topics will be covered:

Current trends and topics in using machine learning in clinical gait analysis.

• A quick start guide to create machine learning workflows for non-coders.
• An introduction to data exploration and dimensionality reduction techniques.
• Machine learning-based classification and regression.
• Enhancing transparency of “black box” machine learning models.

By the end of the workshop, participants will have a better understanding of how machine learning can be used to support clinical gait analysis and know about their (current) limitations.

The workshop will be organized by Brian Horsak and Djordje Slijepčević from the St. Pölten University of Applied Sciences. The workshop will be further supported by two team members of Brian Horsak, Bernhard Dumphart und Philipp Krondorfer. Both are PhD students actively engaged in the application of machine learning in clinical gait analysis. Participants should bring a laptop with Orange installed. The download link for necessary data will be made available a few weeks prior to the seminar.