May 2021 PMID 34093109

The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex.

David M Eagleman, Don A Vaughn

Mentions

46
Peak: 10 in Jun 2021
across 4 sources since May 2021

Extended reach

6,311,428
potential audience

Total likes

99,601

Video views

5,970,833

Mentions per month

May 2021 – Jun 2025

Where it's discussed

  • X / Twitter38 posts
  • News3 articles
  • Blogs3 articles
  • YouTube2 videos

AI synopsis

What people are saying

Discussion examples include users highlighting the rapid visual cortex takeover and how dreaming might prevent this, with phrases like 'dreams add noise' or 'defend the visual cortex' illustrating enthusiasm and curiosity. The tone and detailed references indicate strong agreement, interest, engagement, and perceived importance of the research.

AgreementStrong agreement

Most discussions support the hypothesis that REM sleep's role includes protecting the visual cortex from takeover, as seen in phrases like 'dreaming serves to keep the rest of the brain from cannibalizing it' and positive references to the theory.

InterestHigh interest

Comments show high curiosity and engagement, with users calling the theory 'interesting,' asking about mechanisms, and sharing related research, indicating strong interest.

EngagementHigh engagement

Many posts reference detailed studies, share links, and participate in journal club discussions, reflecting deep engagement and active consideration of the research's implications.

ImpactHigh impact

The theory appears to influence scientific and public discussions, prompting broader questions about sleep and brain plasticity, demonstrating a significant impact on understanding sleep functions.

Abstract in brief

  • Brain regions defend their activity territory, and if that activity decreases (like in blindness), neighboring regions can quickly take over.
  • Recent findings show this takeover can happen within an hour, leading to a new hypothesis about REM sleep's role in protecting visual system activity.
  • Studies across 25 primate species reveal a positive correlation between REM sleep and brain plasticity, with both increasing as species are more evolutionarily related to humans and decreasing with age.

Top posts

Most liked on X and Bluesky
David Eagleman
@davideagleman · X

WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. For a deeper dive into the #science, see our detailed analysis across 25 species (published in Frontiers): https://t.co/5ND0VIFyVy https://t.co/cuE8S0NVkd

Dec 31, 2021 · 42 likes · 10 shares · 65,130 followers View post →
ANALİST
@cuden000 · X

Çok ilgi çekici. Neden rüya görüyoruz? https://t.co/ToAoY3F2tf

Jul 26, 2021 · 18 likes · 2 shares · 33,118 followers View post →
Frontiers - Neuroscience
@FrontNeurosci · X

New Research: The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex: Regions of the brain maintain their territory with continuous activity: if activity slows or stops (e.g., because of… https://t.co/sYF7A46QQJ #Neuroscience

Jun 3, 2021 · 17 likes · 7 shares · 80,769 followers View post →
David Eagleman
@davideagleman · X

@social_brains Hi Matt - all data in here: https://t.co/5ND0VIFyVy Keep me posted on your thoughts ~

Jun 20, 2022 · 10 likes · 65,130 followers View post →
Dakota McCoy, Ph.D.
@WildlifeMcCoy · X

Why do we dream?! Two recent papers propose cool hypotheses. 1) dreams add random noise to help us generalize and stop our brains from "overfitting" https://t.co/6Zn0L2VR4t 2) dreams defend the visual cortex from encroachment by other brain regions https://t.co/fN4GCiZc13 ‼️

Jan 4, 2023 · 8 likes · 1 share · 1,399 followers View post →
Comparative Crossmodal Cognition Collective
@CompCrossCognC · X

This week we are having a journal club chat about this paper by @davideagleman from this past winter: "The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex" https://t.co/k9dYQP72pa

Jun 11, 2021 · 4 likes · 1 share · 157 followers View post →

All mentions

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Zafir Ivanov
@ZafirIvanov · X

@huzunkar @sandalsonfeet @RichardDawkins Have you encountered this explanation of why we dream? https://t.co/NvmqzgLcmS

Jun 4, 2025 · 37 followers View post →
whisper :)
@justsomewhisper · X

@sosadoesit @qtemb @erikphoel any spatially close mechanisms of the brain https://t.co/1cOmO0ogk7 https://t.co/85M8tOCLIH

Aug 20, 2024 · 2 likes · 50 followers View post →
senay
@askara_m2 · X

Frontiers | The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex https://t.co/3YIVElfVBC

Aug 11, 2024 · 38 followers View post →
Barry Cynamon
@BCynamon · X

@matthewcobb Here is a link. It's Eagleman and Vaughn (2021): https://t.co/ll9CG8zOwF

May 3, 2024 · 1 like · 448 followers View post →
Curcio
@XTXinverseXTY · X

@FanParticle @BecomingCritter “Takeover of the visual cortex” apparently happens so rapidly that these authors speculate dreaming serves to keep the rest of the brain from cannibalizing it https://t.co/YdZpNG5g7Y

Aug 23, 2023 · 1 like · 112 followers View post →
Zoltan Csaki
@ZoltanCsaki_ · X

Read more about it: https://t.co/AEEWb0AzEQ

Jun 3, 2023 · 107 followers View post →
Nicky Buttigieg
@nickybuttigieg · X

@anilkseth @packyM @cunningstudent @GlobeIdeas @kevin2kelly @erikphoel Another interesting paper is https://t.co/XxUd5YNFky by @davideagleman and @DrDonVaughn

Apr 16, 2023 · 2 likes · 208 followers View post →
Vincent Hare
@vinhare · X

RT @WildlifeMcCoy: Why do we dream?! Two recent papers propose cool hypotheses. 1) dreams add random noise to help us generalize and stop…

Jan 5, 2023 · 1 share · 413 followers View post →
Dakota McCoy, Ph.D.
@WildlifeMcCoy · X

Why do we dream?! Two recent papers propose cool hypotheses. 1) dreams add random noise to help us generalize and stop our brains from "overfitting" https://t.co/6Zn0L2VR4t 2) dreams defend the visual cortex from encroachment by other brain regions https://t.co/fN4GCiZc13 ‼️

Jan 4, 2023 · 8 likes · 1 share · 1,399 followers View post →
Jim Bloom
@jimmyroybloom · X

Frontiers | The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex https://t.co/ORY175vICG

Oct 16, 2022 · 2,423 followers View post →
David Eagleman
@davideagleman · X

@social_brains Hi Matt - all data in here: https://t.co/5ND0VIFyVy Keep me posted on your thoughts ~

Jun 20, 2022 · 10 likes · 65,130 followers View post →
Nora Tessem
@NoraTSM · X

@pati_gallardo This one is also interesting: https://t.co/08PPVHauQi

Apr 22, 2022 · 3 likes · 298 followers View post →
Hagen M. Gegner
@hi_hagen · X

Do you #dream? Yes? Congrats! The visual regions of your brain live to see another day. Really cool "defensive activation theory" on why we dream = REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex https://t.co/duzlhtJAts

Mar 7, 2022 · 1 like · 1,118 followers View post →
Cognitome LLC
@Cognitome11 · X

RT @davideagleman: WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. F…

Jan 12, 2022 · 10 shares · 136 followers View post →
Samaa Al-Moussalli
@Smousali1974 · X

RT @davideagleman: WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. F…

Jan 5, 2022 · 10 shares · 630 followers View post →
Chloe Luv
@ChloeLuv_PSO · X

RT @davideagleman: WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. F…

Jan 4, 2022 · 10 shares · 1,636 followers View post →
RisingBrains.Ltd
@RisingBrains001 · X

RT @Smousali1974: https://t.co/z9zho0T6Xk

Jan 4, 2022 · 1 share · 416 followers View post →
kaveinology
@kaveinthran · X

RT @davideagleman: WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. F…

Dec 31, 2021 · 10 shares · 1,114 followers View post →
Holli-Anne Passmore
@Passmore_HA · X

RT @davideagleman: WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. F…

Dec 31, 2021 · 10 shares · 476 followers View post →
Samaa Al-Moussalli
@Smousali1974 · X

https://t.co/z9zho0T6Xk

Dec 31, 2021 · 1 like · 1 share · 630 followers View post →
Michael Shook @mshook@mastodon.social
@mshook · X

RT @davideagleman: WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. F…

Dec 31, 2021 · 10 shares · 536 followers View post →
Umema A. Siddiqi
@UmemaSiddiqi · X

RT @davideagleman: WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. F…

Dec 31, 2021 · 10 shares · 852 followers View post →
David Eagleman
@davideagleman · X

WHY DO BRAINS DREAM? Exactly 1 year ago @DrDonVaughn and I shared our new theory to a wider audience in Time Magazine. For a deeper dive into the #science, see our detailed analysis across 25 species (published in Frontiers): https://t.co/5ND0VIFyVy https://t.co/cuE8S0NVkd

Dec 31, 2021 · 42 likes · 10 shares · 65,130 followers View post →
David Eagleman
@davideagleman · X

@hardmaru @schulzb589 @NicoChauvin74 https://t.co/5ND0VIFyVy

Sep 14, 2021 · 2 likes · 65,130 followers View post →
Afrasyab
@Acemi351 · X

RT @pir_anna: Çok ilgi çekici. Neden rüya görüyoruz? https://t.co/ToAoY3F2tf

Jul 27, 2021 · 2 shares · 16 followers View post →
Adaletin Sefaleti
@bozukkantar · X

RT @pir_anna: Çok ilgi çekici. Neden rüya görüyoruz? https://t.co/ToAoY3F2tf

Jul 26, 2021 · 2 shares · 1,172 followers View post →
ANALİST
@cuden000 · X

Çok ilgi çekici. Neden rüya görüyoruz? https://t.co/ToAoY3F2tf

Jul 26, 2021 · 18 likes · 2 shares · 33,118 followers View post →
OPEN Vision Impairment Research
@OPENVIResearch · X

RT @CompCrossCognC: This week we are having a journal club chat about this paper by @davideagleman from this past winter: "The Defensive Ac…

Jun 12, 2021 · 1 share · 138 followers View post →
Comparative Crossmodal Cognition Collective
@CompCrossCognC · X

This week we are having a journal club chat about this paper by @davideagleman from this past winter: "The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex" https://t.co/k9dYQP72pa

Jun 11, 2021 · 4 likes · 1 share · 157 followers View post →
Sleep Research
@SleepResearch_ · X

The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex https://t.co/B3lHPjgmU3

Jun 7, 2021 · 1 like · 7,257 followers View post →
RADIO GRAVEYARD, G.C.R.
@DIGITALDECODED1 · X

RT @FrontNeurosci: New Research: The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex: Region…

Jun 5, 2021 · 7 shares · 3,074 followers View post →
ishika
@aimherrscher · X

RT @FrontNeurosci: New Research: The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex: Region…

Jun 4, 2021 · 7 shares · 123 followers View post →
TweetOf0
@TweetOf0 · X

RT @FrontNeurosci: New Research: The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex: Region…

Jun 3, 2021 · 7 shares · 16 followers View post →
Prof. Eric AZABOU
@eric_azabou · X

RT @FrontNeurosci: New Research: The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex: Region…

Jun 3, 2021 · 7 shares · 2,505 followers View post →
Anti medX
@DrPsiquiatraMx · X

RT @FrontNeurosci: New Research: The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex: Region…

Jun 3, 2021 · 7 shares · 858 followers View post →
HeatWave
@Xarenoss1 · X

RT @FrontNeurosci: New Research: The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex: Region…

Jun 3, 2021 · 7 shares · 78 followers View post →
Frontiers - Neuroscience
@FrontNeurosci · X

New Research: The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex: Regions of the brain maintain their territory with continuous activity: if activity slows or stops (e.g., because of… https://t.co/sYF7A46QQJ #Neuroscience

Jun 3, 2021 · 17 likes · 7 shares · 80,769 followers View post →
Ordo Fraterna Fibonacci
@OrdoFibonacci · X

The Defensive Activation Theory: REM Sleep as a Mechanism to Prevent Takeover of the Visual Cortex https://t.co/dyth1NCxXp

May 22, 2021 · 2,567 followers View post →