Lucas C Parra
@lcparra.bsky.social
NeuroAI, applied neuroscience, machine learning, brain stimulation, neural signals, medical imaging - physicist by training.
parralab.org
parralab.org
Reposted by Lucas C Parra
What is the most profitable industry in the world, this side of the law? Not oil, not IT, not pharma.
It's *scientific publishing*.
We call this the Drain of Scientific Publishing.
Paper: arxiv.org/abs/2511.04820
Background: doi.org/10.1162/qss_...
Thread @markhanson.fediscience.org.ap.brid.gy 👇
It's *scientific publishing*.
We call this the Drain of Scientific Publishing.
Paper: arxiv.org/abs/2511.04820
Background: doi.org/10.1162/qss_...
Thread @markhanson.fediscience.org.ap.brid.gy 👇
November 12, 2025 at 10:31 AM
What is the most profitable industry in the world, this side of the law? Not oil, not IT, not pharma.
It's *scientific publishing*.
We call this the Drain of Scientific Publishing.
Paper: arxiv.org/abs/2511.04820
Background: doi.org/10.1162/qss_...
Thread @markhanson.fediscience.org.ap.brid.gy 👇
It's *scientific publishing*.
We call this the Drain of Scientific Publishing.
Paper: arxiv.org/abs/2511.04820
Background: doi.org/10.1162/qss_...
Thread @markhanson.fediscience.org.ap.brid.gy 👇
Reposted by Lucas C Parra
I had ZERO idea this was the reality.
What is the most profitable industry in the world, this side of the law? Not oil, not IT, not pharma.
It's *scientific publishing*.
We call this the Drain of Scientific Publishing.
Paper: arxiv.org/abs/2511.04820
Background: doi.org/10.1162/qss_...
Thread @markhanson.fediscience.org.ap.brid.gy 👇
It's *scientific publishing*.
We call this the Drain of Scientific Publishing.
Paper: arxiv.org/abs/2511.04820
Background: doi.org/10.1162/qss_...
Thread @markhanson.fediscience.org.ap.brid.gy 👇
November 12, 2025 at 1:06 PM
I had ZERO idea this was the reality.
Reposted by Lucas C Parra
Please take a minute to scroll through this—and share it.
It's the story of our time.
The Authoritarian Stack: How Tech Billionaires Are Building a Post-Democratic American—And Why Europe Is Next.
www.authoritarian-stack.info
It's the story of our time.
The Authoritarian Stack: How Tech Billionaires Are Building a Post-Democratic American—And Why Europe Is Next.
www.authoritarian-stack.info
The Authoritarian Stack
How Tech Billionaires Are Building a Post-Democratic America — And Why Europe Is Next
www.authoritarian-stack.info
November 5, 2025 at 11:36 PM
Please take a minute to scroll through this—and share it.
It's the story of our time.
The Authoritarian Stack: How Tech Billionaires Are Building a Post-Democratic American—And Why Europe Is Next.
www.authoritarian-stack.info
It's the story of our time.
The Authoritarian Stack: How Tech Billionaires Are Building a Post-Democratic American—And Why Europe Is Next.
www.authoritarian-stack.info
Reposted by Lucas C Parra
Today we celebrate the birthday of not one, but two amazing women in science! 🤗🎉Marie Skłodowska-Curie (1867), who discovered #radium & #polonium & pioneered #radioactivity, & Lise Meitner (1878), whose brilliance uncovered the physics behind #nuclearfission. Happy birthday, trailblazers! ✨
November 7, 2025 at 1:10 PM
Today we celebrate the birthday of not one, but two amazing women in science! 🤗🎉Marie Skłodowska-Curie (1867), who discovered #radium & #polonium & pioneered #radioactivity, & Lise Meitner (1878), whose brilliance uncovered the physics behind #nuclearfission. Happy birthday, trailblazers! ✨
Reposted by Lucas C Parra
A reminder:
NSF makes you say who you got conflicts (coauthored) with. We (really just Jordan Matelsky) just built you a tool for that. Literally one click: bib.experiments.kordinglab.com/nsf-coa
NSF COA | Jordan Matelsky
bib.experiments.kordinglab.com
November 4, 2025 at 12:07 PM
A reminder:
Reposted by Lucas C Parra
Happy Halloween
October 31, 2025 at 10:35 PM
Happy Halloween
Reposted by Lucas C Parra
15 million Americans are going to lose their health care.
October 31, 2025 at 10:04 PM
15 million Americans are going to lose their health care.
Reposted by Lucas C Parra
People emphasizing circles in dimensionality reduced trajectories are emphasizing the wrong thing imho. In a spatiotemporally low-pass world, dimensionality reduction literally reveals the fourier bases.
To get back on track after a distraction, the brain appears to employ a rotating traveling wave, a new study by the lab of @earlkmiller.bsky.social finds. picower.mit.edu/news/after-d... @mitbcs.bsky.social #neuroscience #cognition
After distractions, rotating brain waves may help thought circle back to the task
To get back on track after a distraction, the cortex appears to employ a rotating traveling wave, a new study by MIT neuroscientists finds.
picower.mit.edu
October 31, 2025 at 1:13 PM
People emphasizing circles in dimensionality reduced trajectories are emphasizing the wrong thing imho. In a spatiotemporally low-pass world, dimensionality reduction literally reveals the fourier bases.
Reposted by Lucas C Parra
Scans shed light on changes in brain when we zone out while tired.
Study finds lapses of attention in sleep-deprived people coincide with wave of cerebrospinal fluid flowing out of the brain.
🧪🧠 #neuroskyence
www.theguardian.com/science/2025...
Study finds lapses of attention in sleep-deprived people coincide with wave of cerebrospinal fluid flowing out of the brain.
🧪🧠 #neuroskyence
www.theguardian.com/science/2025...
Scans shed light on changes in brain when we zone out while tired
Study finds lapses of attention in sleep-deprived people coincide with wave of fluid flowing out of the brain
www.theguardian.com
October 29, 2025 at 2:23 PM
Scans shed light on changes in brain when we zone out while tired.
Study finds lapses of attention in sleep-deprived people coincide with wave of cerebrospinal fluid flowing out of the brain.
🧪🧠 #neuroskyence
www.theguardian.com/science/2025...
Study finds lapses of attention in sleep-deprived people coincide with wave of cerebrospinal fluid flowing out of the brain.
🧪🧠 #neuroskyence
www.theguardian.com/science/2025...
Reposted by Lucas C Parra
The NIH institute director firing last Friday is very bad.
I made a video explainer about why.
Stay for last post, w link to @science.org story from @jocelynkaiser.bsky.social
1/4
🧪
I made a video explainer about why.
Stay for last post, w link to @science.org story from @jocelynkaiser.bsky.social
1/4
🧪
October 23, 2025 at 4:02 AM
The NIH institute director firing last Friday is very bad.
I made a video explainer about why.
Stay for last post, w link to @science.org story from @jocelynkaiser.bsky.social
1/4
🧪
I made a video explainer about why.
Stay for last post, w link to @science.org story from @jocelynkaiser.bsky.social
1/4
🧪
Reposted by Lucas C Parra
It’s not the thought that counts: Allostasis at the core of brain function
www.cell.com/neuron/fullt...
#neuroscience
www.cell.com/neuron/fullt...
#neuroscience
It’s not the thought that counts: Allostasis at the core of brain function
The authors review evidence that the primary function of the brain, supported by distributed
neural systems, is the predictive regulation of physiology (i.e., allostasis). An
example from Alzheimer’s ...
www.cell.com
October 18, 2025 at 1:54 PM
It’s not the thought that counts: Allostasis at the core of brain function
www.cell.com/neuron/fullt...
#neuroscience
www.cell.com/neuron/fullt...
#neuroscience
Reposted by Lucas C Parra
We talk about an “attention crisis,” blaming poor academic performance on students’ attention deficits.
But are long-term traits (ADHD symptoms) really to blame? Or is it our immediate focus?
We test this - by measuring brain-to-brain synchrony as students learned from short educational videos. 🧠
But are long-term traits (ADHD symptoms) really to blame? Or is it our immediate focus?
We test this - by measuring brain-to-brain synchrony as students learned from short educational videos. 🧠
October 16, 2025 at 7:13 PM
We talk about an “attention crisis,” blaming poor academic performance on students’ attention deficits.
But are long-term traits (ADHD symptoms) really to blame? Or is it our immediate focus?
We test this - by measuring brain-to-brain synchrony as students learned from short educational videos. 🧠
But are long-term traits (ADHD symptoms) really to blame? Or is it our immediate focus?
We test this - by measuring brain-to-brain synchrony as students learned from short educational videos. 🧠
iai.tv/articles/eme...
Is "Emergence" really good for nothing? Or is this just a debate about semantics?
philpapers.org/archive/HEIT...
Is "Emergence" really good for nothing? Or is this just a debate about semantics?
philpapers.org/archive/HEIT...
Emergence explains nothing and is bad science | John Heil
iai.tv
October 14, 2025 at 12:51 PM
iai.tv/articles/eme...
Is "Emergence" really good for nothing? Or is this just a debate about semantics?
philpapers.org/archive/HEIT...
Is "Emergence" really good for nothing? Or is this just a debate about semantics?
philpapers.org/archive/HEIT...
Reposted by Lucas C Parra
One of my two last (ever) papers on tDCS:
Does anodal tDCS over M1 really enhance motor sequence learning? A non-replication of earlier findings in a double-blind, pre-registered large-sample study in humans
www.medrxiv.org/content/10.1...
Does anodal tDCS over M1 really enhance motor sequence learning? A non-replication of earlier findings in a double-blind, pre-registered large-sample study in humans
www.medrxiv.org/content/10.1...
Does anodal tDCS over M1 really enhance motor sequence learning? A non-replication of earlier findings in a double-blind, pre-registered large-sample study in humans
Background Transcranial direct current stimulation (tDCS) is one of the most widely used noninvasive neuromodulation methods. Despite its popularity, some recent studies highlighted issues about the r...
www.medrxiv.org
October 11, 2025 at 9:35 AM
One of my two last (ever) papers on tDCS:
Does anodal tDCS over M1 really enhance motor sequence learning? A non-replication of earlier findings in a double-blind, pre-registered large-sample study in humans
www.medrxiv.org/content/10.1...
Does anodal tDCS over M1 really enhance motor sequence learning? A non-replication of earlier findings in a double-blind, pre-registered large-sample study in humans
www.medrxiv.org/content/10.1...
Faculty position in Biomedical Engineering in New York City at our lovely campus. Please re-post!
cuny.jobs/new-york-ny/...
cuny.jobs/new-york-ny/...
Jobs | City University of New York
cuny.jobs
October 9, 2025 at 9:11 PM
Faculty position in Biomedical Engineering in New York City at our lovely campus. Please re-post!
cuny.jobs/new-york-ny/...
cuny.jobs/new-york-ny/...
Reposted by Lucas C Parra
M1, not so low-d after all:
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
September 8, 2025 at 8:51 PM
M1, not so low-d after all:
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
And 93 of mine ...
They used 51 of my papers...
Just a reminder to check for your name in this list of books that OpenAI trained from. If your name is there, they probably owe you several thousand dollars.
OpenAI cried that if everyone eligible author files, the company will go bankrupt, so I'm alerting every author I have ever spoken to.
OpenAI cried that if everyone eligible author files, the company will go bankrupt, so I'm alerting every author I have ever spoken to.
September 7, 2025 at 8:58 PM
And 93 of mine ...
This is a very impressive system. Ultrasound brain stimulation with 256 transduces and simultaneous fMRI. Results suggest focal stimulation of LGN, a visual nucleolus deep inside the brain.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Ultrasound system for precise neuromodulation of human deep brain circuits - Nature Communications
Modulating deep brain structure can lead to therapies for neurological conditions. Here, the authors show a transcranial ultrasound stimulation (TUS) system featuring a 256-element helmet-shaped trans...
www.nature.com
September 7, 2025 at 2:54 PM
This is a very impressive system. Ultrasound brain stimulation with 256 transduces and simultaneous fMRI. Results suggest focal stimulation of LGN, a visual nucleolus deep inside the brain.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Lucas C Parra
Reposted by Lucas C Parra
The time between fucking around and finding out for messing with the climate and environment is long, and attribution is sometimes difficult. So conservative politicians have gotten away with appointing imbeciles to positions of power in these areas. However, no such luck for them in public health.
Opinion | Bernie Sanders: Kennedy Must Resign
www.nytimes.com
August 31, 2025 at 10:20 AM
The time between fucking around and finding out for messing with the climate and environment is long, and attribution is sometimes difficult. So conservative politicians have gotten away with appointing imbeciles to positions of power in these areas. However, no such luck for them in public health.
Reposted by Lucas C Parra
This rule would have meant I couldn't do my Ph.D. in America.
I did do it in America. Became a professor. 12 thriving U.S. labs are now headed by trainees from my research lab. Like me, they are all working hard to enrich American knowledge and society.
With this self-harming rule, none of that.
I did do it in America. Became a professor. 12 thriving U.S. labs are now headed by trainees from my research lab. Like me, they are all working hard to enrich American knowledge and society.
With this self-harming rule, none of that.
Trump admin planning to change student visas from lasting for duration of academic program to fixed 4-yr term, and then much harder to renew
Could destroy US ability to attract global talent, particularly those seeking advanced degrees in STEM. The median time to complete a PhD is 5.7 yrs per NSF.
Could destroy US ability to attract global talent, particularly those seeking advanced degrees in STEM. The median time to complete a PhD is 5.7 yrs per NSF.
Trump Deals A New Immigration Blow To International Students
Trump officials have proposed a new rule limiting international students to fixed periods of entry, making a U.S. education more precarious.
www.forbes.com
August 29, 2025 at 11:48 PM
This rule would have meant I couldn't do my Ph.D. in America.
I did do it in America. Became a professor. 12 thriving U.S. labs are now headed by trainees from my research lab. Like me, they are all working hard to enrich American knowledge and society.
With this self-harming rule, none of that.
I did do it in America. Became a professor. 12 thriving U.S. labs are now headed by trainees from my research lab. Like me, they are all working hard to enrich American knowledge and society.
With this self-harming rule, none of that.
Reposted by Lucas C Parra
Bernie Sanders: Kennedy Must Resign www.nytimes.com/2025/08/30/o...
Opinion | Bernie Sanders: Kennedy Must Resign
www.nytimes.com
August 30, 2025 at 3:03 PM
Bernie Sanders: Kennedy Must Resign www.nytimes.com/2025/08/30/o...
Reposted by Lucas C Parra
Delighted to share our work on replay and successor representations! We find replay during very short task pauses in human visual cortex that is linked to learning SRs & happens when learning is implicit. Study led by @lnnrtwttkhn.bsky.social
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
Replay in the human visual cortex during brief task pauses is linked to implicit learning of successor representations | PNAS
Humans can implicitly learn about multistep sequential relationships between events
in the environment from their statistical co-occurrence. Theore...
www.pnas.org
August 22, 2025 at 4:43 PM
Delighted to share our work on replay and successor representations! We find replay during very short task pauses in human visual cortex that is linked to learning SRs & happens when learning is implicit. Study led by @lnnrtwttkhn.bsky.social
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...
#compneuro #neuroskyence
www.pnas.org/doi/10.1073/...