Charan Ranganath
@CharanRanganath
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Author WHY WE REMEMBER @doubledaybooks @faberbooks Professor @ucdaviscns @ucd_map Music
Davis, CA
Joined September 2012
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#CoverDrop
!!! for my book WHY WE REMEMBER , now available for pre-order from
@doubledaybooks
, due out February 2024.
#WhyWeRemember
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During pandemic I was struck by the importance of scientific communication, so I decided to write a book about memory. It's been incredibly challenging & exciting. Will continue writing over the next year. Thanks
@doubledaybooks
@Idea_Architects
&
@FaberBooks
!
We are so pleased to announce a new book THE SECRET WORLD OF MEMORY by
@CharanRanganath
coming from the wonderful
@doubledaybooks
team Spring 2023!
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Can't believe I get to share this news:
#WhyWeRemember
has landed on the
@nytimesbooks
#bestsellers
list in its first week. Thank you again to everyone who made this dream come true!
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Anne Treisman didn't publish a lot of papers but each one was authoritative, bulletproof, and thoughtful. A great model for what our field needs today.
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Long after his passing, I often think about Howard Eichenbaum. Dug up one of his characteristically supportive emails after I gave a lousy talk: "I wanted to say that your talk was great and a wonderful compliment to my own - we should go on the road as a comedy team!" 1/3
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I spend a lot of time worrying about the enormous challenges facing trainees these days, but fortunately some good news--
@abarnettPhD
will be an Assistant Professor at University of Toronto Psychology, and my former lab manager
@helleryeahz
just got tenure at University of Miami!
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It always drives me crazy that people credit H.M., rather than Milner, for teaching us about the neural mechanisms of memory. Milner was studying temporal lobectomy patients prior to her work with H.M. and her work would have changed the game no matter what.
Dr. Brenda Milner. A towering figure in neuropsychology for over half a century and my academic grandmother. Amongst her many achievements, I just learned from this article, she survived the Spanish flu as a girl and COVID - twice at 104 years old.
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@tmorello
Sorry, it is misleading to compare Trump to anyone in terms of corruption and negligence. Memes like this spread the "both sides are bad" fallacy that has enabled Trump to destroy America over the past 4 years.
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Every day, a lot of science comes out, and maybe once every 5-10 years someone does the hard work of reading all that stuff, doing some critical thinking and makes sense of it. This paper from Williams, Ford, & Kensinger is a great example.
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If i die soon here is my epitaph:
There is no difference between mechanistic and descriptive
There is no such thing as an engram
Optogenetics isn’t causal
He loved his family, cat, dog, and guitar
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This paper from
@TheColeLab
is a tour de force, bringing together fMRI functional connectivity, neural network models, and behavior into a single framework.
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FYI, I'll likely be recruiting a PhD student to work on computational modeling and fMRI studies of cortico-hippocampal networks and memory for naturalistic events. We have a diverse, collaborative, and dynamic memory lab:
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How the hell is it that marijuana, psilocybin, and MDMA are federally illegal because of possibility for self-harm, & AR-15s are legal, despite the fact that their only use is to harm others in the service of terrorism?
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Last week I started a total reorganization of my Undergrad Learning and Memory course lectures--I'm now completely integrating neuroscience w/cognitive stuff, instead of having separate sections for each. The research has matured to the point where it has to be taught this way.
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My daughter, home from college, designed and helped me paint this wall so I have an awesome zoom background for 2022 (yes guitars will be mounted again soon)
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Excited to share a preprint of new work from my student
@brendanics1
+
@zreagh
@aidelarazan
@jcrivdeck
& Jeff Zacks: Bridges, not walls: the hippocampus builds narrative memories across distant events [short thread follows]
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OK, this is bothering me, so here's a thread to clarify: "false memory" paradigms like DRM involve memory for *something* that is misattributed to the wrong source. There is a large literature on reality monitoring that speaks to this and related paradigms.
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It is an amazing thing to be able to put a book out in the world and get a reaction like this! Thank you
@CaroSanderson
&
@thebookseller
!!! (note-official UK release of
#whyweremember
in March
@FaberBooks
)
"We aren't supposed to remember everything. In fact we're designed to forget". My
#nonfiction
@thebookseller
Book of the Month for March is this enthralling book about human memory by
@CharanRanganath
@FaberBooks
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Hello, I'm pleased to announce that we *finally* received approval for a job posting in my lab! We are looking to hire a full-time research assistant. Please pass this on to anyone who might be interested. Thanks!
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I'm still on twitter hiatus, but I thought it's worth sharing this. A bit rant-y I'll admit, but hey it's an opinion piece. Thanks to
@LindseyDrayton
for inviting me & putting up with procrastination and bad drafts!
Charan Ranganath asks, “What are the neural and computational principles that give rise to episodic memory?”
@CharanRanganath
Free access until Dec 22:
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After a lot of work, our paper Neural reactivation in parietal cortex enhances memory for episodically linked information out at
@PNASNews
!!
@trjonker
@maureenritchey
@HalleZucker
@AlexDavidClarke
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As someone in an interracial marriage I’m grateful for this. I still remember the weird stares we got traveling across the country even 25 years after this case. But at least we never got arrested or deported. So, happy Loving Day!
Richard and Mildred Loving's marriage was deemed illegal because she was Black and Native American and he was white. Their case went all the way to the Supreme Court. And on June 12, 1967, the couple won. "Loving Day" celebrates the historic ruling.
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Good news with a pending grant, so I will be posting an ad for postdoctoral researcher opening soon. In the meantime, if you know anyone interested in interactions b/w event cognition, attention/perception, and spatial/episodic memory, please have them reach out to me!
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Researching and writing a book takes you on some strange and interesting detours
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I was pleasantly surprised to see this paper highlighted. After months of procrastination, persistent pressure from Howard Eichenbaum led me to seek help from
@ArneEkstrom1
Arne & I hammered it out in about 2 weeks, and had immense fun in the process.
Check out this highlighted paper in
#Hippocampus
.
'Space, time, and episodic memory: The hippocampus is all over the cognitive map' by
@ArneEkstrom1
&
@CharanRanganath
.
(The paper also features in the Hippocampus & Memory Integration special issue!)
🔗
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Sorry I know I've been bragging, but can't help it--just found out that
@ashleybw_neuro
got an R36 Dissertation award from
@NIMHgov
! Reviewers said it was too ambitious (computational neuroscience and empirical studies) but her resilience paid off. ✊
@BlackInNeuro
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I learned of Art Shimamura's death this morning. Still processing it, but here is something for those who didn't know him (thread follows)
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Not a brand new paper, but this review paper is relevant to anyone interested in the role of hippocampus in memory precision, memory integration, sequences/cognitive maps, etc. from
@IvaBrunec
@rosanna_olsen
@morganbarense
et al
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@DonaldJTrumpJr
That’s true you are no Psychology Professor. As someone who actually is one I can tell you it’s not weird at all
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My daughter Mira was one of the five recipients of this prestigious undergraduate research grant! She designed the research project and will collaborate w/
@TheHuntington
on a project that can help guide tree planting in drought stricken urban areas like LA.
Five students in the fields of geology, physics, biochemistry, biology and chemistry have been named Oxy's 2022-23 Science Scholars. 🙌
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It is great to see many people denouncing hate crimes but I implore people to choose words more carefully. Many of the targets of hate in the US are Asian***Americans*** Words matter here because many seem to think that if you're not white that you don't belong in America.
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#PLOSBiology
: Hippocampal cells integrate past memory and present perception for the future
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Thanks so much to all those who made
@LEARNMEM
2023 possible & especially
@manuellayassa
@mike_yassa
! And thanks to all those who said nice thing about my talk, and those who presented their work. For those who missed out, hit us up for pdfs (we'll also get our posters online)
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A herculean effort from a dream team of postdocs and students, I am so proud. I hope our parcellation really helps other researchers to do work that advances our understanding of corticohippocampal interactions in episodic memory
Intrinsic connectivity reveals functionally distinct cortico-hippocampal networks in the human brain--Excited this is finally out!
w/ Walter Reilly
@HalleZucker
@zreagh
@damnmemory
@CharanRanganath
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Happy to share a new preprint from Brendan Cohn-Sheehy &
@aidelarazan
submitted to upcoming special M&C issue edited by
@felipedebrigard
@Muireann_Irish
& Sharda Umanath
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@TheAtlantic
@VPrasadMDMPH
This argument here is silly. Good policy-relevant scientific research is time consuming. Until that research can be done, one can't accept the null hypothesis. The most reasonable assumption is that limiting aerosols is a wise step (especially for teachers & staff).
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Howard Eichenbaum's death leaves us with such an immense void.
He was a real friend and inspiration.
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I'm proud to announce an update on
@XiaonanLiu6
's amazing preprint about how the effects of retrieval practice can be dramatically changed by sleep dependent memory consolidation. And yes it includes a pre-registered replication
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My New Preprint: Time, Memory, and the Legacy of Howard Eichenbaum for Hippocampus spec issue on Time. It emphasizes Howard's contributions but reviews lots of other stuff. Contains many random speculations, controversial footnotes, & a few easter eggs.
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Quick rant: Can we stop using the word "mechanistic" in manuscript and grant reviews? This term is pretty much a giveaway that you have no idea what the fuck you are talking about.
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Was great to be on
@NewsHour
to bust myths & stereotypes about aging and memory. 1 in 6 Americans is over 65, so this issue cuts across parties
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Check it out. We made sure to get some fresh voices. Authors include Daniella Schiller, Siobhan Pattwell, Mani Ramaswami,
@maureenritchey
@m_j_gruber
@kap101
@ArneEkstrom1
@JamesWardAntony
@doellerlab
The Cognitive Neurosciences (6th edition,
@mitpress
) is out now. Very pleased to have contributed as Editor of the Memory section along with
@CharanRanganath
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In Boston for the
#CRAM
Eichenbaum Memorial Meeting. It's bittersweet visiting BU w/o Howard, but he would have loved to be remembered with a meeting like this. If you can't come, catch the live stream at
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TFW one of your science heroes is about to introduce you and you realize that you’d better give a damn good talk.
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@brae_young
Two things (sorry) I wish I knew: (1) Take yourself seriously. Even if you feel like an imposter at times, you aren't, and students will be looking to you for leadership. (2) Take time to plan the furniture, layout, and color scheme for your lab and office.
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Ridiculous photo from my talk
@humboldtuni
Berlin. Apparently the comically oversized pointer led me to break out in a song and dance routine. Next stop Broadway! (photo credits and special thanks to
@robertoECabeza
&
@johndylanhaynes
)
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New paper from Randy O'Reilly, Jake Russin, & I. Not feeling narcissistic enough to write a thread. TLDR, we discuss cognitive maps in the context of the bigger issue of systematicity in the brain and in AI. Our take is akin to work by
@summerfieldlab
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New article in the
@guardian
--on memory, mental time travel, imagination, and what it means to have a "good" memory.
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@JunhyongKim
@woodforbrains
The degree of prejudice I've seen against students and faculty from China and India is downright shocking. The effects are tangible, as the field of Psychology (and its academic culture) is centered around European+White American cultural norms.
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2 more points: (1) Neuroscience also has poorly defined/agreed upon terms. Reasonable people disagree about definitions of hippocampus & amygdala. (2) see
@russpoldrack
&
@talyarkoni
for one take on how to think about the mind:
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I'm really excited to announce a new review paper from
@XiaonanLiu6
. This is a comprehensive, easy to read review of how testing improves memory for tested material but can have varying effects on untested material. I'm sure Xiaonan will thread this paper, but (1/2)
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This year was the best pi day ever—teaching award and a pie from
@TauBetaPi
@UCDavisCOE
(awarded today because I was out of town last week). Thanks this totally made my day!
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I'm reading some of Pavlov's lectures, and the range of topics he studied and his thoughtful ideas (which included "internal models"!!!) is fascinating...especially the orienting response (or as he wonderfully called it, the "what-is-it" response).
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Here is a great list of psychologists (broadly defined) on Mastodon along with a handy tool to add any/all to your follow list:
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Art Shimamura just posted an absolutely inspirational column in
@PsychToday
on his experience with terminal cancer, and how he has stayed mentally & physically active and engaged with life. Read it.
Maintaining an Active Brain and Body—Even With Cancer
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I was interviewed by
@Jamie_Ducharme
on the science behind Christine Blasey Ford's testimony. Though she is not explicitly mentioned in the article, I credited
@MaraMather
's groundbreaking research on emotional arousal, norepinephrine, and memory.
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That time of year for rec letters & I'm again filled with hate for grad programs that ask you to enter 10 lines of contact information and then answer 20 questions about whether your applicant is in the top 1-2% of everyone you've ever known in every possible domain of life.
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@PessoaBrain
I'll never forget how, back when I was a nobody, Howard Eichenbaum treated me with so much respect, like everything I had to say was important. It was life changing. He did that with so many junior people. I try to follow his example though I'm nowhere near the person he was.
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@NoraNewcombe
@mariam_s_aly
@Columbia
@ColumbiaPSYC
For all those who have responded so far, I think it would be good to get organized. Please go to this Google Doc if you are concerned about this:
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For those who will be online for
#SfN2021
here is the info on Dynamic Memory Lab presentations. Listed times are for discussion, but you can access the talks/posters & DM ?s to presenters at any time.
@AnnaLeshinskaya
@YicongAlanZheng
@XiaonanLiu6
@JamesWardAntony
@KaminskyK
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On a positive (not preachy)note: at yesterday's lab meeting, I was ready to escape into a world of data, but I decided to encourage lab members to talk about what is going on, and I listened. I think it was the right thing to do, and I encourage other PI's to do so too.
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Last year, I started signing all reviews, but still wondering how to advise trainees. I'm unsure how many junior researchers are comfortable signing reviews, but I suspect that retribution isn't something to worry about if you do a well-written signed review. Any thoughts?
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Interesting study showing that "implanted" false memories can be reversed, based on principles from the source monitoring framework. People also become a little more skeptical about their real memories, but that's not necessarily a bad thing...
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How does the primate hippocampus encode contextual variables during goal-directed navigation? See new commentary by
@Maya__GS
and I for
@TrendsNeuro
on the recent exciting work by
@rob_gulli
&
@JulioMTNeuro
in
@NatureNeuro
. And of course read their paper!
“Contextual Codes in the Hippocampus”
Maya Geva-Sagiv
@Maya_GS
and
@CharanRanganath
TINS Spotlight on
@rob_gulli
et al. 2020
@NatureNeuro
, Martinez-Trujillo group
@JulioMTNeuro
50day free access link:
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Here's a video of my
@PsychScience
talk
* Warning: If you watch me in the video, you might get motion sickness; [note that I had traveled from Germany the night before].
* No deep theory here, just synopsis of great work by
@m_j_gruber
&
@trjonker
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Computational argument against standard systems consolidation & for optimized use of hippocampus to facilitate neocortical generalization
Organizing memories for generalization in complementary learning systems
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Very cool study from
@alyssa_borders
ambitious dissertation, with converging evidence from amnesia patients (w/deficits at a 1s delay!) and fMRI. I've been saying that the hippocampus is involved in WM for 20 years, and I was still surprised by her findings.
The hippocampus is not just involved in long-term memory. It is also critical for working memory (WM). Why?
Patient & fMRI evidence shows that the hippocampus is important for maintaining WM precision.
By
@alyssa_borders
,
@CharanRanganath
, & Yonelinas
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Huge congratulations to
@damnmemory
Eda Mizrak on being named an
@PsychScience
Rising Star (as well as
@WilmaBainbridge
@TMR_et_al
Eitan Schechtman and
@aw_gilmore
Adrian Gilmore...and really all the awardees)!
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This looks like an amazing paper. In a connected brain there are no truly focal lesions. Amnesia is most likely a disconnection syndrome
Just out: In a cohort of 38 patients with hippocampal amnesia we show that memory variability (including for remote autobiographical events) is explained by network-wide abnormalities in brain structure and function
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One of the coolest papers of 2019 from
@anne_maass
"Alzheimer’s pathology targets distinct memory networks in the ageing brain"
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One example of the supportive (and insightful) mentoring he gave to people all the time.
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Mayank is one of the smartest people I know but seeing this puts him on a whole new level. Most have no idea what it takes to overcome poverty and/or caste discrimination in India. If you care about diversity in STEM, the hippocampus, watch this video!
From slums of Mumbai to quantum physics, neurophysics, VR, AI and unsolved mysteries of the brain.
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That feeling when your advisor introduces your talk at your alma mater...
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We are recruiting a research assistant for fMRI, EEG, behavioral, and possibly patient research. The RA be part of a joint lab at
@UCDavisCNS
Center for Neuroscience that includes Randy O'Reilly and Andy Yonelinas, Submit applications at:
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I'm proud of my student Yicong (Alan) Zheng
@zycyc1998
, who worked with
@XiaonanLiu6
on this huge (n~90) dataset showing how modulation of alpha and beta oscillations is related to sequence memory deficits in schizophrenia. Amazing work!
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New preprint & my first paper w/Randy O'Reilly. We discuss the computational benefits of differentiating b/w content and structure in a variety of domains. We propose that event structure may be represented by the PM Network via predictive learning
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Interesting work showing that animate words are more likely to be remembered. This and
@WilmaBainbridge
's memorability work provides a good reason to reconsider using "subsequent memory" paradigms in which item properties are generally ignored.
Yay, officially published!
"Exploring word memorability: How well do different word properties explain item free-recall probability?"
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For the younglings: I was at a dinner tonight where everyone was more well read than me. I felt like a total imposter. But I learned a bunch of new stuff. If you’re challenging yourself and surrounding yourself with smart people you’ll feel like an imposter & that’s great!
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Mark
@mtdespo
was a fantastic mentor to so many brilliant scientists that it would take a multi-page thread to tag them all. I'm really happy to see him get this honor. And damn, the whole lineup of speakers announced by
@CNSmtg
@CogNeuroNews
is stellar.
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Representation of Real-World Event Schemas during Narrative Perception
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@Psychonomic_Soc
@UCD_MAP
@UCDavisCNS
@UCDavisPsych
Thank you this is a big honor, really reflecting the support of an awesome community (special thank you
@AyannaKim
) & awesome students & postdocs who I've gotten to collaborate with over the past 20 (!) years
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Really psyched (no pun) to be part of this and get a chance to answer “what’s the deal with episodic memory?”
Thanks to the contributions of an amazing group of field-leading authors, Mike Kahana and Anthony Wagner (
@SUMemoryLab
) are excited to announce that the Oxford Handbook of Human Memory is nearing publication! Chapters can be found at:
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@jpeelle
1. Best predictor of getting a grant is the # of proposals you’ve submitted. 2. Never propose something you don’t like just because you think it will please the reviewers
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What are some of your favorite memory-related papers (broadly defined) you read this year? Doesn't have to be published this year, just what you read? No self-citations, nepotism allowed. Bonus points if it is outside of your university and area.
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Has anyone out there tested whether wearing cloth masks (not N95) affects task fMRI--i.e., the detection of activation or pattern differences between conditions? People have been anecdotally talking about increases in CO2 levels, but has anyone got task fMRI comparisons? Thanks!
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@JunhyongKim
@woodforbrains
Overrepresentation is a a smokescreen in my opinion. Maybe true in reductionist fields but in fields that are based more on communication & interpretation (i.e., psychology) it's a different story. I was probably the first Indian American ever admitted in my graduate program.
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FYI, I don't think this is limited to UCI listeners. There'll be some very fresh (and preliminary data)...
🥳 Tomorrow at 11AM the CNLM will host a Virtual Colloquium with Charan Ranganath, Ph.D. 🎉 “Memory at the scale of episodes: How the neocortex and hippocampus support memory for complex events” 🚨
@CharanRanganath
@UCDavisCNS
@mike_yassa
⤷RSVP here:
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In the new issue of
@newyorker
,
@groopman
goes deep into
#whyweremember
! Aside for his incredibly generous review, the article is notable for his own storytelling about individual and collective memory. Check it out!
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Can't wait to see this paper.
The individual with this precuneus lesion experienced a dramatic change in how he perceived the passage of time after surgery of a glioma.
Minutes felt like hours… each time he would check his watch he’d be surprised how little time had passed. 👇
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At a time like this, everyone on earth needs to see this amazing cat.
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After two challenging pandemic years, I am so grateful for the incredibly stimulating discussions w/the students at FAM
@LIN_Magdeburg
& to my fellow speakers who graciously put up w/my stream of annoying questions. I'm inspired to do a similar meeting for
@UCD_MAP
in the future
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This is a really cool piece of work, and among the most unequivocal results I have ever seen. From filmmaker/neuroscientist
@zreagh
Really excited to *finally* share a preprint for a paper
@CharanRanganath
and I have been working on for a while: A cortico-hippocampal scaffold for representing and recalling lifelike events 1/13
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I'm excited to announce that I'll be doing a book sale & signing for
#WhyWeRemember
@CNSmtg
on Saturday April 14 at 5:30pm in the
@SheratonCentre
Grand Ballroom. Thanks to
@CogNeuroNews
&
@doubledaybooks
@YorkUniversity
Also will share swag for upcoming Pavlov's Dogz show!
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Rethinking retrosplenial cortex: Perspectives and predictions
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