Lorenz Assländer
@cybal.bsky.social
420 followers 780 following 73 posts
Researching the CYbernetics of human BALance multisensory integration | balance control | motor control | biomechanics VR to test balance | AR to improve balance Wannabe Entrepreneur
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cybal.bsky.social
Is it me, or the train moving?
We use vision to maintain balance. Just close your eyes while standing on one leg and you typically feel less stable. But if we use vision, how come we do not fall when looking at a moving visual reference, e.g. a train?
📈🧠🧪
#sensorimotor #balance #BiomechSky
Reposted by Lorenz Assländer
youranoncentral.bsky.social
Jane Goodall offers sage advice for the rest of us. #3E
Reposted by Lorenz Assländer
brianumberger.bsky.social
Please repost!

We have an open rank, tenure-line faculty position in biomechanics in the School of Kinesiology at the University of Michigan Ann Arbor. At U-M we have great colleagues, exceptional resources, and biomechanics can be found all across the campus. #BiomechSky
Tenure-track Faculty Position in Biomechanics (Open Rank), University of Michigan, Ann Arbor, MI, USA - Biomch-L
The School of Kinesiology (http://kines.umich.edu) at the University of Michigan invites applications and nominations for a tenure-track faculty position at the level of Assistant Professor, Associate...
biomch-l.isbweb.org
cybal.bsky.social
Fully agree! Visual, vestibular and also proprioceptive sensory systems all have prominent velocity signals.
cybal.bsky.social
🧠📈 #neuroskyence
cybal.bsky.social
Our data is from sway behavior during standing balance. We believe the mechanism is generally relevant for the internal reconstruction of body orientation and #selfmotion for #motorcontrol, #perception, and #navigation.
cybal.bsky.social
In a linear system, visual scene motion evokes body sway at just those frequencies contained in the scene motion. We predicted a distortion using simulations, where body sway is evoked at frequencies NOT contained in the scene motion. This non-intuitive prediction was confirmed in experiments.
cybal.bsky.social
This reflects a reduced reliance on vision, quantitatively reproduced by the RFM mechanism.
Furthermore, the RFM model - once tuned - also predicts sway in new sequences (Prediction).
cybal.bsky.social
A typical behavior is that subjects sway increases less than proportional when increasing the movement amplitude of the visual reference: the 'gain' (amplitude ratio between body sway and stimulus) is reduced with increasing stimulus amplitude (Model fit left-to-right).
cybal.bsky.social
We implemented this mechanism in a closed-loop balance control model and compared its behavior with the sway responses of 24 subjects viewing a moving visual screen in a virtual reality head-mounted display.
cybal.bsky.social
The magic comes in, when assuming that the RFM reconstruction is blocked at small velocities and corrects (= is added to) the visual self-motion signal when exceeding a certain velocity threshold.
Why magic? It explains human behavior related to context dependent changes in sensory contributions.
cybal.bsky.social
In our new paper, we present evidence that the CNS continuously estimates the movement of the visual reference by comparing visual to other sensory cues. This reconstruction of Reference Frame Motion (RFM) happens in velocity. Why?
cybal.bsky.social
The underlying question is a fundamental problem in neuroscience: how does the nervous system construct body orientation from multiple, potentially conflicting sensory inputs?
We might have a solution.
cybal.bsky.social
Is it me, or the train moving?
We use vision to maintain balance. Just close your eyes while standing on one leg and you typically feel less stable. But if we use vision, how come we do not fall when looking at a moving visual reference, e.g. a train?
📈🧠🧪
#sensorimotor #balance #BiomechSky
Reposted by Lorenz Assländer
phdcomics.com
Newton's Laws of Graduation, Part 1
Reposted by Lorenz Assländer
k4tj4.bsky.social
1
To predict the behaviour of a primate, would you rather base your guess on a closely related species or one with a similar brain shape? We looked at brains & behaviours of 70 species, you’ll be surprised!

🧵Thread on our new preprint with @r3rt0.bsky.social , doi.org/10.1101/2025...
Brain Surfaces of 70 primate species
Reposted by Lorenz Assländer
melvynroerdink.bsky.social
Looking for a PhD-student position? Eager to work with advanced rehabtech and scalable augmented-reality solutions for fall-risk assessment and treatment? Learn from a team of scientists, Strolll entrepreneurs & developers and clinicians? Love interacting with older adults in NL & BE? Please apply!
Reposted by Lorenz Assländer
neural-reckoning.org
I wrote an article earlier in the week arguing that we need to give junior researchers more independence earlier, and this should be our focus, not moonshot mega projects led by senior researchers.

I was surprised how much agreement I'm seeing.

So next question: how do we do this?
cybal.bsky.social
Jep, I fully agree. We did that in the last round and he/she was not happy.
Problem is: I see the confirmation of a true and strong a priori prediction as very good evidence and he/she wants us to exclude all alternative explanations, which is simply impossible. Pretty fundamental disagreement 🤷‍♂️