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/sci/ - Science & Math

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5525835 No.5525835 [Reply] [Original]

I'm trying this once more. Today's thread is about brain waves. Ask questions about them, discuss them, and appreciate them (or not) here. I'll be around for a short while.

>What are brain waves?
Brain waves - or, neuronal oscillations - are rhythmical fluctuations in the excitability of populations of neurons. In other words, groups of neurons alternate in the likelihood of firing. This can be measured from up close, or from outside the skull, as waves in the voltage potential.

>> No.5525841 [DELETED] 

Which brain waves are responsible for free will and qualia?

>> No.5525849 [DELETED] 

>>5525841
aaand thread over.

>> No.5525851

Can brain waves be created outside of brains? For example in the air? Can they be used for telepathic communication?

>> No.5525854

Does the hippocampus exhibit a particular kind of wave?

>> No.5525859

I'm sorry OP, you tried.

>> No.5525861

>>5525851
>Can brain waves be created outside of brains? For example in the air?
What is causing brain waves is changes in voltage potential of populations of neurons. That can be artificially induced by magnetic induction, a technique which is known as transcranial magnetic stimulation (TMS), or by transcranial alternating current stimulation (tACS). Although the mechanism that is directly responsible for the oscillation (the aforementioned techniques) is outside of the brain, the reach is very limited, and apparatus may even require direct contact with the scalp.

>Can they be used for telepathic communication?
Well, no.

>> No.5525864

>>5525854
Yes, both theta and gamma frequencies are particularly prominent in the hippocampus during wakefulnesses. Some (e.g. Buzsaki) have suggested that theta/gamma phase precession underlies the encoding of spatial location.

During sleep, slow-wave oscillations (<1Hz) and sleep spindles (~12Hz) may also become apparent.

>> No.5525867

Could brain waves be caused by a soul / consciousness?

>> No.5525870

>>5525835
how much do you hate star-trek?

>> No.5525871

Which neuronal process gives rise to phenomenal experience (qualia) and how can this be tested scientifically?

>> No.5525875

>>5525870
Don't really see how it's relevant, but to be honest, I actually used to be a bit of a fan (of the series with Patrick Stewart that is).

>> No.5525873

How do you feel about idiots who mistake neurosciencce for metaphysics?

>> No.5525874
File: 39 KB, 228x166, 1346182973768.png [View same] [iqdb] [saucenao] [google]
5525874

>>5525867
Why do you <span class="math">always[/spoiler] space before and after your slash?

>> No.5525876

>>5525874
Because it is syntactically correct.

>> No.5525877

Has dualism been disproved yet?

>> No.5525878

>>5525876
Yeah, if you're a fucking poet.

>> No.5525882

>>5525878
What's wrong with poetry? Is it too intellectual for you?

>> No.5525888

ITT: OP _doesn't_ answer questions.

>> No.5525890

>>5525882
Surprising to hear you think something other than science and math isn't infantile.

>> No.5525892

>>5525890
How is it surprising? I'm a polymath.

>> No.5525897

>>5525892
>I'm a troll.
A shitty one at that

>> No.5525895

>>5525888
Doesn't answer your* questions.

>> No.5525901

>>5525895
Why not? Are you lacking the neuroscience education to answer them?

>> No.5525903

>>5525897
Your a troll? Cool story, /b/ro.

>> No.5525907

>>5525901
No, I'm just waiting for honest and sincere questions.

>> No.5525910

>>5525907
Those are honest and sincere science questions. Are you saying consciousness isn't topic of neuroscience?

>> No.5525912

>>5525875
i ask because star-trek (especially tng) seems to me to have helped to popularize the metaphysical interpretation of brain waves quite a bit

the view/misconception of brainwaves not as mere diagnostic tool but source/essence of mind/consciousness

which i assume is part of the reason you created this thread

>> No.5525914 [DELETED] 

>>5525907
You won't get any. Welcome to /sci/
>>5525910
>>>/x/

>> No.5525918
File: 1.80 MB, 282x257, 1360471852996.gif [View same] [iqdb] [saucenao] [google]
5525918

>>5525910

>> No.5525923

Explain the pic in the OP please. What am I looking at here?

>> No.5525926

>>5525923
I'm not sure where I got the picture from (I've had it on my computer for a while), but it's meant to show how visual cortical rhythms such as alpha can govern sensory selection. On the left side there is low alpha power, which means that irrespective of phase of the ongoing oscillation the sensory input gets processed. On the right side, there is high alpha power, which means that stimuli arriving in a phase where excitability is low (red marked area) are less likely elicit further processing.

>> No.5525933

would you say the sound of an engine is a suitable analogy for brainwaves and their use?

>> No.5525935

>>5525926
Answer my questions.

>> No.5525936

>>5525933
Why?

>> No.5525945

Give us a scientific answer: Is consciousness / qualia / soul a subject of neuroscience?

Yes or no?

>> No.5525953

>>5525945
not op, but

yes(with restrictions) / no / no

>> No.5525959

>>5525953
That's not an appropriate answer. Those are synonyms. You cannot say "yes" to some of them and "no" to the others. Please answer with a global yes or no.

>> No.5525962

>>5525953
Consciousness implies qualia, you silly troll.

>> No.5525965

I get what brain waves are, but what do they do? Do they have a function in the brain?

>> No.5525966

>>5525953
>yes(with restrictions

With what restrictions? With the restrictions that it actually isn't?

>> No.5525967

>>5525959
>Those are synonyms

nope

>> No.5525981

>>5525966
only for subjects able to report their experiences

and only regarding to presence/absence and not it's content (qualia)

>> No.5525982

>>5525967
Way to show your lack of education.

>> No.5525988

>>5525981
What you describe has nothing to do with soul / consciousness. Try again, /x/tard.

>> No.5525991

>>5525835
Could you tell me a bit on what synchronous neural oscillations can teach us about the brain? I'm still just a psych student, but will probably be doing some EEG next year.

>> No.5525998

>>5525965
Good question, and to be honest, there's no clear consensus. The functional significance of oscillations is still a matter of ongoing debate, but and there is convincing evidence either way. Like I mentioned before, Buzsaki et al have argued that theta/gamma coupling and phase precession govern encoding of spatial information. Genetic deactivation in mice of the expression of the mechanisms that lead to the development of GABAergic interneurons (which drive gamma rhythm) leads to an abolishment of hippocampal gamma. This in turn leads to severe decrements in spatial navigation of these organisms. Optogenetic entrainment of hippocampal gamma and theta on the other hand leads to improved spatial navigation performance, which is a strong argument in favor of the functional relevance of these rhythms.

On the other hand, some have argued that oscillations may be merely epiphenomenal (a process which is the result of some other, underlying, process). Medial frontal theta rhythm for instance has been related to cognitive control and behavioral adaptation following errors, however, transcranially induced theta rhytm doesn't seem to improve or impair performance on tasks which measure this.

TL;DR: the evidence is mixed.

>> No.5526008

>>5525991
Is there anything in specific that you would like to know? You can write books about neuronal synchrony.

What are you interested in? The mechanisms that drive synchrony? What synchrony is or what it does?

>> No.5526023
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5526023

CNS I want to have your children

just fyi

>> No.5526035

This isn't about brain waves, and may not really be part of your field/research at all, but if it is what do you think about the glutamate theory of certain brain diseases (specifically Major Depressive Disorder) and the possible use of NMDA antagonists (Ketamine, etc) in treating MDD?

>> No.5526038

>>5526035
I'm sorry, but my work isn't related to anything clinical, so I'm afraid I can't answer your question as I'm not well read up on that literature.

>> No.5526043

>>5525998
>>5526008
>>5526038
Why are you avoiding the most important question?

>> No.5526054

>>5526008
For example, would observing synchronous oscillations in various locations across the brain give evidence that these areas share functional connectivity with regard to the task at hand? I know spatial resolution is really low, but I'm talking about for example visual areas and prefrontal areas in for example a stroop task.
Also, some info on the mechanisms that drive it wouldn't hurt, if you have the time for it.

>> No.5526060

>>5526023
Why would you want the children of a guy who is too incompetent to answer a simple question about whether something is or isn't subject of his field?

>> No.5526077

>>5526008
Also, do you know of some excellent in-depth books on EEG, MEG?

>> No.5526086

>>5526060
He's competent enough to recognize you as a troll. That's all I would need.

>> No.5526089

>>5526054
>For example, would observing synchronous oscillations in various locations across the brain give evidence that these areas share functional connectivity with regard to the task at hand?
As it's commonly viewed, yes. Most people define 'functional connectivity' though as nothing more than two regions covarying in their neuronal responses, which would be equivalent to synchrony. That doesn't say much about the actual, direct, coupling between regions though. For instance, region X and region Y may show the exact same oscillatory response, which would make them perfectly synchronous, and thus by definition, functionally coupled. It is still possible though that there is no actual information flow between region X and Y because they are both driven by region Z. This has led to the development of techniques such as Granger causality which infer directionality of information flow by temporal precedence. The justification for that would be that if region Z is responsible for the covariation of region X and Y, there should be little temporal lab between the oscillations of X and Y. If however, there is no region Z, and region X drives Y, then region Y should lag behind region X in its oscillations. Furthermore, the activity in region X should be predictive of the activity in region Y to a greater extent than the previous activity of region Y. With that in mind, there is substantial evidence that synchrony between DLPFC and MFC on the one hand, and visual/parietal cortex on the other hand, mediates cognitive control during the stroop task.

Hope that helps.

>> No.5526091

>>5526086
How am I "trolling"? I asked him a legitimate neuroscience question.

>> No.5526101
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5526101

>>5526091
Sure, but we all know who you are. Be more subtle.

>> No.5526106

>>5526077
What are you looking for? A book which describes methodologies and data analysis? To my knowledge, there's not really a good book on the market yet which explains anything beyond ERPs in depth. A little bird told me though that Michael X Cohen is writing one at the moment though. It'll be presented at the next SFN conference, and will be for sale after that.

If you're looking for something more conceptual, and explains the mechanisms behind and theory of oscillations, you should read rhytms of the brain, by Buzsaki.

>> No.5526107

>>5526101
>Sure, but we all know who you are.
Who am I?

>Be more subtle.
What do you mean? I directly asked him a question. Why should I make my question more subtle? I want a definite answer.

>> No.5526112
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5526112

>>5526060

You are just jealous of how handsome, charismatic and successful he is.

>> No.5526115

>>5526112
I don't know how he looks like and that's entirely irrelevant. I asked him a question concerning his field. He should be able to answer it. A simple "yes" or "no".

>> No.5526118

OP, are isochronic tones bullshit?

>> No.5526122

>>5526107
http://archive.installgentoo.net/sci/?task=search&ghost=yes&search_text=%22soul+%2F+consciousness%22

>> No.5526125

>>5526118
Supposedly it works by entrainment of oscillations via the auditory system, but the consequences of this entrainment are limited. Intrinsic neuronal oscillations are the product of specific cellular mechanics, each with their own topographical and frequency signature. Entrainment doesn't necessarily recruit the same processes simply because there is exogenous drive. The driving mechanism is different, and so the tonic neurochemical substrate is left unaltered. Furthermore, oscillations are only entrained in low level sensory areas and likely won't spread to areas where they'll have profound cognitive effects.

>> No.5526130

>>5526122
What's your point?

>> No.5526140

>>5526125
>claims to have a PhD in neuroscience
>can't even tell if something is or isn't neuroscience
Why do you keep trolling?

>> No.5526151

We'll, that wraps it up for tonight. Thanks for the interesting questions.

>> No.5526147

>>5526130
>having to ask
Point in case.

>> No.5526157

>>5526151
Way to dodge the most important question.

>> No.5526160

Hey CNS, good seeing you again.

Is there any progress on determining how micro scale patterns between neurons lead to behavior and thoughts, or are we still at the level of just observing macro scale parts of the brain light up?

What do you think about connectomes and the structure of the brain determining consciousness? What is stopping neuroscientists from determining what the nematode C Elegans does when we have a complete connectome of it's small brain?

>> No.5526162

>>5526106
>>5526089
Thanks for the info, much appreciated.

I'm curious, how do you feel about /sci/'s attitude towards psychology? I'm sure you've met and possibly worked with psychologists before. Based on that, do you feel the term pseudoscience applies to psychology?
I'm referring to the more research-based fields (experimental psych, neuro/cognitive psych, biological psych,...), not the applied clinical psychology stuff.

>> No.5526164

>>5526157
Indeed. He did good.

>> No.5526169

>>5526160
>What do you think about connectomes and the structure of the brain determining consciousness?

The troll is trying to be more subtle. lol

>> No.5526177
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5526177

>>5526169
Stop shitting up good threads.

>> No.5526183

>>5526177
I'm not the troll.

>> No.5526205
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5526205

The glorious king returns.

>> No.5526209

>>5526205
>2013
>worshipping a guy who doesn't know his own field
ishyshigggydy

>> No.5526213

>>5526209
your just mad that you didn't get to troll him faggot

>>5526125
>>5526089
>>5525998
looks to me like he knows his field pretty goddamn well

>> No.5526218

>>5526213
I don't want to "troll" anyone. I was asking a legitimate question. He should of answered it. I don't understand why he didn't.

>> No.5526228

>>5526218
he didn't because you're an obvious troll

as pointed out by prety much everyone here

>> No.5526230

>>5526218
>should of
Kill yourself.

>> No.5526238

>>5526228
Where do you think I'm "trolling"? I am not trolling. I was asking a legitimate question.

>> No.5526244

>>5526238
This is where you're trolling.

>> No.5526251

>>5526244
No, I'm not.

>> No.5526259

>>5526251
And this is where you're trolling.

>> No.5526260

>>5526259
I am serious.

>> No.5526264
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5526264

>>5526218
>I don't want to "troll" anyone
>I am serious

>> No.5526266

This is where you're also trolling.

>> No.5526269

>>5526266
Ok. You can stop shitposting.

>> No.5526285

>>5526269
You're the shitposter here you little faggot. You tried to ruin a perfectly good thread because you can't stand the fact that OP ignored your trolling garbage. And so you try to attack him personally because you're a vindictive little cunt. Don't try to hide your shit because we all know you're the shitposter troll who got told by CNS that one time.

>> No.5526298
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5526298

>>5526285
I'm not him, sperg. Just drop it already.

>> No.5526301

>>5526285
Looks like CNS got told ITT. How the fuck can he seriously claim to have PhD in neuroscience, if he can't even tell me if something is or isn't within the scope of neuroscience?

>> No.5526302

>>5526301
Shut the fuck up. He doesn't respond to trolls.

>> No.5526304

>>5526302
It was a legitimate question. No trolling.

>> No.5526305

>>5526301
Because the dude has some serious discipline and doesn't respond to delusional faggots like you.

>> No.5526307

>>5526305
How am I "delusional"?

>> No.5526309
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5526309

>>5526304

>> No.5526310

>>5526307
>How am I "delusional"?
>Looks like CNS got told ITT.
That's how you're delusional.

>> No.5526317

>>5526310
I asked him a simple question. He could of just answered "yes" or "no". He didn't. He avoided the question. Why did he do this? Because he doesn't know shit.

>> No.5526319

>>5526317
>He avoided the question. Why did he do this?
Like we said, because you're a trolling little faggot.

>Because he doesn't know shit
Buttmad with jelly. Read his posts you fucking moron.
>>5526125
>>5526089
>>5525998

>> No.5526322

>>5526319
I am not "trolling". I asked him a simple question. "Is ... subject of neuroscience?" As a PhD he should be able to answer with a yes or no.

>Read his posts you fucking moron.
None of these posts answers my question.

>> No.5526323

>>5526317
>Why did he do this? Because he doesn't know shit.
Quite the assumption there. What he does know is you have a propensity for trolling in regards to the subject and that you're liable to try and troll again.
Fuck this shit i'm out

>> No.5526326

>>5526322
>None of these posts answers my question.
That's because you're trying to troll him.

You already know his opinion about consciousness. Remember? When he ass raped you with superior knowledge after you tried to make an argument from authority?
https://archive.installgentoo.net/sci/thread/S5371780#p5372813

>> No.5526332

>>5526323
Calm down. It was an innocuous question.

>>5526326
I responded to his post back then and explained why he was wrong. Today he had the chance to explain his view. He didn't. Looks like he lost.

>> No.5526339

>>5526326
>getting into a long argument with someone you know is a troll
I hope you're a samefag arguing with yourself, because otherwise you're fucking retarded.

>> No.5526340

>>5526332
>Looks like he lost.
To you, but not to everyone else who is sane. Dumb faggot.

I'm out.

>> No.5526342

>>5526339
>I hope you're a samefag arguing with yourself, because otherwise you're fucking retarded.
Because arguing with oneself totally isn't retarded.

>> No.5526343

>>5526332
You told him to lurk more. How does that explain anything?

>> No.5526349

>>5526340
He didn't reply to >>5525910 where he got told.

>>5526343
That's not the only thing I told him.

>> No.5526355 [DELETED] 
File: 39 KB, 588x600, 588px-Paul_Feyerabend_Berkeley.jpg [View same] [iqdb] [saucenao] [google]
5526355

MUH SCIENCE

MUH NIHILISM

MUH PHYSICAL OBJECTIVENESS HURR MUH SCIENCE IS PERFECT MUH SCIENCE FUCK U MATHEMATICIANS, FUCK U PHILOSOPHERS, FUCK U SPIRITUALISTS

I SUCK ATHEIST COCK REGULARLY

DAWKINS IS MY GOD

REPLICATE REPLICATE REPLCIATE GO GENES GO

MUH REDCUOTNISM

FUCKIN DUALISTS

MY PARENTS MADE ALL THE DECISIONS FOR ME AND THAT'S WHY I NEVER HAD FREE WILL IN THE FIRST PLACE

FUCK U CHRISTTARDS

MUH SCIENCE

IF IT AIN'T PHYSICAL IT AIN'T OBJECTIVE - me the ultra-genius that has solved all humanity's problems and knows science is the light

MUH TRUTH

MUST MEASURE EVERYTHING

>> No.5526363 [DELETED] 
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5526363

>>5526355

>> No.5526368
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5526368

>mfw no /sci/ janitors still

>> No.5526372

>>5526368
Why would you expect a janitor to delete this thread?

>> No.5526379

>>5526355
complexism is worse than reductionism

>> No.5526376

>>5526372
too many shitposts

>> No.5526377

>>5526355
4 edgy6me

>> No.5526378 [DELETED] 
File: 12 KB, 299x169, images.jpg [View same] [iqdb] [saucenao] [google]
5526378

MUH BRAIN
MUH PEER STUDIES
MUH PEER PRESSURE
SUCK SCIENCE COCK REGULARLY AND YOU WILL BE OBJECTIVE!

FUCKIN RELIGION
FUCKIN DUALISTS

MUH BUDDHISM

STUDY DA BRAIN STUDY DA BRAIN STUDY DA BRAIN STUDY DA BRAIN STUDY DA BRAIN
MUH BRAIN WAVES MUH BRAIN SCANNERS I SEE CONSCIOUSNESS YOU CANT PROVE ME WRONG MUH ATHEISM MUH MATERIALISM I KNOW IT ALL

MUH DETERMINISM

REPLICATE
REPLICATE
REPLICATE
ONLY DAWKINS KNOWS!

FUCK MORALS

MUH SCIENCE

MUH OBJECTIVITY
MY SELF DOES NOT EXIST BUT SOMEHOW SCIENCE EXISTS BECAUSE SCIENCE IS GOD AND OBJECTIVE OBJECTIVE OBJECTIVE!

>> No.5526383 [DELETED] 

>>5526379
hell fucking no
you must take pinker seriously

>> No.5526393

>>5526378
>>5526355
/lit/ master race reporting in

>> No.5526399 [DELETED] 
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5526399

MUST BE RATIONAL
MUST BE RATIONAL
MUST BE RATIONAL
MUH RATIONALITY

FUCK WOMEN
I ONLY HAVE SEX WITH LOGIC AND OUR RELATIONSHIP IS MONOGAMOUS

MUH GENES
MUH BABYS REPLICATE BABYS REPLICATE BABYS REPLICATE

YOU ARE ILLOGICAL
ILLOGICAL
ILLOGICAL
ILLOGICAL
ILLOGICAL

PART ASIAN PART ROBOT

SCIENCE KNOWS ALL

OBJECTIVE
OBJECTIVE
OBJECTIVE

IF GENE WANT TO REPLICATE THEN HOW COME PHYSICS? HOW COME CHEMICALS? MUH SCIENCE MUH DAWKINS OBJECTIVE!

IT'S OBJECTIVE!

FUCKING RELIGIOUS DOGMA
SCIENCE DOGMA IS BEST DOGMA
MUH SCIENTIFIC DOGMA

>> No.5526400

>>5526355
>>5526378
And what's philosophy?

MUH INTUITION
MUH COGITO

MUH INTUITION
MUH COGITO

MUH INTUITION
MUH COGITO

>> No.5526409
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5526409

>>5526399
>implying science is dogma

Nice straw man, religitard. Science is open minded.

>> No.5526421 [DELETED] 

FUCK LITERATURE FUCK HISTORY STUPID HUMANS WE RATIONAL NOW PLATO IS A DUMBASS

I CAN ONLY READ NEUROSCIENCE TEXTBOOKS AND EVERYTHING ELSE I FAIL AT BECAUSE MUH SCIENCE

MUST TEST IT
MUH TESTS

IF I CANT SEE IT THEN IT ISN'T OBJECTIVE SO SAYETH ME AND LORD DAWKINS
MUH TOOLS OF MEASUREMENT
MUH SCIENCE

FUCKIN GHOSTS
FUCKIN SUPERNATURAL

MUH GENES

OBJECTIVE IS OBJECTIVE IS OBJECTIVE

EVERYTHING IS A SOCIAL CONSTRUCT BUT NOT SCIENCE SCIENCE IS A GIFT FROM THE UNIVERSE SO SAYETH LORD DAWKINS AND SAGAN
MUH SOCIAL CONSTRUCTS
MUH SCIENCE

FUCKIN HUMANS CANT COME UP WITH ANYTHING OBJECTIVE ONLY SCIENCE IS OBJECTIVE

MUH CONSTRUCTS
I HATE MAKING CHOICES THEREFORE NO FREE WILL

MY CHILDHOOD PASTOR BEAT ME FOR BEING A LITTLE QUESTIONING SHIT
HE SAID
ASK THE RIGHT QUESTIONS
AND I SAID
BUT MUH EINSTEIN

>> No.5526427 [DELETED] 

>>5526409
REPLICATE REPLICATE REPLICATE

ONLY DAWKINS KNOWS

MUH GENES
MUH SELFISH GENES

REPLICATE UNTIL THE END OF TIME

CONQUERING THE UNIVERSE
FUCKIN GENES

GENES HOW COME?
HOW COME GENES?
GENES DO THAT
GENES DO THIS
GENES MAKE TOO MANY AVAILABILITIES
THEY JUST WANNA REPLICATE

MUH SEXUAL SELECTION
MUH GENES
MUH SEXUAL DISPLAYS
MUH DETERMINISM
MUH HEALTHY GENES
GENES FIGHT AND DIE TO REPLICATE!
THE BATTLE CONTINUES

>> No.5526435

>>5526409
>Confusing what science should be with what science is

>> No.5526442

>>5526435
Read Dawkins. He explains what science is.

>> No.5526448 [DELETED] 

>>5526435
>>5526442
Shalom!

>> No.5526471
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5526471

>>5526355
>>5526378
>>5526399
>>5526421
>>5526427
Reading these posts decreased my IQ. Christfags are so incredibly stupid.

>> No.5526472 [DELETED] 

>>5526471
>uses christfag as an insult
>implies anon to be a christfag
>actually even says "christfag"

so ironic

>> No.5526478 [DELETED] 

>>5526471
>IQ
>meaning anything

MUH SKILL AT TAKING TESTS

>> No.5526493

>>5526472
>2013
>believing in a sky wizard

my sides

>> No.5526495

isn't a brain wave a poor representation? how do you know one wave wasn't from a collision of other brain waves?

>> No.5526499
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5526499

>>5526495
this is what happens when you only think from a wave mechanics standpoint.

>> No.5526508

>>5526499
What other standpoint do you want? A religious one? Don't make me laugh.

>> No.5527679

How does the arrangement of neurons affect brainwaves, if at all? Some disorders such as schizophrenia have neurons all jumbled up.

Think I got that from Sapolsky.

>> No.5528017

Goddamnit /sci/. Why don't we have proper janitors who can pick out the trolls and prevent ruining threads like this one...

>> No.5528109

>>5526342
>see thread on brain waves
>'oh, this looks interesting
>nothing but 'consciousness doesn't exist' troll posts
fuck this board.

>> No.5528453

>>5526508
idiot, you're not seriously suggesting that the electricity that comes from the power socket for instance is a mechanical wave, are you?

>> No.5530742

There are only certain kinds of brain waves and they are limited to a specific range of frequencies, right? How do neurons "know" about these frequencies in particular?

>> No.5530758

>>5530742
Better question- How are they able to do a controlled demolition to manufacture them @_@

>> No.5530781

Hey OP, will playing binaural beats help me study, or is it just placebo?

I'm trying this out: http://gnaural.sourceforge.net/