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Shih-Chieh Lin

@sclin-lab.bsky.social
415 followers 455 following 44 posts

Neuroscience Professor @ National Yang Ming Chiao Tung University, Taiwan | NIH alum | neurophysiology | decision making | attention | reward | #BasalForebrain

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Shih-Chieh Lin @sclin-lab.bsky.social · 05/10/2026
Congratulations to @deisseroth.bsky.social !!!
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
We think this reveals a new organizing principle for reward prediction: DA neurons can rapidly recruit a second broadcast system with distinct downstream targets. Glutamate co-release may provide the noncanonical DA-neuron output that enables this real-time coupling. 10/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
Taken together, DA neurons exert millisecond-scale causal control over BF bursting, from phasic reward-prediction responses to ongoing activity. This links two major subcortical systems previously studied largely independently into a directionally coupled circuit. 9/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
Anatomical tracing provided a plausible mechanism: VTA DA neurons formed glutamatergic synapses onto predominantly noncholinergic BF neurons. Together with the D1/D2 result, this points to glutamate cotransmission as a leading candidate for the rapid DA→BF signal. 8/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
But what carries a signal this fast? Canonical D1/D2 receptor signaling is predominantly metabotropic and difficult to reconcile with ~10-ms coupling. Indeed, rapid BF recruitment by DA-neuron activation persisted during combined D1/D2 receptor blockade. 7/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
The converse was even more striking. Inhibiting DA neurons, at cell bodies or axon terminals in BF, suppressed BF bursting with the same rapid latency, including ongoing firing outside task events. DA neurons therefore exert continuous control over a subset of BF bursting neurons. 6/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
We next tested causality by activating DA neurons. Brief excitation rapidly evoked BF bursting at the same ~10-ms timescale. Direct stimulation of DA axon terminals in BF produced similarly rapid responses, with even shorter latencies. DA activity is sufficient to recruit BF bursting. 5/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
Timing revealed an even tighter relationship. Spike-time cross-correlation showed DA activity leading BF bursting by ~10 ms. The same offset persisted during ITIs and across learning stages, and noise-correlation analysis recovered the same offset after removing event-locked responses. 4/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
Simultaneous recordings in behaving rats revealed strong trial-by-trial coupling in DA and BF response amplitudes. This relationship persisted across behavioral events and learning stages, arguing for a robust functional link between the two systems. 3/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
DA and BF reward-prediction signals have largely been studied in separate frameworks. Yet their activity is strikingly similar. This was unexpected because BF receives relatively sparse dopaminergic innervation and is not considered a canonical DA target. 2/10
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Shih-Chieh Lin @sclin-lab.bsky.social · 03/10/2026
New preprint from our lab ⚡ Why do DA and BF bursting neurons carry such similar reward-prediction signals? Are they independent, driven by common input, or causally linked? We find a direct answer: DA activity rapidly and causally drives BF. www.biorxiv.org/content/10.6... 1/10
biorxiv.org
Dopamine neurons drive basal forebrain reward prediction in milliseconds
Phasic reward prediction signals in ventral tegmental area (VTA) dopamine (DA) neurons and basal forebrain (BF) noncholinergic bursting neurons are remarkably similar despite the distinct circuit…
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Shih-Chieh Lin @sclin-lab.bsky.social · 23/05/2026
Congratulations! Really beautiful work.
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Shih-Chieh Lin @sclin-lab.bsky.social · 23/05/2026
Yes this has been a problem. We showed this in Figure 9 of this behavioral study. It was painful to realize this at the end. www.frontiersin.org/journals/neu...
frontiersin.org
Frontiers | Proactive and reactive inhibitory control in rats
Inhibiting actions inappropriate for the behavioral context, or inhibitory control, is essential for survival and involves both reactively stopping the curre...
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Shih-Chieh Lin @sclin-lab.bsky.social · 23/05/2026
Congratulations @vijay-mkn.bsky.social ! This is beautiful. Do you think these conclusions also apply to operant conditioning? Or specific for classical conditioning? My intuition is that when animals’ actions are involved, the learning rule should be different.
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Shih-Chieh Lin @sclin-lab.bsky.social · 16/05/2026
Congratulations! Beautiful work!
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Shih-Chieh Lin @sclin-lab.bsky.social · 28/03/2026
Indeed. I think partitioning the contributions of global (soma) vs local (axon) regulations of release is a fundamental issue in understanding neuromodulatory systems.
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Shih-Chieh Lin @sclin-lab.bsky.social · 28/03/2026
This type of spatial heterogeneity is also observed in cortical acetylcholine signals: eg retinotopic ACh release in visual cortex. These observations also support local regulation at axon rather than at soma level. pmc.ncbi.nlm.nih.gov/articles/PMC...
pmc.ncbi.nlm.nih.gov
Visual stimulation drives retinotopic acetylcholine release in the mouse visual cortex
Cholinergic signaling is involved with a variety of brain functions including learning and memory, attention, and behavioral state modulation. The spatiotemporal characteristics of neocortical acetylcholine (ACh) release in response to sensory ...
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Shih-Chieh Lin @sclin-lab.bsky.social · 28/03/2026
Beautiful results! Does the presence of localized NE transients in VC suggest that NE release is not controlled globally by NE soma spiking activity but instead at the NE axon terminal level?
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
Huge thanks to lead author Sz-Wen Liu (@szwenliu.bsky.social)—freshly minted PhD 🎓—for leading this project from start to finish. Also grateful to our colleagues at NYCU, lab members, and reviewers who helped sharpen this study. 10/end
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
We also see a negative correlation between stimulus-locked bursts and outcome responses—an RPE-like signature consistent with prior reports—suggesting BF bursts may transform stimulus-onset RPE into an attention-for-performance amplification signal. 9/n
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
Bimodal and unimodal trials show similar behavior and BF patterns, consistent with prior BF work: bigger bursts → faster reward seeking; suppression → nogo/rapid stopping. Extends a bidirectional gain-control view to selective attention. 8/n
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
BF population activity mirrors behavior trial by trial, tracking attention switches during block transitions as well as spontaneous A↔V shifts, and aligning neural dynamics with the animal’s current attentional set. 7/n
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
Interpretation: selection of the attended modality occurs upstream of BF; BF then provides a modality-common, post-selection/target-detection signal—an amplification that links attended targets to reward-seeking actions. 6/n
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
When A and V oddballs co-occur but only one is attended, BF shows neither divisive normalization nor multisensory synergy. Instead, attended and ignored streams are processed in parallel and summed (near) linearly. 5/n
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
Converge, not diverge: the same BF neurons carry attended A and attended V signals. Across units, amplitudes are tightly correlated (r≈0.8); variability is essentially a single scalar (amplitude), not modality tuning—unlike modality-specific attention signals in corticothalamic circuits. 4/n
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
Single noncholinergic BF "bursting" neurons show strong, short-latency bursts to attended targets and minimal responses to identical stimuli when ignored. BF activity tracks behavior in real time, even during spontaneous shifts of attention. 3/n
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
We built a new cross-modal oddball task in rats that pits auditory (A) vs. visual (V) stimuli simultaneously and allows both instructed and spontaneous attention shifts. Choices are unaffected by the unattended stream—clean behavioral evidence for cross-modal selective attention. 2/n
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/02/2026
New lab paper in #ScienceAdvances: we identify a modality-common selective-attention signal in noncholinergic #BasalForebrain (BF) “bursting” neurons, distinct from the modality-specific attention signals typically described in corticothalamic circuits. 1/n www.science.org/doi/full/10....
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Malcolm Campbell @malcolmgcampbell.bsky.social · 19/09/2025
🚨Our preprint is online!🚨 www.biorxiv.org/content/10.1... How do #dopamine neurons perform the key calculations in reinforcement #learning? Read on to find out more! 🧵
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Shih-Chieh Lin @sclin-lab.bsky.social · 20/09/2025
Congratulations! Really beautiful work!
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Zero-Noise Lab @zeronoiselab.bsky.social · 10/06/2025
Now out in @natcomms.nature.com‬: Mice and monkeys spontaneously shift through comparable cognitive states - and it's written all over their faces! (1/7) www.nature.com/articles/s41...
nature.com
Inferring internal states across mice and monkeys using facial features - Nature Communications
Here, the authors created a virtual reality task for monkeys and mice to explore if internal states like attention are similar across species. Their facial expressions during the task were similar, su...
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Paul Masset @paulmasset.bsky.social · 04/06/2025
Together with this paper by the group of Joe Paton www.nature.com/articles/s41... our results across the two papers complement each other providing strong evidence that distinct dopamine neurons discount future rewards at different rates providing a substrate for multi-timescale RL in the brain
nature.com
A multidimensional distributional map of future reward in dopamine neurons - Nature
An algorithm called time–magnitude reinforcement learning (TMRL) extends distributional reinforcement learning to take account of reward time and magnitude, and behavioural and neurophysiological...
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Paul Masset @paulmasset.bsky.social · 04/06/2025
Our work with Pablo Tano, @hyunggoo-kim.bsky.social Athar Malik, Alexandre Pouget and @naoshigeuchida.bsky.social exploring how dopamine neurons could enable multi-timescale reinforcement learning in the brain is out in @nature.com www.nature.com/articles/s41...
nature.com
Multi-timescale reinforcement learning in the brain - Nature
Individual dopaminergic neurons encode future rewards over distinct temporal horizons.
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Shih-Chieh Lin @sclin-lab.bsky.social · 23/05/2025
Great work from my next door neighbor!
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Ching-Lung Hsu @hiallen72.bsky.social · 22/05/2025
Big Congratulations Tsai-Wen! www.nature.com/articles/s41...
nature.com
Imaging neuronal voltage beyond the scattering limit - Nature Methods
ALI is an approach for analyzing voltage imaging data that is inspired by algorithms used in super-resolution microscopy. It allows resolving the activity of single neurons in densely labeled populati...
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Shih-Chieh Lin @sclin-lab.bsky.social · 23/05/2025
Not sure about the question. Doesn’t hallucination, by definition, mean that the subject is unaware? I am sure @kepecslab.bsky.social would have a better answer.
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Shih-Chieh Lin @sclin-lab.bsky.social · 23/05/2025
Something like this? www.science.org/doi/abs/10.1...
science.org
Striatal dopamine mediates hallucination-like perception in mice
A mouse behavioral model of hallucinations yields circuit-level insights into the dopamine hypothesis of psychosis.
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Hugo Spiers @hugospiers.bsky.social · 15/05/2025
Impressive study in @nature from my colleague Marcus Stephenson-Jones at UCL in the @sainsburywellcome.bsky.social www.nature.com/articles/s41...
nature.com
Dopaminergic action prediction errors serve as a value-free teaching signal - Nature
Dopaminergic action prediction error signals are used by mice as a value-free teaching signal to reinforce stable sound–action associations in the tail of the striatum.
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Marino Pagan @marinopagan.bsky.social · 21/03/2025
1/7 Our paper on individual variability in decision-making is finally out in @nature.com! Inspired by the classic work by Mante and Sussillo, we trained many rats to solve context-dependent decision-making, and we found that different brains use different neural mechanisms to solve the same task!
nature.com
Individual variability of neural computations underlying flexible decisions - Nature
Behavioural experiments to study decision-making in response to context-dependent accumulation of evidence provide testable models that are consistent with the heterogeneity in neural signatures among...
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Shih-Chieh Lin @sclin-lab.bsky.social · 17/05/2025
This looks awesome and very valuable for the study of basal forebrain. Anything in particular you are looking to characterize? We are very interested in GABAergic basal forebrain neurons and would love to know how rodent and human BF are conserved or differ.
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Shih-Chieh Lin @sclin-lab.bsky.social · 11/04/2025
Congrats to @kepecslab.bsky.social !
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Shih-Chieh Lin @sclin-lab.bsky.social · 05/03/2025
Beautiful work. Congratulations!
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Jeremy Berg @jeremymberg.bsky.social · 16/02/2025
Some glimmers of hope (but mostly confusion) this morning. I have heard that no intramural tenure track investigators were supposed to be on the termination list although some folks clearly got termination notices. I am actively checking into this every way I can. 1/2
media.tenor.com
a picture of a pikachu with the words " i still have hope " written below it
ALT: a picture of a pikachu with the words " i still have hope " written below it
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Shih-Chieh Lin @sclin-lab.bsky.social · 16/02/2025
This is atrocious!
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John Tuthill @tuthill.bsky.social · 31/01/2025
Very interesting paper on a potential role for proprioceptors in sensing muscle acidosis and driving the perception of soreness. "Sng" is a Taiwanese word for both sour taste and muscle soreness. It also imitates the natural vocalization of humans feeling sore. www.science.org/doi/10.1126/...
science.org
A role for proprioceptors in sngception
Proprioceptors mediate acidosis sensation that contributes to acid-induced pain chronicity.
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David G. Clark @david-g-clark.bsky.social · 29/01/2025
(1/30) New preprint! "Symmetries and continuous attractors in disordered neural circuits" with Larry Abbott and Haim Sompolinsky bioRxiv: www.biorxiv.org/content/10.1...
biorxiv.org
Symmetries and Continuous Attractors in Disordered Neural Circuits
A major challenge in neuroscience is reconciling idealized theoretical models with complex, heterogeneous experimental data. We address this challenge through the lens of continuous-attractor networks...
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Shih-Chieh Lin @sclin-lab.bsky.social · 25/01/2025
Congratulations Dayu!
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Blake Richards @tyrellturing.bsky.social · 03/01/2025
Two papers out showing that thalamic inputs determine how cortex responds to a hierarchical task with rule switching: www.nature.com/articles/s41... journals.plos.org/plosbiology/... 🧠📈 🧪
nature.com
Prefrontal transthalamic uncertainty processing drives flexible switching - Nature
By examining neural responses from tree shrews performing hierarchical decision tasks with rule reversals, the authors identify a thalamocortical mechanism for regulating cognitive flexibility.
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The Transmitter @thetransmitter.bsky.social · 18/12/2024
These essays offer the neuroscience community a place to explore the culture and practice of the field; to debate major questions; to examine the craft of neuroscience; and to trace its evolution over time. Download the book now: www.thetransmitter.org/transmitter-...
thetransmitter.org
The Transmitter books
The Transmitter’s first book, “Thinking about neuroscience: Essays from the field,” features a rich collection of writing from researchers Nicole Rust, Anthony Zador and many more.
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Clément Pouget @clementpouget.bsky.social · 13/12/2024
Our preprint of my PhD’s work in @gisellavetere.bsky.social lab is finally out on BiorXiv: doi.org/10.1101/2024..., and I’m so excited to share it! If you’ve ever wondered about reconciling engram manipulation experiments and neuronal activity during encoding, you’re on the right thread! 1/14
doi.org
Deconstruction of a memory engram reveals distinct ensembles recruited at learning
How are associative memories formed? Which cells represent a memory, and when are they engaged? By visualizing and tagging cells based on their calcium influx with unparalleled temporal precision, we ...
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