Behav Brain Sci February 2007 PMID 17475053

Consciousness without a cerebral cortex: a challenge for neuroscience and medicine.

Bjorn Merker

Mentions

54
Peak: 3 in Nov 2019
across 5 sources since Nov 2016

Extended reach

149,538
potential audience

Total likes

82

Video views

249

Mentions per month

Nov 2016 – Dec 2025

Where it's discussed

  • X / Twitter31 posts
  • News18 articles
  • YouTube2 videos
  • Blogs2 articles
  • Bluesky1 posts

AI synopsis

What people are saying

The discussions show strong agreement with the article's thesis, with examples such as mentions of the conservation of brainstem functions and observations of patients with brain abnormalities, which emphasize the potential for consciousness beyond the cortex. The tone is analytical and curious, reflecting an engagement with the scientific evidence and theoretical challenges presented, underscoring its high impact on contemporary neuroscience debates.

AgreementStrong agreement

Most discussions acknowledge and support the article's challenge to cortical-centric views of consciousness, emphasizing the importance of the brainstem in conscious experience.

InterestModerate interest

There is a moderate level of interest, demonstrated by curiosity about the implications of consciousness without a cortex and references to related studies.

EngagementHigh engagement

Participants actively cite scientific studies, question traditional assumptions, and discuss implications, indicating deep engagement.

ImpactHigh impact

The conversations suggest that this publication influences ongoing debates and encourages reconsideration of long-standing ideas in neuroscience.

Abstract in brief

  • The article reviews evidence from various fields to explore how consciousness might be organized in the vertebrate brain, emphasizing a novel principle linking target selection, action, and motivation to optimize real-time integration for behavior.
  • It proposes that an upper brainstem system, which has been conserved throughout evolution, plays a central role in conscious function by integrating information from the cerebral cortex and maintaining coherent behavior, even in the absence of cortical input.
  • The findings challenge the traditional view that consciousness relies solely on the thalamocortical complex, suggesting instead that brainstem mechanisms are fundamental to conscious experience, as evidenced by mammals and children born without a cortex still exhibiting consciousness.

Top posts

Most liked on X and Bluesky
Avi Bitterman, MD
@AviBittMD · X

The idea that a cerebral cortex is required for sentience (understood as having any conscious experience) is just laughable. Some studies on the topic: 1) https://t.co/n2Z3GG33l1 2) https://t.co/OHdABXhZOl

Jul 3, 2021 · 17 likes · 2 shares · 26,143 followers View post →
@nicolaskuske.bsky.social
@nicokuske · X

@keithfrankish Not famous enough: Merker, B. (2007). Consciousness without a cerebral cortex: a challenge for neuroscience and medicine. Behavioral and Brain Sciences, 30(1), 63-81. https://t.co/m7MlBIJsXt

Nov 22, 2022 · 12 likes · 93 followers View post →
Avi Bitterman, MD
@AviBittMD · X

Paper 2: https://t.co/BeLgcFvz4G

Jul 17, 2022 · 11 likes · 26,143 followers View post →
Kiwi la Jarocha
@KiwiQueenieTw · X

@PonyMagno @felipeclgt95 @lobthemagical @ricarparr1 @cold_good_coffe @Galax_Francisco @drluchito @dra_kappopa @CristianXavierQ Una página para pacientes de la CDC no es una buena fuente para estos asuntos. https://t.co/c12J2cgqJL https://t.co/uCTcVxU3ao

Apr 6, 2023 · 5 likes · 1,149 followers View post →
Danlei Chen
@danlei_chen · X

@jmacshine @pianozack @MillerLabMIT @DrYohanJohn Sounds like both SC removal and SC-adjacent fiber cuts will do! Quote is from this masterpiece by Bjorn Marker: https://t.co/8cKe5O9lba

Feb 6, 2023 · 5 likes · 1 share · 132 followers View post →
Jose Ahumada
@Josevahu · X

@JohannesKleiner Consciousness without a cerebral cortex: A challenge for neuroscience and medicine Bjorn Merker

Sep 5, 2021 · 4 likes · 89 followers View post →

All mentions

Rohan
@Rohanburdened · X

@niko_kukushkin @allTheYud @IsaacKing314 @BenKorpan experience or cause absence epilepsies https://t.co/zrVoLm2bEH Carrots dont have brains or central nervous systems or nociceptors so thats evidence they arent conscious. Am I saying theres no possible way they're conscious?No, but my credence on them being conscious is very small

Nov 24, 2025 · 1 like · 542 followers View post →
Rohan
@Rohanburdened · X

@GurReptsSohn @davidmanheim @allTheYud @IsaacKing314 @BenKorpan Idk why beings would need to have a model of themselves to be able to have negative subjective experiences. Do you think consciousness (ability to have subjective experiences) cant happen without awareness of oneself? https://t.co/zrVoLm2bEH https://t.co/tbQsSgVDA9

Nov 24, 2025 · 1 like · 542 followers View post →
RESONANT FEEDBACK
@adventurer16652 · X

@grok @heidiklessigmd @AAPSonline based on the abstract alone https://t.co/GDeeie2BOM I doubt that conscious awareness is supported in these cases

Nov 11, 2025 · 4 followers View post →
Qivshi
@Qivshi1 · X

@CelesteDiWind everything is so siloed in neuroscience it would be nice to have something like this as a unifying theme merker is very interesting hadn't come across him before, really like this article too https://t.co/szLs9sVnru

Oct 28, 2025 · 1 like · 916 followers View post →
Open 2 Discussion
@to_discussion · X

@allseeingpinkey @Vixen95Trish @ThePNGuin Consciousness without a cerebral cortex: a challenge for neuroscience and medicine https://t.co/mRrB0Yh5EJ https://t.co/F5JTVF5P1i

Jun 8, 2024 · 2 likes · 3,891 followers View post →
Swan on a Bike
@RichardSwan1982 · X

Turns out humans can do quite a lot with a cortex... consciousness is fascinating https://t.co/Zkl4UJGDfa

Feb 26, 2024 · 1 like · 408 followers View post →
Lars Chittka
@LChittka · X

@____BRODIE____ @markianrubin @maartengm @WKCosmo @skdh Sure, will send some things over the coming days. Popular scientific ones, or original articles? On consciousness requiring a cortex, this is a good starting point: https://t.co/BctKG7Y0be

Sep 1, 2023 · 1 like · 7,358 followers View post →
Heather Leisure, NSPM-7 Wrongthinker
@LeisDuch · X

@ScottMatte @naught_ewe @Maximumatheist Idk most of them die early The brainstem is critical to consciousness. People have been focusing on the cortex bc that’s what makes us really smart especially with memory, but mere consciousness is more basic than memory. https://t.co/7fpq5SPj6f

Jul 31, 2023 · 2,355 followers View post →
Citizen Dan
@danielposnermd · X

@GaryMarcus @WiringTheBrain @TonyZador @anne_churchland @Nancy_Kanwisher @PessoaBrain @neurograce According to the “centrocephalic” perspective, the brain stem is calling the shots, not just dragging its knuckles. https://t.co/Qrfd1ur2Ff

May 4, 2023 · 424 followers View post →
Kiwi la Jarocha
@KiwiQueenieTw · X

@PonyMagno @felipeclgt95 @lobthemagical @ricarparr1 @cold_good_coffe @Galax_Francisco @drluchito @dra_kappopa @CristianXavierQ Una página para pacientes de la CDC no es una buena fuente para estos asuntos. https://t.co/c12J2cgqJL https://t.co/uCTcVxU3ao

Apr 6, 2023 · 5 likes · 1,149 followers View post →
Mac Shine
@jmacshine · X

RT @danlei_chen: @jmacshine @pianozack @MillerLabMIT @DrYohanJohn Sounds like both SC removal and SC-adjacent fiber cuts will do! Quote is…

Feb 6, 2023 · 1 share · 3,945 followers View post →
Danlei Chen
@danlei_chen · X

@jmacshine @pianozack @MillerLabMIT @DrYohanJohn Sounds like both SC removal and SC-adjacent fiber cuts will do! Quote is from this masterpiece by Bjorn Marker: https://t.co/8cKe5O9lba

Feb 6, 2023 · 5 likes · 1 share · 132 followers View post →
Aravind V
@Appoota · X

@garylfrancione @GntherM88118872 https://t.co/3iLl2y9YRF https://t.co/FbLvpnR19g

Feb 1, 2023 · 338 followers View post →
Open 2 Discussion
@to_discussion · X

@deuslapis @pinkheretic That seems an overly simplistic guide and definitely not an objective test of consciousness. https://t.co/mRrB0YhDuh https://t.co/LwLMl0THBu

Jan 28, 2023 · 1 like · 3,891 followers View post →
@nicolaskuske.bsky.social
@nicokuske · X

@keithfrankish Not famous enough: Merker, B. (2007). Consciousness without a cerebral cortex: a challenge for neuroscience and medicine. Behavioral and Brain Sciences, 30(1), 63-81. https://t.co/m7MlBIJsXt

Nov 22, 2022 · 12 likes · 93 followers View post →
Avi Bitterman, MD
@AviBittMD · X

Paper 2: https://t.co/BeLgcFvz4G

Jul 17, 2022 · 11 likes · 26,143 followers View post →
Verôtica
@OPJelloBear · X

@_LibertyWallace @OneDakineHowlie @BryanBikesLV @Booker4KY I won’t waste my time explaining the nervous system vs high cortex functioning. If you know you know. But one item that I had hope in was “Consciousness without a cerebral cortex: A challenge for neuroscience and medicine” but even they say: https://t.co/hDI4IS5C8Y

Jul 10, 2022 · 114 followers View post →
Avi Bitterman, MD
@AviBittMD · X

@ErikPharminger @TheOmniLiberal "Consciousness without a cerebral cortex: a challenge for neuroscience and medicine - PubMed" https://t.co/BeLgcFvz4G

Jul 9, 2022 · 3 likes · 26,143 followers View post →
Beverly Nuckols, MD
@bnuckols · X

@ImLaurieS @Krispi_Largo @dcffk @SouthernUntidy @Kuntrella @shutup_m3g @Aiyah02436291 @SierraDeciduous @annaeck73 @AndrewA03550025 @XCruzaderX @tmccartyreleng @Groucholiz @Peachfu08019815 @smashli1228 @EmmaJClemmons @impeachqueen @MickVillene @dirk_fasshauer @in_the_sky34221 @Aliphaire @FlipperTGibbit @unionwoman226 @whymaja @MansplainingAb1 @ProLife_Julie @incompleteocean @Aditya88785137 @strictlyRhythm_ The point is that we are still learning even about anatomy, & understanding about behavior lags behind. For instance some anencephalichumans display consciousness that can't be explained by the cortex. https://t.co/CjgpyWjzgI

May 1, 2022 · 1 like · 2,043 followers View post →
"Lovable Menace" Mr. Brass
@BrassVon · X

RT @MgtowRadical: @AlottaBeaverHo @Phredreeke @JASB1001 @SlaggitySlag @baze95181911 @JohnDavisJDLLM @AfriKoids_Only @JohnathonDoeman @Candy…

Dec 28, 2021 · 2 shares · 881 followers View post →
Hannah Wallen | Too Dangerous For #Facebook!
@Oneiorosgrip · X

RT @MgtowRadical: @AlottaBeaverHo @Phredreeke @JASB1001 @SlaggitySlag @baze95181911 @JohnDavisJDLLM @AfriKoids_Only @JohnathonDoeman @Candy…

Dec 27, 2021 · 2 shares · 12,431 followers View post →
Radical MGTOW
@MgtowRadical · X

@AlottaBeaverHo @Phredreeke @JASB1001 @SlaggitySlag @baze95181911 @JohnDavisJDLLM @AfriKoids_Only @JohnathonDoeman @CandySmith74 @Tekla_Too @AlphaLackey @melliflora @maqart55 @Oneiorosgrip @vixmcintyre @JazhuStreaming @MomOfIrishTwin You understand the difference between an assumption and a scientific theory, right..?! https://t.co/hUQBHoRRSY

Dec 27, 2021 · 1 like · 2 shares · 1,549 followers View post →
Jose Ahumada
@Josevahu · X

@JohannesKleiner Consciousness without a cerebral cortex: A challenge for neuroscience and medicine Bjorn Merker

Sep 5, 2021 · 4 likes · 89 followers View post →
Avi Bitterman, MD
@AviBittMD · X

The idea that a cerebral cortex is required for sentience (understood as having any conscious experience) is just laughable. Some studies on the topic: 1) https://t.co/n2Z3GG33l1 2) https://t.co/OHdABXhZOl

Jul 3, 2021 · 17 likes · 2 shares · 26,143 followers View post →
LAUREL
@LAUREL_LR · X

@hugo_pena4 @Rafael_Gar03 Se ha observado que los niños con hidranencefalia exhiben todas las respuestas a estímulos dolorosos que esperar de los niños ‘normales’ https://t.co/9JdhV9sPlI

Mar 5, 2021 · 1,350 followers View post →
Anderson Fonseca
@AndydeFonseca · X

Consciência sem córtex cerebral https://t.co/FHbOcI0zXV

Nov 18, 2020 · 314 followers View post →
Charlie Camosy
@CCamosy · X

@ThunderStorm209 @savvymegs @AllardKent @KeeponSmiling80 I'm afraid you just don't know the science on this. https://t.co/s1VYyWu9EH

Jul 5, 2020 · 12,902 followers View post →
Behav. Brain. Sci.
@BBSJournal · X

RT @SimsYStuart: “This upper brain stem system retained a key role throughout the evolutionary process by which an expanding forebrain – cu…

Nov 24, 2019 · 1 share · 7,855 followers View post →
Stuart Sims
@SimsYStuart · X

“This upper brain stem system retained a key role throughout the evolutionary process by which an expanding forebrain – culminating in the cerebral cortex of mammals – came to serve as a medium for the elaboration of conscious contents.” https://t.co/Dujg7jXTUY

Nov 20, 2019 · 3 likes · 1 share · 2,403 followers View post →
Stuart Sims
@SimsYStuart · X

@aina_puce @smellosopher Weird. I just finished this paper before I opened Twitter and saw this post. Freak’n glitch in the Matrix. smh. https://t.co/Dujg7jXTUY

Nov 19, 2019 · 2,403 followers View post →
عَيّاض
@AyadQadi · X

وأصبح عندنا حالات لكثير من الأطفال يولدون بدون قشرة مخية Cerebral cortex (المفترض أنها أهم جزء لتوليد ما نسميه الوعي) مصابين بمرض إستسقاء المخ الشديد Hydranencephaly ، مولودين بالمخيخ وجذع المخ فقط تقريبا ومع ذلك الوعي ما زال موجود. https://t.co/NARWUFLH7f

Oct 30, 2019 · 1 like · 315 followers View post →
Ance Tetere
@ancetetere.bsky.social · Bluesky

Not much brain is needed for you to be a conscious being https://www.cambridge.org/core/journals/behavioral-and-brain-sciences/article/consciousness-without-a-cerebral-cortex-a-challenge-for-neuroscience-and-medicine/C9B1B393176EF250D4AFBB3054A04E31 -

Nov 12, 2016 View post →
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