Ben Hayden
@benhayden.bsky.social did:plc:r7rxa6vgfjupkoisqreffee6
Professor of Neurosurgery, Baylor College of Medicine
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Ben Hayden (@benhayden.bsky.social), 1 Mayıs 2023 tarihinde katılan bir Bluesky kullanıcısı. 4.233 takipçisi var, 4.942 hesabı takip ediyor ve 1.651 post paylaştı.
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Postu gösterWe further confirmed these results with RNN models. We concluded that metacognitive monitoring during deliberation is a dissociable operation, not a readout of the perceptual circuit, and that its substrate is not localized to LIP. 6/6 Final paper: www.biorxiv.org/content/10.6...
Postu gösterWhen monkeys made an uncertainty response (Tin), LIP activity stayed flat until it rose late and stereotypically by the time of saccade, lacking the coherence-scaled ramp of accumulation that the same neurons showed when monkeys made perceptual decisions. 5/6
Postu gösterSo where does that second accumulator live? We recorded single units in LIP, the canonical evidence-accumulation area, and examined its population dynamics. LIP shows every signature of a perceptual accumulator, and none of an uncertainty one. 4/6
Postu gösterBehaviorally, a model with two parallel accumulators — one for perceptual evidence and one for uncertainty — outperforms models in which uncertainty is derived solely from the perceptual decision variable. The uncertainty readout is not a byproduct of the choice signal. 3/6
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