Mariana Pereira
@marianapereira.bsky.social
260 followers 55 following 10 posts
Postdoc at the Donders Institute studying and imaging the brain during sleep & dreams ~ http://dreslerlab.org | Former Halkes Women+ Network (she/her)
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marianapereira.bsky.social
IT IS TOMORROW! 😴💭

Join us for an exciting morning! If you can't make it in person, tune in at sleep.donders.institute

See you all there!
marianapereira.bsky.social
From sleep 💤 to dreams 🌙 to daydreams ☁️ - what is the brain up to?

I’m excited to host a mini-symposium before my PhD defense! Join us in person or online, details in the flyer!

@sarahschoch.bsky.social @dresler.bsky.social @dondersinst.bsky.social
Reposted by Mariana Pereira
dr-adri.bsky.social
💤 𝗛𝗼𝘁 𝗼𝗳𝗳 𝘁𝗵𝗲 𝗽𝗿𝗲𝘀𝘀 💤

🧠 Our findings indicate that 𝘀𝘂𝗯𝗷𝗲𝗰𝘁𝗶𝘃𝗲 𝘀𝗹𝗲𝗲𝗽 𝗱𝗲𝗽𝘁𝗵 is not solely determined by reduced brain activity. 𝗜𝗺𝗺𝗲𝗿𝘀𝗶𝘃𝗲 𝗱𝗿𝗲𝗮𝗺 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝘀 appear to maintain the 𝘀𝘂𝗯𝗷𝗲𝗰𝘁𝗶𝘃𝗲 𝘀𝗲𝗻𝘀𝗲 𝗼𝗳 𝗱𝗲𝗲𝗽 𝘀𝗹𝗲𝗲𝗽 as 𝗵𝗼𝗺𝗲𝗼𝘀𝘁𝗮𝘁𝗶𝗰 𝘀𝗹𝗲𝗲𝗽 𝗽𝗿𝗲𝘀𝘀𝘂𝗿𝗲 naturally declines across the night.
spacelabimt.bsky.social
🚨 New preprint 🚨
"Immersive NREM dreaming preserves subjective sleep depth against declining sleep pressure." We analyzed 1,024 awakenings collected across 196 nights with high-density EEG (256 ch.) to explore the relationship between dreaming and subjective sleep depth.

doi.org/10.1101/2025...
Immersive NREM dreaming preserves subjective sleep depth against declining sleep pressure
Perceived sleep depth is a key determinant of subjective sleep quality, traditionally thought to reflect unconsciousness and reduced cortical activation. Here, we combined high-density EEG with a seri...
doi.org
Reposted by Mariana Pereira
Slow waves during sleep are fundamental for neural homeostasis and are impaired in neurodegenerative diseases. But what about sleep-like slow waves during wakefulness? Are these slow waves altered in Parkinson's disease? Are these slow waves uncovering psychosis?
Sleep-like slow waves during wakefulness uncover a malignant form of Parkinson’s disease
Slow waves during sleep are fundamental for neural homeostasis, metabolic regulation, and waste clearance, and are known to be altered in neurodegenerative diseases. Sleep-like slow waves (SLSW) have ...
www.medrxiv.org
marianapereira.bsky.social
We’ll explore the link between poor sleep and dementia, new models of how we recall dreams, reliable ways to measure dream recall (scales and diaries), and the cognitive neuroscience of daydreaming, thus setting the scene nicely for the defense to follow.
marianapereira.bsky.social
From sleep 💤 to dreams 🌙 to daydreams ☁️ - what is the brain up to?

I’m excited to host a mini-symposium before my PhD defense! Join us in person or online, details in the flyer!

@sarahschoch.bsky.social @dresler.bsky.social @dondersinst.bsky.social
Reposted by Mariana Pereira
sarahschoch.bsky.social
I made some tools for our (MANY!) dream reports. I am making them openly available for others to use! First DreamProcessor github.com/SarahSchoch/..., a simple tool to preprocess dream reports (clean, anonymize, split) that integrates semiautomatic approaches. #sleeppeeps @dresler.bsky.social
GitHub - SarahSchoch/DreamProcessor: A tool to process dream reports before rating.
A tool to process dream reports before rating. Contribute to SarahSchoch/DreamProcessor development by creating an account on GitHub.
github.com
marianapereira.bsky.social
This supports a top-down model of dream recall, where cognitive control + higher-order visual processing aid in encoding & retrieving dream content.

Finally a large-sample, multimodal MRI study! I am so excited to share this (years-in-the-making) study with you. Huge thanks to everyone involved!
marianapereira.bsky.social
Using qMRI, DTI, rs-fMRI & Linked ICA, we found a single multimodal component associated with dream recall frequency.

Higher recall =
⬆️ White matter integrity in fronto-parieto-occipital tracts
⬇️ Functional connectivity in DMN & attention networks

#dreamresearch #neuroimaging #sleeppeeps #dreams
marianapereira.bsky.social
🧠💭 Why do some people remember their dreams more than others?

In our new preprint, we used multimodal neuroimaging (qMRI, DTI, rs-fMRI) and data-driven analysis (LICA) in 258 participants (!!!), revealing unique structural and functional brain signatures linked to dream recall frequency.
biorxiv-neursci.bsky.social
The Neural Architecture of Dream Recall Frequency: Insights from Interindividual Variations in Brain Structure and Function https://www.biorxiv.org/content/10.1101/2025.05.20.655114v1
marianapereira.bsky.social
Congratulations - well deserved!! 👏
Reposted by Mariana Pereira
wamsleylab.bsky.social
You've heard about the stages of sleep, but what about the stages of WAKE?

New preprint from our lab just posted on PsyArXiv. This follows other recent studies from our lab using a data-driven method to parse long periods of wake into discrete "online" and "offline" states.

🧠🟦
#PsychSciSky
OSF
osf.io
Reposted by Mariana Pereira
somiataei.bsky.social
Have we made the Hypnobioscope a reality yet? Come by my poster #031 at @worldsleep2023 today 18:00 to learn about the history of research on learning during sleep.
marianapereira.bsky.social
My first post here 🦋

Delighted to have had the opportunity to talk about some of my PhD work in my home country for the first time! I showed some of our very recent results on diffusion MRI in relation to dream traits as one way to study dreams offline. #WorldSleep23 🧠🤓
Reposted by Mariana Pereira
dresler.bsky.social
We are at #WorldSleep23

Here a brief (and continuously completed) thread with our contributions - if you are interested in any of the topics and happen to be in Rio in person, please approach us, otherwise reach out remotely!

#Neuroskyence #PsychSciSky
Worldsleep
Reposted by Mariana Pereira
dresler.bsky.social
Tomorrow, @marianapereira.bsky.social will present fresh-from-the-oven results from her multimodal imaging approach to understanding dream traits at the Neuroscience of Dreaming symposium.

Join us in Room 24 at 9:00 AM on Tuesday!

#WorldSleep23#Neuroskyence #PsychSciSky
Mariana Pereira
Reposted by Mariana Pereira
sarahschoch.bsky.social
Interested in dreaming or memory consolidation? Come by my poster at @WorldSleep2023 #033 today at 18.00 to learn about our Registered Report and what I am doing during my >50 sleepless nights. #sleeppeeps #dreams #openscience
Sarah Schoch standing in front of poster