Sjoerd Bruijn

Any people going to #isb2025 on here? Thinking of going bouldering there one evening. Want to join? Let me know!

See you in Japan! #ISPGR2027

If this were a normal @ispgr.bsky.social and I would be handling the official account as usual, this is the moment I would sign off. Not this year. Keynote tomorrow at 8:30. Party in full swing. Loving it! See you all tomorrow! #ispgr2025

Btw, this is only part of the team. Some members were mia due to the huge and very interesting poster session

Yes or no debates finally back. Who takes the prize? #ISPGR2025

Have you met any of our JPND funded STEPuP project members yet? We cannot be missed! Ask us about this amazing project @ispgr.bsky.social #ispgr2025

The lead author will present this study at #ISPGR2025!

🧠 Session O.01 – Coordination of Posture & Gait in PD
📅 30th June | 🕒 15:30–17:30
📍 Auditorium 2

Meeting friends old and new on #ispgr2025. Hope to connect online as well! @ispgr.bsky.social

Foot placement coordination is impaired in people with Parkinson’s Disease Background Gait instability is a common and disabling symptom of Parkinson’s disease (PD), contributing to frequent falls and reduced quality of life. While clinical balance tests and spatiotemporal g...

And another preprint, this one from our STEPUP consortium: "Foot placement coordination is impaired in people with Parkinson’s Disease". Too many authors to tag!
www.biorxiv.org/content/10.1...
feedback welcome!

The contribution of vestibular and proprioceptive signals to trunk stabilization varies between postural tasks and between walking speeds Stabilizing the upright posture of the trunk relies on vestibular and proprioceptive afference. Previous studies found that the feedback responses to sensory afference vary between postures and tasks....

New preprint by Yiyuan Li, with @jvandieen.bsky.social and others; The contribution of vestibular and proprioceptive signals to trunk stabilization varies between postural tasks and between walking speeds. www.biorxiv.org/content/10.1...
feedback welcome!

On my way to Maastricht for @ispgr.bsky.social! See you there!

Just make sure to bring some sporty clothes

Bump. Who will join for bouldering? probably tuesday after conference.

sure! I will make a communication channel of some sorts, and communicate about the planning.

The Impact of Visual Perturbations on Balance Control during Walking Visual perturbations may lead to a perception of self-motion and affect balance control. We studied effects of different visual perturbations in 16 healthy young participants walking on a treadmill, b...

New preprint with Yaqi Li, Eugenie Lambrecht and @jvandieen.bsky.social; www.biorxiv.org/cgi/content/...
Suggestions and feedback welcome!
#BiomechSky

Vote for @leeuwenmoira.bsky.social and Mohammadreza!
www.formdesk.com/vuamsterdam/...

Want to do this. Shall I do this?

Mentor Program - ISPGR

Also, (ssssht, tell this to your students!) I've heard that despite the deadline, the registration for the mentorship programme is still open..... What are you(re students) waiting for?
ispgr.org/mentor-progr...
#biomechsky

So who on here is going to ISPGR this year? Anyone up for a night of bouldering? There's a great gym in Maastricht... #Biomechsky

That time of the year again…. Waiting for an old geezer on the other side of the pond to light a cigarette, so the refreshing of my feed can begin… #bm100

:-). Partially caused by my inability to Google, and my knowledge that the people out here are still way smarter than LLMs... ;-)

Or, maybe you need to know one (either alignment or position), but you would probably be able to estimate the other than, right? And wouldnt that be optimal over assuming these both? Or is this optimisation problem simply to underdetermined then? My gut feeling says this should be possible?

btw, the toolbox looks super cool, and I've been wanting to play with it, but little time. Hopefully this summer.

Ok, one last, maybe ignorant question. You assume known IMU locations and sensor to segment alignment(time invariant), and then fit model on angular velocity and acceleration. Would it be possible to use orientation data in addition, and by doing so estimate the time invariant parameters?

Inverse dynamics of mechanical multibody systems: An improved algorithm that ensures consistency between kinematics and external forces Inverse dynamics is a technique in which measured kinematics and, possibly, external forces are used to calculate net joint torques in a rigid body linked segment model. However, kinematics and forces...

The 2D one you provide goes straight to their journal club. Will be tough, but fun I think. We discuss similar thing for IK from mocap data (journals.plos.org/plosone/arti...), so they should be able to handle this I feel.

This is great, thanks! Probably would have found this by pubmed after long enough, but was a bit at a loss what to search for!

tnx :-)

Thats more or less what I mean. What's interesting is that they skip orientation alltogether.....

Do you have info on how you use that? (looking for info for a course I'm teaching... )

#BiomechSky; question for all you IMU people... (forgot to tag earlier)