Huge thanks to co-first author Tommy Hosman and the rest of my excellent co-authors, collaborators, and reviewers. And of course to the participants who make this exciting work possible. 🙏🧠 (9/9)
The Latch decoder enabled major improvements in a challenging closed-loop multi-gesture drag-and-drop task. Participant T11 dragged icons across a screen with no gesture misdecodes in 79% of trials - compared to just 3% if a Gesture decoder was used on its own. (6/9)
This makes the Latch decoder a versatile and generalizable approach for neural control of sustained actions — with potential to enable not only better 'drag-and-drop' with a cursor, but also more intuitive and reliable operation of assistive and rehabilitative robotics. (8/9)
So we developed the “Latch” decoder, which uses two parallel LDA-HMM decoders:
1️⃣ A Gesture decoder that classifies the specific gesture being attempted
2️⃣ An Attempt decoder that latches the output to the initially decoded gesture as long as an overall ‘attempt’ is decoded
(5/9)
Decoding sustained actions like grasping and holding an object can be a challenge for iBCIs. Intracortical signals from motor cortex tend to reflect transient, dynamic phases of movement — not stable postures or holds — making tasks like “drag-and-drop” of a cursor tricky. (2/9)
Sweeping a standard, multi-class LDA decoder over trial durations revealed a marked decrease in the discriminability of gestures sustained beyond 1s.
But a binary attempt/no attempt LDA was more reliably accurate over longer gesture attempts. (4/9)
We evaluated neural activity from the precentral gyrus in two BrainGate participants using a “Gesture Hero” task — a game-like paradigm that asked participants to hold up to 7 different hand gestures for different durations. (3/9)
I’m excited to share that one of the manuscripts from my PhD work, “Multi-gesture drag-and-drop decoding in a 2D iBCI control task”, has been published in the Journal of Neural Engineering (1/9)
Link: https://t.co/bPIQgSqCCx
#NeuroTech#BCI@BrainGateTeam@IOPPublishing
20 years ago today, an extraordinary 24-year-old, unable to move his hands due to cervical spinal cord injury, volunteered to have a tiny sensor placed into his brain so that he could control a computer cursor, his room lights, and a robot arm just by thinking about it.
Safety monitoring data from 17 years (2004-2021) of research - published! Credit to amazing clinical trial participants who continue to guide the creation of restorative neurotechnologies.
@MGH_CNTR@brownengin@VAResearch@EmoryUniversity@UCDavisHealth
https://t.co/mMQLOUUwAO
@furioustheguy @DJFreedomRocket @LegendaryEnergy@washingtonpost@Reuters Their point was to inform people that exercise alone won’t prevent covid. Reuters wasnt telling people not to exercise. Vaccines are still the “best way” to prevent covid. The Washington Post article is just saying that exercise helps too. Two things can be true at once, friend.
@xoxo_meme_queen Is ketchup a sauce? What about tomato soup? Is it about the liquid’s makeup or its use? …I think I may have found myself a new PhD thesis