Developing instrumentation for imaging the tongue. Neuroanatomy and biomechanical models. Speech Motor control. No longer posting here. @awrench.bsky.social

Ere I am JH
Joined February 2009
Just published, 'The compartmental Tongue' describes a more refined and functionally relevant lingual anatomy to teach to students. It is accompanied by 3D visual teaching aids. pubs.asha.org/doi/10.1044/20…
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Great work using neurophysiological data & biomechanical modelling to determine role of M1 and S1 in motor control. From my own perspective it neither confirms not contradicts the pulse-step model which proposes spinal/brainstem neurons embody an internal model of dynamics.
How does sensorimotor (S1/M1) cortex support adaptive motor control?  Come find out in our latest preprint, which spans the development of a full adult forelimb model + physics simulations, neural-modeling for control, complex 🐭behavior 🕹️, large-scale imaging, and of course @DeepLabCut and @CEBRA!  We hypothesized that S1 supports motor learning by computing prediction errors. To tackle this, we needed to understand what is being represented, and no studies have reported what forelimb S1 represents during learning in mice🧠🐭. Moreover, this requires modeling the body🦾: kinematics, torques, force, muscle activations, & proprioception (muscle spindles & GTOs).  After our 7 year journey, we have an answer: S1 & M1 represent muscle-level features. During learning, computational motifs map to functional types (like muscle-encoding), and neural dynamics in S1 change & encode sensorimotor prediction errors!  biorxiv.org/content/10.1101/… 🧵👇
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Travelled to the north coast of Scotland for this social media exploit.
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This octopus -fish relationship seems to be akin to human-dog although obviously octopus don't breed the fish for the task.
Scientists have uncovered the secrets of multispecies hunting! Octopuses & fish team up, with fish guiding the hunt and octopuses capturing hidden prey. #UniKonstanz @CBehav+@MPI_animalbehav research reveals incredible interspecies teamwork. @NatureEcoEvo t1p.de/8543w
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Always worth virtually attending Boston Speech Motor Control Symposium (BSMCS), which next year will be held on June 12-13. sites.bu.edu/stepplab/upcomi…
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It's a new academic year. In your SLP/SLT and linguistic anatomy classes I would beg you to consider some minor changes to lingual anatomy class. Perhaps, that vowels are produced by grooving or doming different sectors by transversus & genioglossus. ICYMI pubs.asha.org/doi/10.1044/20…
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In 2018 I tweeted our first step on the *quest* to understand behavior, which was markerless tracking @DeepLabCut; xitter.cf/trackingactions/status… In 2022 the second step on this *quest* was joint models of neural dynamics & behavior @cebraAI; xitter.cf/trackingactions/status… Now in 2024 we are about to drop a manuscript about what the *quest* was … 👀🔥 stay tuned 💕🙏🏼 #proudPI 🦾🐭🦄
📣Part 1 of our quest to better understand the brain was @DeepLabCut. 🔥🦓Now Part 2: Introducing #CEBRA to jointly model neural dynamics & behavior with self-supervised learning. Hypothesis- or data-driven, highly consistent, decodable neural latents arxiv.org/abs/2204.00673 🧵👇
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🔔📢📣 Official announcement!!!📣📢🔔 We are pleased to announce MLMC 2024 -->  Friday October 4th, as a Satellite Meeting to SfN. Abstracts due by Thursday August 29th. For further details, please visit our website at motor-conference.org See you in Chicago!
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Virtual workshop with free registration. Something to crow about? covco2024.github.io
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Scots language enthusiasts, activists, insiders, fakes, rebels, enablers, learners, experimenters… Linda Bruce @OpenUniversity presents an interview study of how new speakers of Scots construct & negotiate their identities @CADS2024 Clearly Scots is alive & well 🏴󠁧󠁢󠁳󠁣󠁴󠁿🎓📚 #CADS2024
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Impossible larynx. starts.eu/maria-arnal-dimas/ An Art + Science collaboration attempting to generate vocal tract animations from voice using "AI". 🤔 instagram.com/reel/C8ILCLCqP…
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'Efference copy to cerebellum of tongue movements'
Here is Charlie, making saccades to targets, filling the tube with food, harvesting the food, and finally cleaning his lips. Meanwhile, there is a mossy fiber providing efference copy to the cerebellum for the tongue movements. Work of @Nazanin_Mrezaei and @JDoostmohammadi
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Here is an example of one 3D model of the neuromuscular compartments of the genioglossus muscle. There are up to 10 compartments arranged in pairs for the left genioglossus muscle and another 10 for the right. skfb.ly/oQCSL
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There is also open source 3D biomechanical modelling application at this site github.com/articulateinstrum… Students can adjust muscle contractions interactively to see how they change the shape and position of the tongue.
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For anyone not attending #UltraFestXI here is a link to our poster. It shows EMA tongue sensor positions can be accurately estimated from #Ultrasound using #DeepLabCut. This means ultrasound can be used for whole tongue kinematic articulatory research. tinyurl.com/nhct26d9
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Theorists have long proposed that the cerebellum computes an internal model. From a control perspective, what is an internal model and how might the cerebellum compute it? Mireille Broucke will teach us about internal models and the cerebellum.
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For anyone interested, who missed my #ISSP2024 poster, here is a copy. Since this presentation, there has been further progress on the likely function of Renshaw cells and observation of pacemaker gating more widely in mammalian motor control. More soon. tinyurl.com/4yyhj89p
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