Cognitive Neuroscience, Learning & Memory, Spatial Navigation, Neuroimaging | Postdoc at University of Freiburg @bartos_marlene @UniFreiburg
Freiburg, Germany
Joined April 2020
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Paper out @NatureComms 🎉🎊 A huge thanks to the reviewers and editors who helped us substantially improve our article. @mohajerani77
"Cortical reactivation of spatial and non-spatial features coordinates with hippocampus to form a memory dialogue"
👉👉 rdcu.be/dr45V
ALT Editor's summary: The mechanisms of episodic memory are not well understood. Here, the authors show that the reactivation of non-spatial information precedes the reactivation of spatial information, and that both are correlated with hippocampal sharp-wave ripples. ==> https://www.nature.com/articles/s41467-023-43254-7
HaoRan Chang retweeted
Happy to share my first postdoc paper from the group of @attila_losonczy! Big team effort with @StephHerrlinger , @Margaret_Conde_, @Cliodhna, @yoojuyoun and the rest of the team!
Preprint : biorxiv.org/content/10.64898…
Video: youtu.be/Sl27tROLP-E
Website: shorturl.at/nCaAn
HaoRan Chang retweeted
Stable maps from drifting neurons: CA1 solves the "representational drift paradox" through coordinated population dynamics.
New preprint w/@AntjeKilias @bartos_marlene @JF_Sauer showing that representational drift isn’t random
biorxiv.org/content/10.1101/…
HaoRan Chang retweeted
View our new study on persistently active ensembles of neurons in the medial prefrontal cortex of mice that reliably maintain trajectory-specific tuning over week’s while animals perform an olfaction guided spatial memory task. Published in Nature Com.
nature.com/articles/s41467-0…
HaoRan Chang retweeted
I am happy to share our recent study published in Nature Comm on hippocampal interneuron circuits governing the representation of novelty in mice. doi: 10.1038s41467-024-44882-3
HaoRan Chang retweeted
#ResearchHighlight| Non-spatial cues precede spatial attributes in memory retrieval! Using two-photon imaging in mice, @hr_chang @mohajerani77 and colleagues shed light on neocortex-hippocampus dynamics. 🧠🐭#Memory
Highlight👇:
nature.com/articles/s41684-0…
HaoRan Chang retweeted
Job opportunity: A postdoctoral position is available for
a video-based pose-estimation project. Please RT.
docs.google.com/forms/d/17T-…
HaoRan Chang retweeted
Interested in reactivation, pattern completion, and index theory: if so, you may wanted to read this paper by an amazing trainee, Dr. HaoRan Chang.
Paper out @NatureComms 🎉🎊 A huge thanks to the reviewers and editors who helped us substantially improve our article. @mohajerani77
"Cortical reactivation of spatial and non-spatial features coordinates with hippocampus to form a memory dialogue"
👉👉 rdcu.be/dr45V
ALT Editor's summary: The mechanisms of episodic memory are not well understood. Here, the authors show that the reactivation of non-spatial information precedes the reactivation of spatial information, and that both are correlated with hippocampal sharp-wave ripples. ==> https://www.nature.com/articles/s41467-023-43254-7
HaoRan Chang retweeted
Checkout our latest mouse string-pulling manuscript
1. String thickness variation increases task difficulty and influence mouse mouth/hand use during string-pulling.
2. Total pull time changes as a function of string thickness and follows Fitts’s law.(1/2)
authors.elsevier.com/c/1hwLa…
HaoRan Chang retweeted
Many interesting findings in this great work led by @RasaGulbe
Sharing our new findings:
(1) Resonance phenomena are preserved across species and spatial scales.
(2) Standing waves in the brain: Chladni-like patterns in the visual cortex.
tinyurl.com/5n6hdcpp
With: @mohajerani77 @viajesubmarino @mjnazaria A. Heimel M. X Cohen M. Rule
HaoRan Chang retweeted
1/ New paper from the lab; Weak-hyperactive hippocampal CA1 neurons in the prodromal stage of Alzheimer's disease .... sciencedirect.com/science/ar…
Codos to @SamsoonInayat @BB_McAllister @hr_chang @robsutherland1 and twitter-less Ian Whishaw
HaoRan Chang retweeted
# Chinese scholar # Old Montreal fire
A large fire broke out in a historical building in Old Port District of Montreal, Canada at 5:45 am on Thursday. 6 people remain missing, among which is a promising young Chinese scholar, Dr. An Wu, who came to Montreal for a conference.
Huge #Congrats to @AjabiZaki & @markpaulbrandon on their latest publication in @Nature! Their hard work and dedication have truly paid off. Excited to see such groundbreaking research making an impact.
Now published @Nature, we used miniscopes to study the thalamic head direction system during drift and reorientation.
Paper: nature.com/articles/s41586-0…
Summary: douglas.research.mcgill.ca/n…
There’s a lot in the paper, but my favorite piece to share/highlight is in figure 2:
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HaoRan Chang retweeted
Wide-field voltage imaging, electrophysiology & #2photonmicroscopy: @JavadKAbadchi from @mohajerani77 lab & colleagues successfully combine these methods to study hippocampal-cortical interactions in sleeping vs #awakemice
elifesciences.org/articles/7…
1/ Excited to share our latest study led by my great friend Dr Ingrid Esteves
sciencedirect.com/science/ar…
Are spatial memories ever consolidated into cortex? Lesion studies have shown us the answer is “no”. Surprisingly, our findings under 2-photon suggest otherwise. Summary below:
4/ However, the ability to form a new representation for a post-operatively exposed environment is severely impaired. Behaviourally, animals showed pre-emptive licking on approach to the reward location in the familiar, but not the novel environment.
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