Aaron Fleischer
neuroendoawf.bsky.social
Aaron Fleischer
@neuroendoawf.bsky.social
Neuro grad student in the Frick Lab @uwm. 🚨LOOKING FOR POSTDOC LAB NOW🚨 Dabbles in learning and memory, hormones, and sex differences and similarities. Fan of dogs, climbing, and running. He/him. All views presented here are my own.
Reposted by Aaron Fleischer
So excited to see our latest paper out today in @natcomms.nature.com! Studies led by the amazing @margestelzner.bsky.social www.nature.com/articles/s41.... VTA GABA neurons have a unique role in economic decision making - they integrate reward seeking motivation and the current cost of seeking
Ventral tegmental area GABA neurons integrate positive and negative valence - Nature Communications
The role of ventral tegmental area GABA neurons in behavior is unclear. Here, authors show that VTA GABA but not dopamine neurons integrate positive and negative valence to encode motivational conflic...
www.nature.com
November 24, 2025 at 4:18 PM
Day 129. Monday, again? No thank you. I’ll take Luna’s advice and just sleep instead. #UglyDogs
November 24, 2025 at 1:51 PM
Day 128. Izzie has changed her name to Simba. Not sure why, but we will honor her request. #UglyDogs
November 23, 2025 at 2:13 PM
Reposted by Aaron Fleischer
Another win!
November 22, 2025 at 5:56 AM
Reposted by Aaron Fleischer
I tried an even harder example on Gemini Pro image generation and this is quite scary/amazing. I asked for a microscopy image of around 20 HeLa cells, GFP tagged 20% nuclear, 10% membrane, +1 nuclear staining, + overlap. Image below and prompt in the following post.
November 21, 2025 at 5:32 PM
Reposted by Aaron Fleischer
Excellent analysis of the COVID response in the UK & Europe.

Some questionable appraisal of Sweden, without considering comparisons with NZ, Australia - or indeed Finland, Denmark, & Norway.

Many countries minimized COVID deaths AND minimized lockdown, by reducing infections.
November 22, 2025 at 9:26 PM
Day 127. Luna demands you find as much joy as possible in your Saturday! #UglyDogs
November 22, 2025 at 3:15 PM
Reposted by Aaron Fleischer
We are living in the stupidest period of US history and this is saying something.
GOP Sen. Ron Johnson is crowing about Robert Kennedy Jr.’s CDC pushing debunked vaccine misinformation.

“Time to apologize to Dr. Andrew Wakefield and all the others who were maligned and vilified for simply asking the right questions,” he says.

Wakefield’s paper was *fraudulent.*
November 21, 2025 at 8:13 PM
Reposted by Aaron Fleischer
“This is how the wellness influencer industry works,” Hotez said. “It’s not enough to push the snake oil. You have to discredit mainstream biomedical science and portray scientists as public enemies or cartoon villains, and that's what Kennedy’s seeking to do.”
November 21, 2025 at 12:33 PM
Reposted by Aaron Fleischer
would really love it if our elected officials had to publicly define socialism and then explain why they voted against it
November 21, 2025 at 5:57 PM
Day 126. Izzie is deep in thought today. What day is it, she asks. Friday, I reply. Why not Saturday, she asks. Why work when you could stay home? Also is that pet clone behind me again? Good questions, Izzie. Good questions. #UglyDogs
November 21, 2025 at 4:12 PM
Reposted by Aaron Fleischer
Can’t believe the whole country has to suffer through the return of Dickensian childhood diseases because the worst, most ignorant attention-demanders decided other people’s expertise makes them feel bad
November 20, 2025 at 4:19 AM
Reposted by Aaron Fleischer
LOVED this paper from @constantinoplelab.bsky.social showing how estrogen modulates reinforcement learning in @natureportfolio.nature.com

Was also stoked to write the commentary for this paper with our superstar postdoc Masa Taira.

Check it out 👇 🧠🧪
Bonus on this paper:
there is also a commentary from Masakazu Taira & @melissajsharpe.bsky.social that is certainly worth reading-
www.nature.com/articles/s41...

#RewardSignals #neuroskyence
November 20, 2025 at 10:21 PM
Reposted by Aaron Fleischer
Thank you to everyone who came out to #MCCS25 last week! It was great to hear all the exciting research happening in the field of molecular and cellular cognition 🧠

🤓 A special thank you to all our incredible speakers for sharing their work!

Don't forget to join our mailing list: bit.ly/4r1YApk
November 20, 2025 at 3:48 PM
Reposted by Aaron Fleischer
I thought I was disappointed in my tenured colleagues before but now I am really angry. ICE Actions Mean our UNC students
are afraid to come to class or headed home to help affected families. It's time to SPEAK UP and instead I hear a resounding SILENCE
November 20, 2025 at 5:36 PM
Reposted by Aaron Fleischer
The President of the United States just called for Democratic members of Congress to be executed. "HANG THEM", he posted.

If you're a person of influence in this country and you haven't picked a side, maybe now would be the time to pick a fucking side.
November 20, 2025 at 4:15 PM
Reposted by Aaron Fleischer
Before the midterms of 1866, President Andrew Johnson called his congressional opponents traitors and said they should be hanged.

Voters were so profoundly moved by his words... that they gave his opponents a supermajority in Congress, and the nation got the Fourteenth Amendment.
November 20, 2025 at 3:33 PM
Reposted by Aaron Fleischer
ICYMI: Yesterday, the CDC updated its vaccine safety page to say that vaccines might cause autism (they don’t) and that the science isn’t settled (it is).

For substantiation, the page links out to several studies by anti-vax allies of HHS Robert Kennedy Jr.
www.importantcontext.news/p/cdc-change...
CDC Updates Vaccine Safety Page to Promote Vaccine Misinformation, Cites Kennedy’s Anti-Vax Allies
It is the latest move by Robert Kennedy Jr.’s Department of Health and Human Services to undermine vaccines.
www.importantcontext.news
November 20, 2025 at 3:06 PM
Reposted by Aaron Fleischer
Earlier this morning, President Trump threatened me and a group of service and veteran Members of Congress with arrest, trial, and death by hanging.

Here’s my response:
November 20, 2025 at 6:19 PM
Reposted by Aaron Fleischer
Trump gets a pass on violent rhetoric, and he shouldn't. Calling the police is the correct response. Journalists should also take this seriously, demanding explanations and accountability from the White House, instead of pretending this is just a Thursday.
Important: House Dem leaders just said Trump's call for execution of Dems has prompted them to contact US Capitol Police and House Sergeant at Arms to "ensure the safety of these members and their families."

Treat Trump like an unhinged menace. He's weak and in deep political trouble. Don't let up.
November 20, 2025 at 5:24 PM
Reposted by Aaron Fleischer
We want to speak directly to members of the Military and the Intelligence Community.

The American people need you to stand up for our laws and our Constitution.

Don’t give up the ship.
November 18, 2025 at 1:31 PM
Reposted by Aaron Fleischer
I want to give my support to all of the CDC employees who are losing their minds about the false claims that vaccines cause autism that now grace their website, thanks to RFK Jr.

There are many excellent career scientists there that cannot stop what RFK Jr. puts out. He is simply out of control.
November 20, 2025 at 2:48 PM
Reposted by Aaron Fleischer
In 1988, @relenski.bsky.social started a long-term evolution experiment with 12 flasks of E. coli, and it's still going on

‘Evolution under a microscope’ going strong at MSU
The Long-Term Evolution Experiment continues to reveal how chance and adaptations intertwine🧪
natsci.msu.edu/news/2025/20...
November 20, 2025 at 2:03 PM
Day 125. I actually don’t know what’s going on behind Luna’s eyes today, sorry. Whatever it is, it’s very cute though. #UglyDogs
November 20, 2025 at 2:47 PM