3.6 - Orientation Selectivity

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Күн бұрын

Пікірлер: 15

@8Dbaybled8D 4 жыл бұрын

Just reaching out Nancy to say thank you. I was born with some degree of seeing 'visual snow' and after taking LSD, which I still quite enjoy, it has definitely increased my perception of visual snow, but also had some weird effects on edge detection (straight lines widening) under stressful or creative periods. After watching these lectures, it is my belief that my V1 area is the reason for this, and it affects both the intensity and orientation of the perceived field. You might be wonder, do I feel damaged or discriminated? Not a chance. You have no idea what it's like to experience abstract art like this. Picasso, Pollock and Kandinsky all activate the V1 area in an extremely marked way now, in comparison to beforehand. I know this because during my first ever trip, I stopped and looked at a Kandinsky. Since that point in time, I always find particular artworks of his or other abstract artists to give a greater sense of meaning, as in, my brain in interpreting more data from one particular type of artwork in a unique way and I have associated more meaning with that.

@jetmejia1058 3 жыл бұрын

tell me about it I have charles bonnet syndrome, all the flashing lines and colors in the air look awesome when im off of psilocybin

@martinfultot 2 жыл бұрын

I have to say, all the metaphors about a conscious homunculus somewhere downstream the brain, neurons liking instead of firing, etc. don't help at all. And to try to explain the tilt after effect without first explaining that there is refraction and lateral inhibition only makes students confused. And this is MIT...

@jamesswanson5829 Жыл бұрын

no one cares

@JanaHischi 2 ай бұрын

it works perfectly for me (a student), I only got it because of the metaphors and it made me less confused than the lectures in my native language. but thanks for sharing your opinion!

@NegashAbdu 17 күн бұрын

Nature is a smart scientist.

@drakonzebra 6 жыл бұрын

Can somebody explain 10:55? Why are the receptive fields rectangular? What do the 3 bars side-by-side represent?

@changkaizhao 6 жыл бұрын

circle receptive fields arranged one by one have a similar result to bar-like receptive fields! the middle bar represents the ON area of the receptive field and pink bars represent OFF area of the receptive field.

@halahobishi3899 Жыл бұрын

Nancy you are cool

@JohnSmith-gp9ut 4 жыл бұрын

Does it matter the colour of the oriented bar / color of background? Can't find this info anywhere.

@fenderrhodes9647 4 жыл бұрын

No, color is not computed in v1 so it only cares about the orientation of a line. The color would matter in v4 however, as this is where color is constructed.