#tweeprint of our new preprint: we found speech-related neural activity obtained using multielectrode recordings in the dorsal (!) motor cortex of people with paralysis. https://www.biorxiv.org/content/early/2018/12/30/505487 …
1/
-
-
Could these signals be useful for building speech BCIs to help people who cannot speak? We think so! We could decode amongst a set of syllables pretty well, despite having only 200 electrodes in a sub-optimal part of the brain. 8/pic.twitter.com/dltUsK2Mvo
Prikaži ovu nit -
This makes me optimistic about intracortical approaches for speech BCIs, but there’s still a long road from this limited proof of feasibility to a real-time system synthesizing continuous speech. Recent work from the ECoG folks is paving the way in this domain. 9/
Prikaži ovu nit -
What about the neural population dynamics during speaking? There are a lot of interesting questions one could ask. As newcomers to speech from the arm control field, we chose to start by bringing what we know. 10/
Prikaži ovu nit -
We tested for whether two major motor cortical population dynamics features previously described by our group during arm movements were also present during speaking. 11/
Prikaži ovu nit -
Neural dynamics motif #1: Population activity is dominated by a large condition-invariant signal (CIS) when initiating speaking. Here we applied the methods of Kaufman et al 2016 (
@MattAntimatt): 12/pic.twitter.com/t2w2db72iP
Prikaži ovu nit -
Neural dynamics motif #2: Strong rotatory dynamics are present during speech production. Here we applied the methods of Churchland, Cunningham et al 2012:pic.twitter.com/cVh5CKQgx1
Prikaži ovu nit -
Why this is the case is a fascinating open question. It may be that if these are effective computational strategies for generating the right muscle commands for arm and hand movements, then they’re also well-suited for generating speech-producing muscle commands. 14/
Prikaži ovu nit -
Another open question is whether finding this activity in "arm" motor cortex is due to remapping because of the participants' tetraplegia. We don't think this is the case, but a definite answer is elusive because we'd need intracortical recording in able-bodied people. 15/15
Prikaži ovu nit
Kraj razgovora
Novi razgovor -
Čini se da učitavanje traje već neko vrijeme.
Twitter je možda preopterećen ili ima kratkotrajnih poteškoća u radu. Pokušajte ponovno ili potražite dodatne informacije u odjeljku Status Twittera.

+
+
| AP Giannini, Burroughs Wellcome CASI, Stanford Wu Tsai Postdoc Fellow