The collection shows a broadly aligned, high-interest, and highly engaged discussion that treats the corrected neuron counts as important. Posts cite the 86.1 billion figure, challenge the old 100 billion idea, and use corrective language (e.g., stop perpetuating neuro-myths) to frame the brain as essentially a scaled-up primate, with cross-language and cross-platform uptake illustrating its potential impact.
AgreementStrong agreement
The bulk of posts endorse the corrected neuron counts (≈86B neurons and similar glial counts) and push back against the 100B myth, showing strong alignment with the article’s findings.
InterestHigh interest
There is high curiosity and active sourcing (citations, cross-language posts, and mentions of specific studies) indicating significant interest in the revised numbers.
EngagementHigh engagement
Posts are not merely reposts; they actively argue, question, translate, cite sources, and urge correction, reflecting deep engagement across discussions.
ImpactHigh impact
The repeated emphasis on correcting a widely held belief and linking to primary sources suggests a meaningful potential shift in public understanding of brain anatomy.
Abstract in brief
The human brain has around 86.1 billion neurons and 84.6 billion nonneuronal cells, contradicting the belief of 100 billion neurons.
The cerebral cortex, accounting for 82% of brain mass, contains only 19% of all neurons, suggesting that increased size doesn't mean more neurons in comparison to other primates.
Overall, the human brain’s cell ratios are similar to those of other primates, indicating that our brain composition is essentially a scaled-up version of a typical primate brain.
Tu cerebro nunca deja de cambiar. Esto ocurre de manera literal y física cada vez que aprendes algo nuevo.
Durante años se creyó que teníamos 100 mil millones de neuronas. Los conteos precisos demostraron que tenemos en promedio 86 mil millones.
Sin embargo, el secreto de tu https://t.co/wi6gouNGlv
May 8, 2026 · 190 likes · 57 shares · 530,969 followersView post →
CB
Comunidad Biológica
@Bio_comunidad · X
Tu cerebro nunca deja de cambiar. Esto ocurre de manera literal y física cada vez que aprendes algo nuevo.
Durante años se creyó que teníamos 100 mil millones de neuronas. Los conteos precisos demostraron que tenemos en promedio 86 mil millones.
Sin embargo, el secreto de tu https://t.co/MPAwgzdCT3
May 3, 2026 · 129 likes · 49 shares · 530,969 followersView post →
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Next Science
@NextScience · X
? THE ELECTRICAL UNIVERSE INSIDE YOUR HEAD NEVER STOPS
Your brain may look quiet from the outside… but inside, it is constantly alive with electrical activity.
Your brain contains about 86 billion neurons, sending tiny electrical signals through a vast network of https://t.co/NgM5m8NsJu
Hey @nature -- let's stop perpetuating neuro-myths. Suzana Herculano‐Houzel counted how many neurons are in the human brain 10 years ago. We have approximately 86 billion, not 100 billion. https://t.co/eJzX68foX9 https://t.co/d0OqjrxDCg
Nov 4, 2019 · 35 likes · 5 shares · 16,655 followersView post →
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Adnan Şimşek
@adnansimsek111 · X
Kum Tanesine Sığdırılan Şehir
Meyve Sineğinin Beynindeki Bağlantı Mühendisliği
“İnsan, meyve sineğinin beynindeki yolları yıllarca haritaladı;
sinek, o yollar bedeninde kurulmuş olarak uçmaya başladı.”
⋯ ❖ ⋯
Kum Tanesinden Küçük Bir Şehir
Bir an için, kum tanesinden küçük https://t.co/pcuP3i2n4k
Aug 9, 2026 · 15 likes · 10 shares · 3,308 followersView post →
BN
@BioAI_Neuro
@BioAI_NeuralNet · X
https://t.co/S2dJn1lzU1
Jun 27, 2026 · 14 likes · 7 shares · 16,572 followersView post →
How can one transfer consciousness into a computer? Futurists believe this may soon be possible, but the exact technology remains unclear. This video explores the scientific feasibility and current research in…
The human brain contains approximately 86.1 billion neurons and 84.6 billion nonneuronal cells. This challenges the previous belief of 100 billion neurons, highlighting that our brain's cell composition is similar to…
Recent research reveals that brain size alone doesn't determine neuron count. The human brain has about 80% of neurons outside the cerebral cortex, following primate scaling rules, making it efficient but not uniquely…
New findings show the human brain has about 86.1 billion neurons and 84.6 billion nonneuronal cells. The cortex accounts for 82% of brain mass but only 19% of neurons, indicating our larger brain is a scaled-up primate…
Explores how human cortical organoids develop electrical activity over months, with oscillations driven by glutamate and GABA. The transition from regular to irregular, synchronized waves mirrors preterm brain patterns…
The human brain contains approximately 86 billion neurons and a similar number of nonneuronal cells, challenging previous beliefs. The cerebral cortex makes up most of the brain mass but contains fewer neurons…
An estimated 30 trillion cells in a 70 kg adult, with 84% red blood cells. The brain’s cell counts align with primates: about 86.1 billion neurons and 84.6 billion nonneuronal cells, indicating a scaled primate brain…
Examines empirical support for higher-order theories of consciousness, contrasting with first-order and recurrent processing views, and addressing criticisms about prefrontal activity and awareness.
Neironu skaits nav intelekta mērvienība
Grāmatās bieži lasāms, ka cilvēka smadzenēs ir 100 miljardi neironu. Viens no plaši izmantotajiem mūsdienu aprēķiniem ir aptuveni 86 miljardi.
Tomēr neironu skaits pats par sevi nepasaka, cik labi cilvēks domā, māc
https://t.co/338aNJWeLy
@neuralink REFERENCES
¹ Wolpaw, J. R. et al. (2002). “Brain-computer interfaces for communication and control.” Clinical Neurophysiology, 113(6), 767–791.
² Sandberg, A. & Bostrom, N. (2008). Whole Brain Emulation: A Roadmap. Technical Report, Future of Humanity Institute, University of
? THE ELECTRICAL UNIVERSE INSIDE YOUR HEAD NEVER STOPS
Your brain may look quiet from the outside… but inside, it is constantly alive with electrical activity.
Your brain contains about 86 billion neurons, sending tiny electrical signals through a vast network of https://t.co/NgM5m8NsJu
Kum Tanesine Sığdırılan Şehir
Meyve Sineğinin Beynindeki Bağlantı Mühendisliği
“İnsan, meyve sineğinin beynindeki yolları yıllarca haritaladı;
sinek, o yollar bedeninde kurulmuş olarak uçmaya başladı.”
⋯ ❖ ⋯
Kum Tanesinden Küçük Bir Şehir
Bir an için, kum tanesinden küçük https://t.co/pcuP3i2n4k
Aug 9, 2026 · 15 likes · 10 shares · 3,308 followersView post →
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Netochka Nezvanova, menos 3%
@NetNezva · X
twitter es servicio; pido ayudita profesional (/cc @Moli_Malone @ArielBiologist ):
¿número medio de neuronas en el cerebro humano? ¿hay algo concluyente?
describo mejor:
* a partir de Azevedo et al. (2009), doi:10.1002/cne.21974, 8.61 ± 0.81 × 10¹⁰ es un número muy citado;…
Aug 6, 2026 · 2 likes · 5,552 followersView post →
BN
@BioAI_Neuro
@BioAI_NeuralNet · X
https://t.co/S2dJn1lzU1
Jun 27, 2026 · 14 likes · 7 shares · 16,572 followersView post →
CB
Comunidad Biológica
@Bio_comunidad · X
Tu cerebro nunca deja de cambiar. Esto ocurre de manera literal y física cada vez que aprendes algo nuevo.
Durante años se creyó que teníamos 100 mil millones de neuronas. Los conteos precisos demostraron que tenemos en promedio 86 mil millones.
Sin embargo, el secreto de tu https://t.co/wi6gouNGlv
May 8, 2026 · 190 likes · 57 shares · 530,969 followersView post →
CB
Comunidad Biológica
@Bio_comunidad · X
Tu cerebro nunca deja de cambiar. Esto ocurre de manera literal y física cada vez que aprendes algo nuevo.
Durante años se creyó que teníamos 100 mil millones de neuronas. Los conteos precisos demostraron que tenemos en promedio 86 mil millones.
Sin embargo, el secreto de tu https://t.co/MPAwgzdCT3
May 3, 2026 · 129 likes · 49 shares · 530,969 followersView post →
SM
Srini Metta
@InvestorTechie · X
#BrainDaily #Neuroscience
? The Cerebellum
The brain's hidden maestro doesn't just coordinate your body — it quietly shapes your thoughts and emotions too.
For most of neuroscience history, the cerebellum — that dense, cauliflower-shaped structure tucked at the back of your
@xwwrx هذه خلية عصبية واحدة من نحو 86 مليار خلية في الدماغ البشري.
وكل خلية منها يمكن أن ترتبط بآلاف الخلايا الأخرى، مكوِّنة شبكة تحتوي على تريليونات الوصلات العصبية.
المفارقة العجيبة:
هذا التعقيد الهائل موجود داخل رأس الإنسان…
لكن كثيرًا من الناس يستخدمون منه جزءًا ضئيلًا فقط للتفكير
From https://t.co/W5osq2JSNf
Wild to consider that so many neurons out of the total are in the cerebellum + the cerebellum has a tiny amount of non-neuronal cells compared to the cortex
Apr 9, 2025 · 1 like · 21,809 followersView post →
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Elena Shekhova
@lumipie.com · Bluesky
Thank you for sharing! Lots of useful info. I especially liked the example of the scatterplot with brain size and neuron count.
Then I somehow came across a comment on PubPeer about estimating the number of neurons. What a hard question to tackle!
pubpeer.com/publications...
La neurocientífica Suzanna Herculano-Houzel y su equipo calcularon que un cerebro humano promedio contiene unos 86 mil millones de neuronas: onlinelibrary.wiley.com/doi/abs/10.1...
Como el número de neuronas no predice bondad, empatía, inteligencia, etc.
RT @NeuroSGS: Despite having 86 billion neurons (and 84 billion non-neuronal cells) within the brain, only 19% are located in the cerebral…
May 24, 2023 · 1 share · 5,338 followersView post →
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Sammy
@NeuroSGS · X
Despite having 86 billion neurons (and 84 billion non-neuronal cells) within the brain, only 19% are located in the cerebral cortex. The vast majority are found in the cerebellum (important in balance, co-ordination, and fine motor movements):
https://t.co/p15K8uTNMF
May 24, 2023 · 10 likes · 1 share · 12,133 followersView post →
TG
The hot taker general
@hottakergeneral · X
@0xfbifemboy human brains built from monkey brains by adding more layers
https://t.co/KWB9HT5HjY
Wirst du jemals dein Bewusstsein hochladen können? Wir haben unseren Neurobiologen @DennisEckmeier gefragt und seine Antwort ist: "Jain!"
Mehr dazu im neuen Video: https://t.co/jrDPOCMA34 https://t.co/BSukBCtJ2H
Dec 11, 2022 · 8 likes · 1 share · 5,693 followersView post →
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Neuropsicologo
@CHRISTIANGEL76 · X
RT @VielightInc: The human brain is amazing and incredibly complex. The brain's storage is hypothesized to be virtually unlimited from a ph…
On where to publish: Science rejected, after review, my paper on # of neurons in the human brain. This paper, published in 2009 by JCN, has been cited over 1k times, over 2k acc to google scholar. I am devilishly happy that JCN is getting the citations. https://t.co/s1lWgiNNDV
Jun 24, 2022 · 6 likes · 10,237 followersView post →
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peterjtherriat
@PeterJTherriat · X
RT @amandameyerphd: <1% of brain neurons are in the thalamus and top of brainstem.
19% of brain neurons are in the cerebral cortex.
80% o…
RT @amandameyerphd: <1% of brain neurons are in the thalamus and top of brainstem.
19% of brain neurons are in the cerebral cortex.
80% o…
Jan 14, 2022 · 5 shares · 3,582 followersView post →
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Abdulaziz
@MzhaAl · X
RT @amandameyerphd: <1% of brain neurons are in the thalamus and top of brainstem.
19% of brain neurons are in the cerebral cortex.
80% o…
Jan 14, 2022 · 5 shares · 591 followersView post →
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Dr Amanda J. Meyer @amandameyerphd.bsky.social
@amandameyerphd · X
RT @amandameyerphd: <1% of brain neurons are in the thalamus and top of brainstem.
19% of brain neurons are in the cerebral cortex.
80% o…
Jan 14, 2022 · 5 shares · 4,127 followersView post →
DS
Dr Amanda J. Meyer @amandameyerphd.bsky.social
@amandameyerphd · X
<1% of brain neurons are in the thalamus and top of brainstem.
19% of brain neurons are in the cerebral cortex.
80% of brain neurons are in the cerebellum.
DOI: 10.1002/cne.21974
#neuroanatomy https://t.co/QUlHow2hXs
Jan 14, 2022 · 13 likes · 5 shares · 4,127 followersView post →
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Yannick Vermeiren
@YannickVermeir1 · X
@BohacekLab I also refer to this paper each time https://t.co/sVCstXvAWW
@MicieliA_MD @KirstyChallen @EMS1 @hp_ems @EMSWorldOFCL @DrHowieMell @ZoiNetou @First10EM @broomedocs Many questions related to the 1st comment on time:
- Ref for 2mil/min?
- There are ~86 billion neurons
- # neurons lost to be clinically relevant?
- Where do they need to be lost?
- Can tPA restore flow?
- Will flow improves function?
- What about harms?
https://t.co/L7WPmtf99D
Large interindividual differences in neuron count (+- 5%). N=4 in this study (which is the first and only to have measured it this accurately) so it's probably much larger than that. Subjects are Brazilian males 50-90 yo, no ethnicities specified.
https://t.co/Brzejcx1Af https://t.co/29WL7BBpBc
May 5, 2021 · 5 likes · 1 share · 185 followersView post →
EM
Elia Magrinelli
@EliaMagrinelli · X
Neurons are about 50% of all brain cells (https://t.co/JdllCBlCyX). Almost all neurons except Granule cells in the cerebellum are generated before birth, but Granule cells are 80% of all neurons and at birth.
Apr 15, 2021 · 1 like · 1,046 followersView post →
封
封書を投函する
@triste_trieste · X
860億の根拠はこれか？
Equal numbers of neuronal and nonneuronal cells make the human brain an isometrically scaled-up primate brain - PubMed https://t.co/o7eQ4aD0CG
@BlancheEllisArt Aquí lo tienes. Es un descubrimiento genial de @suzanahh y su equipo en 2009
https://t.co/hupHqt8MTj
Artículo de revisión:
https://t.co/NRklvGGnTc
Mar 15, 2021 · 1 like · 1,268 followersView post →
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Aashim Bhatia, M.D., M.S.
@draash · X
The best answer is 100 billion neurons in the human brain based on this paper
"We find that the adult male human brain contains on average 86.1 ± 8.1 billion NeuN‐positive cells (“neurons”) and 84.6 ± 9.8 billion NeuN‐negative (“nonneuronal”) cells."
https://t.co/Tajvg98swq
Dec 9, 2020 · 2 likes · 4,316 followersView post →
JK
Josh Kornbluth
@joshkornbluth · X
RT @grinberg_t: This is a non-brainer. Lent and Azevedo showed years ago that half of the neurons in the human brain seats in the cerebellu…
Oct 13, 2020 · 1 share · 1,460 followersView post →
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Lea T. Grinberg, M.D, Ph.D
@grinberg_t · X
This is a non-brainer. Lent and Azevedo showed years ago that half of the neurons in the human brain seats in the cerebellum https://t.co/xCT6RNZ5WX
We don't need almost 50 billion brings just to keep balance. Glad that message is coming out @ https://t.co/LCxJ8FG95D
Oct 13, 2020 · 13 likes · 1 share · 3,197 followersView post →
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Florian Magin
@0x464D · X
@gsuberland Ah, the paper that established the 86 billion neurons also has the other relevant numbers:
"We find that the adult
male human brain contains on average 86.1 +- 8.1 billion
neurons 84.6 +- 9.8 billion nonneuronal cells." https://t.co/qyloImKMxh
Hey @nature -- let's stop perpetuating neuro-myths. Suzana Herculano‐Houzel counted how many neurons are in the human brain 10 years ago. We have approximately 86 billion, not 100 billion. https://t.co/eJzX68foX9 https://t.co/d0OqjrxDCg
Nov 4, 2019 · 35 likes · 5 shares · 16,655 followersView post →
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