Alan Wrench
@awrench.bsky.social
Developing instrumentation for imaging the tongue. Neuroanatomy and biomechanical models. Pulse-Step model of motor control. Natural sceptic.
Note all the articulation happening in the posterior tongue and hyoid which is not captured by EMA.
September 17, 2025 at 3:54 PM
Note all the articulation happening in the posterior tongue and hyoid which is not captured by EMA.
I understand that you need to minimize kit to take to remote parts. A mirror would be convenient. I think we need to do two things. Change the 50mm camera for a wide angle one so that a peripheral mirror is in view. Then design a 45° mirror mount to fit on the side camera mount. I can try this out.
September 1, 2025 at 3:05 PM
I understand that you need to minimize kit to take to remote parts. A mirror would be convenient. I think we need to do two things. Change the 50mm camera for a wide angle one so that a peripheral mirror is in view. Then design a 45° mirror mount to fit on the side camera mount. I can try this out.
Hi Matt, AAA can only record one video channel for reasons to do with having to associate splines with input data streams and also the large amount of disk space that would accumulate. In the past we used a CCTV camera mixer. However, I purchased one recently and couldn't get it to work.
September 1, 2025 at 3:05 PM
Hi Matt, AAA can only record one video channel for reasons to do with having to associate splines with input data streams and also the large amount of disk space that would accumulate. In the past we used a CCTV camera mixer. However, I purchased one recently and couldn't get it to work.
Sosnik et al 2004 link.springer.com/article/10.1...
Sosnik et al 2006 link.springer.com/article/10.1...
Sosnik et al 2007 journals.physiology.org/doi/full/10....
Sosnik et al 2006 link.springer.com/article/10.1...
Sosnik et al 2007 journals.physiology.org/doi/full/10....
When practice leads to co-articulation: the evolution of geometrically defined movement primitives - Experimental Brain Research
The skilled generation of motor sequences involves the appropriate choice, ordering and timing of a sequence of simple, stereotyped movement elements. Nevertheless, a given movement element within a w...
link.springer.com
July 22, 2025 at 2:54 PM
Sosnik et al 2004 link.springer.com/article/10.1...
Sosnik et al 2006 link.springer.com/article/10.1...
Sosnik et al 2007 journals.physiology.org/doi/full/10....
Sosnik et al 2006 link.springer.com/article/10.1...
Sosnik et al 2007 journals.physiology.org/doi/full/10....
With my interest in speech, I very much welcome this new work on limb movement sequences. Readers may also be interested in the seminal series of papers published 20 years ago on this topic by Sosnik et al most recently cited by @galeaj.bsky.social (refs 12-14) journals.plos.org/plosone/arti...
The effects of haloperidol on motor vigour and movement fusion during sequential reaching
Reward is a powerful tool to enhance human motor behaviour with previous research showing that during a sequential reaching movement, a monetary incentive leads to increased speed of each movement (mo...
journals.plos.org
July 22, 2025 at 2:54 PM
With my interest in speech, I very much welcome this new work on limb movement sequences. Readers may also be interested in the seminal series of papers published 20 years ago on this topic by Sosnik et al most recently cited by @galeaj.bsky.social (refs 12-14) journals.plos.org/plosone/arti...
Not inconsistent with the proposal that an initial feedforward motor cortical pulse determines direction and velocity of movement and a step change near peak velocity modulates deceleration to bring the movement on target. This paper, finds that the cerebellum generates the deceleration step change.
July 13, 2025 at 3:11 PM
Not inconsistent with the proposal that an initial feedforward motor cortical pulse determines direction and velocity of movement and a step change near peak velocity modulates deceleration to bring the movement on target. This paper, finds that the cerebellum generates the deceleration step change.
I believe the cerebellum and possibly motor nuclei learn and map the expected sensory input for a given set of feedforward muscle activations. If there is a mismatch, the cerebellum generates corrective output. If the mismatch persists the cerebellum slowly adapts to the new sensory expectation.
July 12, 2025 at 2:19 PM
I believe the cerebellum and possibly motor nuclei learn and map the expected sensory input for a given set of feedforward muscle activations. If there is a mismatch, the cerebellum generates corrective output. If the mismatch persists the cerebellum slowly adapts to the new sensory expectation.
Nice paper but overlooks the groundbreaking and elegant work describing movement sequence learning. Sosnik, R., Hauptmann, B., Karni, A., & Flash, T. (2004). When practice leads to co-articulation: the evolution of geometrically defined movement primitives. Experimental Brain Research, 156, 422-438.
July 9, 2025 at 10:20 AM
Nice paper but overlooks the groundbreaking and elegant work describing movement sequence learning. Sosnik, R., Hauptmann, B., Karni, A., & Flash, T. (2004). When practice leads to co-articulation: the evolution of geometrically defined movement primitives. Experimental Brain Research, 156, 422-438.
Video corresponding to above glossogram. Red line is midsagittal tongue contour automatically estimated using #DeepLabCut Blue line indicates base of mandible to hyoid and purple line indicates base of mandible to short tendon. In collaboration with @drjoanma.bsky.social
May 27, 2025 at 11:52 AM
Video corresponding to above glossogram. Red line is midsagittal tongue contour automatically estimated using #DeepLabCut Blue line indicates base of mandible to hyoid and purple line indicates base of mandible to short tendon. In collaboration with @drjoanma.bsky.social