Sheena Josselyn

short Canadian

[Joshua P Johansen @JoJoLab5]

Congratulations to my RIKEN colleague Ian Schmitt on an outstanding paper—and the first publication from his lab!
Control of representation updating by higher-order thalamus enables history-based decision-making: Neuron https://t.co/yRN9Ziznuo

[International Brain Research Organization (IBRO) @IBROorg]

🚨 The call for symposia for #IBRO2027 is open!

Have an idea that could shape the future of #neuroscience? Propose a symposium & join us in Cape Town from 13-16 Sep 2027 🇿🇦

🗓️ Submit by 31 Jul
https://t.co/Ok0ZESSwuC

#CallforSymposia @SANeuroSoc @garriearumugam @ElfarrashSara

[International Brain Research Organization (IBRO) @IBROorg]

📅 Save or share this post - your IBRO #grants calendar for June is here!

This month features three opportunities across different career stages and regions 🌍

Discover the eligibility criteria & deadlines
🔗 https://t.co/N3cbnes3Pu

[Michael Williamson @m_r_williamson]

Thrilled to share that I’ll be starting my lab at the SickKids Research Institute and University of Toronto in August!

https://t.co/AcQZxHLwpF

Recruiting at all levels. Get in touch if you’re interested in astrocyte biology of cognition and disease!

[TSN @TSN_Sports]

CANMNT's Alphonso Davies was singing "Baby" by Justin Bieber after Bayern Munich's Bundesliga title win 😂🏆

[CAN ACN @CAN_ACN]

CAN and CIHR-INMHA are very proud to announce the winners of the 2025 Brain Star awards. See all their profiles here: https://t.co/JYFtIQZcD0

[Molecular & Cellular Cognition Society @MCCStweets]

Save the date! #MCCS26 will be on November 12 & 13 in Washington, DC, ahead of #SfN26

With this lineup of invited speakers, it's guaranteed to be a great meeting 🤓

Stay tuned for more information about registration and abstract submissions!

[Sheena Josselyn @sjo09]

Disrupting this activity prevents long-term memory formation.

The findings provide direct support for Hebb’s long-standing idea that reverberating neural activity helps stabilize memories.

Amazing team effort led by Sungmo Park.

[Sheena Josselyn @sjo09]

New paper from the lab. Using longitudinal ca imaging, activity-dependent tagging and optogenetics, we show that newly allocated fear engram neurons in amygdala undergo a brief period of coordinated “offline reverberation” immediately after learning.

https://t.co/ELcRXieer2

[Sofiya Zbaranska @neur1s]

Thanks to @UofT for featuring my research on social memory and translating memory mechanisms in the brain into better AI. Read the full story: https://t.co/kt3BsI62KY

[Optogenetics Gordon Research Conference @OptoGRC]

Can't wait for this #OptoGRC2026 keynote session that will shine a light on the ideas and tools driving optogenetics🔦🧠

Bringing together @CurioNeuro, @OferYizhar & @sjo09, expect a powerful discussion from leaders in the field!

[John Lukens @LukensJohnR]

Microglia-dependent regulation of fear memory extinction
https://t.co/PgsfzXmocB

[Brokoslaw Laschowski @DrLaschowski]

Are you a graduate student in #Ukraine interested in machine learning and neuroscience? My research lab at #UofT is now accepting applications for remote thesis supervision.

(1/3) #neuroAI #compneuro @VectorInst @UofT @UofTCompSci @UHN

[University of Toronto @UofT]

What if memories could be rewritten? #UofT researcher Sheena Josselyn studies how memories are encoded, stored & recalled, and how they might be reprogrammed or erased, advancing research on PTSD and Alzheimer’s disease. 🧠 https://t.co/BNBqhEOAkZ

[National Academy of Sciences @theNASciences]

Congratulations Michelle Monje of @StanfordMed, newly inducted #NASmember! #NAS163 #neurology

[Sheena Josselyn @sjo09]

Anyone who has seen me talk lately knows i have a fascination with Taylor Swift. I was introduced to her music by my daughter & her friends. So when @SfNtweets asked me to write a review....

Engrams and Memory: My Scientific "Eras Tour"

https://t.co/58vRLAf3tO

[University of Toronto @UofT]

A researcher at SickKids and #UofT, Sheena Josselyn explores how memories are encoded, stored & recalled - and even how they can be reprogrammed, implanted & erased 🧠 https://t.co/BNBqhEOAkZ

[Katrina Choe @choekatr]

🏃‍♀️ SONA abstract and regular-rate registration closes today at NOON! 🏃‍♂️

Join us at @McMasterU on Saturday, May 2, 2026, for a showcase of Southern Ontario’s leading neuroscience research!

[Sheena Josselyn @sjo09]

Huge thanks to all involved Ying Wang, Bozhi Wu, Alex Jacob, @Adam_Rams, @circuitfreud, Jung Hoon Jung, Xiaoping Fang, Katherine Duncan, Meg Schlicting, @Franklandlab.

https://t.co/zPUTDFImy3

[Sheena Josselyn @sjo09]

Excited to share our latest in @CurrentBiology (they who publish the coolest papers!)
Memories are encoded by sparse neuronal ensembles (engrams). But most evidence comes from "simple" associative learning tasks. What about more integrative memories like spatial navigation?

[Sheena Josselyn @sjo09]

We found
1) core engram principles extend from associative learning to complex spatial memory
2) overlapping neuronal ensembles link memories,
3) engrams compete for control of behaviour
4) engrams can be reactivated to guide navigation under degraded or ambiguous conditions