/sci/ - Science & Math

[Anonymous No.1883958]

QUICK! The main page is down so the newfags won't be able to get here!

POST SOME NEUROSCIENCE! (also, taking questions)

[None !ZB6kpElKD6 No.1883959]

And naturally, I forgot my tripcode

[None !ZB6kpElKD6 No.1883962]

I should have known the newfag filter would leave /Ψ/ completely deserted...

[Anonymous No.1883975]

what exactly makes you qualified to answer questions on neuroscience?

[Anonymous No.1883985]

How do I get an even more huge and powerful brain, like this guy? Are there supplements I can take?

[None !ZB6kpElKD6 No.1883991]

>>1883975
I have a BSc and work as a research assistant wile getting my MSc.
>>1883985
Plenty of glucose and exercise are good for your brain (it won't actually make it bigger though). Coffee or other caffeinated drinks are also a nice way to stimulate cognitive function. Don't over-do it though, amphetamines etc are bad in the long run.

[None !ZB6kpElKD6 No.1883992]

>>1883991
>I have a BSc and work as a research assistant wile getting my MSc.
In neuroscience, I might add.

[None !ZB6kpElKD6 No.1884004]

[Anonymous No.1884024]

>>1883992
so, you pretty much look up everything on wikipedia?

[None !ZB6kpElKD6 No.1884031]

>>1884024
Obviously. Not that wikipedia has very good articles on higher cognition etc, but still, over 9000 hours on google should answer any question.

But seriously, /sci/ is fucking empty. One fucking question...

[Anonymous No.1884036]

How can I conceal from my colleagues the true extent of my neuroplasticity and human performance research?

[Anonymous No.1884039]

I have come to the conclusion that excessive dopamine release makes me tired as fuck.

[None !ZB6kpElKD6 No.1884046]

>>1884036
I don't get it

>>1884039
How?

[Anonymous No.1884047]

Tell us about your research!

Wait, that's not a question. Will you tell us about your research?

[Anonymous No.1884052]

Any dopaminergic drugs I take make me drowsy as hell, especially Deprenyl.

[Anonymous No.1884054]

>>1884047
Sure, at the moment I'm working on a project investigating several hypotheses about the attentional blink. It's an interesting phenomenon that happens when people see a string of stimuli in rapid succession intermixed with distractors. If a distractor directly follows a stimulus, and that is in turn followed by another stimulus within a specific time window, people will often report not seeing the second stimulus. We're piloting a task at the moment in combination with EEG measurements. The task will be adapted and used in fMRI as well.

[None !ZB6kpElKD6 No.1884059]

>>1884054
damn tripcode
>>1884054
Do you take it as an anti-depressant?

[Anonymous No.1884073]

No. I was taking it for life extension but even doses as small as 1 mg affect me in drowsiness.

[Anonymous No.1884076]

How do emotions work? also how does memory work? what is cognitive science and what is its relationship with NEUROSCIENCE?

[Anonymous No.1884088]

>>1884054
Ooh, that sounds cool. What's the approximate time window? Are we talking minutes, second, milliseconds...? What are the possible explanations for it?

[Anonymous No.1884095]

>>1883958
Is it possible to stop the aging of brain?
How do we do it?

[Anonymous No.1884100]

I'm a psychopath.

I hear they can tell by how your brains responds to certain scans.

Is this true?

[None !ZB6kpElKD6 No.1884105]

>>1884073
What the hell? Do you have early onset Parkinson's or are you just really old? You do know taking dopaminergic drugs when there is actually nothing wrong with your dopamine system can damage it permanently right..?
>>1884076
>How do emotions work?
Big question. Each emotion has different neural substrates, and frankly, I don't know that much about it. Affect neuroscience is kind of a shitty field in my opinion with weird theories adopted from psychology.
>also how does memory work?
Also a big question, but I'll assume for a second you're talking about declarative memory (there are several types of memory).

Short term declarative memory is mediated by a structure called the hippocampus. When you perceive en event, the associated neural activity will encompass direct sensory activation, (eg, your retina, optical nerve, thalamic nuclei, optic radiation, visual- and association cortices). The perception of that event is essentially a combination of activation patterns in your brain. The hippocampus essentially connects these brain regions, so that when you recall the event, those area's involved in the perception become active again in a similar manner, only without the area's involved in direct sensation (eg, no retina and optical nerve etc). Over time these connections become less dependent on the hippocampus but form between the cortical areas directly. This is called long term memory.

>what is cognitive science and what is its relationship with NEUROSCIENCE?
Cognitive science is a broader field that aims to investigate cognition. It integrates neuroscience with other sciences like computer science for instance. Neural computation models are some of it's fruits.

[None !ZB6kpElKD6 No.1884118]

>>1884088
The window is about 100 milliseconds. Supposedly, the when the target item arrives in the visual cortex it activates a feed forward sweep of activation that captures attention. When the distractor arrives shortly afterwards, that activation is strongly inhibited, causing the second stimulus to be inhibited as well.
>>1884095
Not at present time. Several processes are at the basis of cognitive aging, and one is that we don't generally make a lot of new neurons (only in very limited amounts and restricted to plastic brain areas). In theory we could stop it by increasing neurogenisis and plasticity. This is easier said than done however.

[None !ZB6kpElKD6 No.1884125]

>>1884100
They can't tell with 100% accuracy of course, but generally psychopaths show markedly decreased activation of the amygdaloid complex when presented with shocking stimuli (eg: gore)

[None !ZB6kpElKD6 No.1884151]

This big wall of text seems to have scared everyone off. Let me compensate by posting a random picture in the form of a hair straightener.

[Anonymous No.1884182]

>>1884151
contributan

[Anonymous No.1884184]

>>1884100
>implying your actually a psychopath

[Anonymous No.1884187]

>>1884118
Hmm... so is there some underlying chemistry for the activation inhibition? Receptors being plugged up or something like that? (I'm thinking of something like retinal cells, which need time to reset between activation.) Is that something you're hoping to figure out? Or is the activation sweep something that isn't even confirmed yet? Is that why you're using EEG/fMRI measurements?

[Anonymous No.1884194]

>>1884187
Oops, meant to post a pic with that to draw people in... captcha got me again.

[v No.1884201]

It's been down the last 10 hours fagget

[Anonymous No.1884207]

newfag reporting in

I was able to get here using the /sci after the main page. Thanks to the group for making it easy to get to the scientific board so simply.

[None !ZB6kpElKD6 No.1884211]

>>1884187
Usually, when a stimulus is consciously perceived, there's a wave of activation going from simple to more complex areas in the cortex (the outside layer of the brain where a lot of stuff happens) and back from complex to simple areas. The inhibition comes from higher up cortical area's, so the retina isn't involved here. What we're hoping to find out is that it's actually the inhibition of higher up area's that is causing the disruption in processing of the second stimulus and not something else. We can disprove the idea if we can't observe any feed back activation with EEG. If we do find it, we have to exclude other mechanisms from deeper inside the brain (which you can't measure with EEG).

[None !ZB6kpElKD6 No.1884228]

>>1884194
thanks

[Anonymous No.1884233]

>>1884207
come in, sit down. We have a serious conversation on neuroscience here.

[Anonymous No.1884241]

>>1884201
nolifer detected

[None !ZB6kpElKD6 No.1884250]

I'm going for dinner, might be back to answer more questions later. Thanks to anyone asking a question or bumping the thread.

[NewFag4Life !!ckW8Fxj88gV No.1884266]

>>1884233
How can I go about having dreams where I talk to dead ancestors, and have sex with aliens on boards their starships while on the way to distant lands? BTW I want the aliens to look like Kylie Minogue in the "I Believe in You" video, and I want the song playing in the background the whole time. Is their some kind of perscription drug you guys are working on that would allow me to achieve this?

EDIT: Forgot my tripcode.

[v No.1884285]

>>1884241

school's boring ><

[Anonymous No.1884307]

>>1884266
I went 'wat' for a full 17 seconds.

[Anonymous No.1884310]

>>1884211
Ah, I get it. I wasn't asking if it was retinal specifically, but just if there was some sort of reset time on neurons firing which might be contributing to the effect. A timeline for a missed event might be: stimulus 1 -> neurons fire, starting activation wave -> stimulus 2 -> neurons reset -> stimulus 3 -> neurons fire. If 2 happened before the reset, then it would be missed. A simple chemical solution. But (if I have this right) you seem to be suggesting that there is something happening on a larger scale, where processing in the complex areas of the cortex is actively being fed back to inhibit the simpler areas. That is extremely cool.

[None !ZB6kpElKD6 No.1884567]

>>1884310
There is a period where neuron's have to be 'reset' and can't fire another action potential, this is called the refractory period. It's very short though, in the order of several milliseconds, so unlikely to be involved in the attentional blink.
>But (if I have this right) you seem to be suggesting that there is something happening on a larger scale, where processing in the complex areas of the cortex is actively being fed back to inhibit the simpler areas.
Exactly!
>That is extremely cool.
Glad you like it :)

[Anonymous No.1884716]

>>1884567
Explain the role of Mg+ ions in forming rudimentary memories in neural circuits and how this relates to connectionist models and PDP.