A nice highlight of @zeenarivera.bsky.social's PR with reset task! www.eneuro.org/content/13/2...
12.02.2026 18:47
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A nice highlight of @zeenarivera.bsky.social's PR with reset task! www.eneuro.org/content/13/2...
Zeena talking in front of a projection of their first author paper in eNeuro, microphone in hand.
First panel talk was a success ✅ #WinterBrain #WCBR2026
neuroscience rlly be like
but what if.................box
I've been doing research on particular schedules of intermittent reinforcement for a minute now and it's only dawned on me like /yesterday/ that the reason why we get such a big uptick in operant papers in the early 90s is bc MedAssociates releases their user programmable boxes in like 88'
I spend a non-trivial amount of time playing a game in my head when I'm idling around for experiments to finish where I imagine two flavors and then imagine what they'd taste like together. taste models?
$15k stipend to support 9 weeks of full time summer research!
For rising juniors/seniors who are able to travel to and obtain housing at the location of the lab they are placed in!
I did an HHMI summer experience in 2013 and it changed everything for me! Apply…or tell someone to apply!
🧪🧠
thanks 2 everyone who made the time to stop by 🥲
if you missed it (or you want to reminisce lol) it's also up on @sfnjournals.bsky.social #eNeuro #sfn #sfn2025
right here: www.eneuro.org/content/12/1...
Zeena holding up their poster tube in front of their face and looking to the right
come thru for my poster at HH2 from now-ish to 5 today thx @sfn.org #sfn #sfn2025
a very blurry picture of a sheet with the words "SFN Friends Bingo" on it with a cute axolotol and frog and rat on it. Behind are some booths at society for neuroscience 2025
the prize for bingo is friendship 🥰 #sfn2025 #sfn
i'm making sure I say hi to people I don't get to see too often @sfn.org
Looking forward to SfN in San Diego ☀️ Come visit our posters and Nano talk!
Please help spread the word to all who will be in San Diego on Sunday, Nov. 16th. As part of SFN, SFN's scicomm arm is sponsoring an event.
It's me, Shrek Chalasani (Salk), Kumar Narayanan (UIowa) and the brainfacts.org team. Short talks; trivia; lots of fun. Join us!
It's free. Register here.
All the artists showing work at #SfN25, now with pictures! #sciart
Really disappointing that our #NIH colleagues will NOT be at @sfn.org this year, will NOT be discussing science, will NOT be advising us on grants, will NOT be sharing results or advancing research. 🤐
It's conference season! #SfN2025
See my poster from the @aliciaizquierdo.bsky.social and Wikenheiser labs @sfn.org on Tuesday @ 1-3pm.
☀️ DM me to meet up in beautiful San Diego ☀️
(4/4) I'm doing a couple more experiments before I finish up my PhD & oooweee it's nice to use a task that rats learn quickly w/ a lot of interesting outputs.
Work done in part thanks to @hhmi.org w/ the best collab btwn @aliciaizquierdo.bsky.social & Andrew Wikenheiser. best co-mentorship eva!
Rats' strategies were correlated with, but systematically greater than, the optimal bout length. The model-determined optimal bout length is plotted against the median bout length observed in each session. Observed bout length was strongly correlated with the model-predicted optimal bout length. However, nearly all points fall above the dashed unity line, indicating that rats frequently performed longer bouts than predicted by the model. Histograms along the x- and y-axis show density estimates computed separately for 60 s and 10 s reset delay data.
(3/4) A couple years back, Andrew and I were talking about how PR, given a consistent work rate, kinda looked like a depleting patch (re: foraging). Now, applying optimality modeling, we find that our rats "overharvest" similarly to (other) patch-leaving tasks 🤯.
Ratio resets segmented PRR task performance into bouts of work. Cumulative records of active lever presses are plotted for the first 800 s of three example sessions. Grey tick marks indicate reward delivery times. (A) In PR task sessions, rats earned reinforcers quickly at the beginning of sessions, but reward rate decreased as the ratio requirement progressed. Example record from session 2 of PR. In PRR sessions (B–C), lever pressing was segmented into bouts by ratio resets, which resulted in the reset delay (shaded regions). Example records of session 2 PRR-60 (B) and session 2 PRR-10 (C). Because reset presses returned the ratio requirement to one, cumulative records for PRR-10 and PRR-60 sessions were computed separately for each bout of work between successive ratio resets. Note the very different y-axes between the three example sessions.
(2/4) Bout (length of time pressing for reward between no-access delay periods) length & frequency are sensitive to delay length. ***Note, the differences in the y-axis.
Rats were tested on the Progressive Ratio with Resets (PRR) task where 2 levers are present in an operant box. In this example, the left-side lever allows for the rat to do progressive ratio (PR) which starts at a requirement of 1 lever press & increases by 1 lever press. to earn reward (one 45mg sucrose pellet delivered in a hopper). The right-side lever resets the ratio requirement after a fixed reset delay where they cannot press either lever. Rats can press this lever at any point during PR. In PRR-10 sessions the reset delay was 10 seconds, while in PRR-60 sessions the reset delay was 60 seconds.
(1/4) TL;(please still)R on #eNeuro
Rats can reset PR to its easiest difficulty by paying a delay cost on PRR task. They adaptively use the reset lever to go from receiving ~67 pellets (PR) ➡ ~210 pellets (PRR w/60s delay)➡ ~328 pellets (PRR w/10s delay; almost 15g 😳) w/in the same amount of time.
Next @zeenarivera.bsky.social from UCLA for the first blitz talk on a progressive ratio task using effort.
Had to change all of my "in press" citations in this talk this morning 🤩 #MechanisticBasisOfForaging2025
www.eneuro.org/content/earl...
any other neuroscientists with narcolepsy out there?
What a great lineup of speakers! Glad that @hhmi.org Gilliam Fellow @zeenarivera.bsky.social will present a blitz talk next week 🇬🇧 👏🏼 (data from a collab with the Wikenheiser lab)
🚨Registration for Mechanistic Basis of Foraging 2025 closes October 20th 🚨
Speakers
@mkflugge.bsky.social @aaronbornstein.bsky.social @benhayden.bsky.social @ellileadbeater.bsky.social
@davidrobbe.bsky.social @dlbarack.bsky.social @becketebs.bsky.social
uobevents.eventsair.com/the-mechanis...
This means individuals in the following statuses at the time of application are eligible: Undergraduate in the final (senior) year of a bachelor’s degree program Bachelor’s degree-holder with NO enrollment in a graduate degree program (non-degree graduate coursework allowed) Individual enrolled in a joint bachelor’s-master’s degree program with at least three undergraduate years completed First-year graduate student in their first graduate degree program with less than one academic year completed in the degree program (according to institution’s academic calendar) Individuals enrolled in joint bachelor’s-master’s degree programs are considered graduate students. For GRFP, joint bachelor’s-master’s degrees are defined as degrees concurrently pursued and awarded. Not be a current NSF employee. Applications that do not meet eligibility requirements will be returned without review as being ineligible for a fellowship.
2/2
www.latimes.com/california/s...
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Congrats! Very exciting work
😮
remember when emily came in clutch to be my independent study professor after i dropped out of a required senior seminar class in my humanities college in progressive seattle where some of my peers referred to the filipino & the mexican students as The Colored people 🤪
preorder her book already !!!
and definitely won't be ur last ❤️ proud of u
