Dr. Jennifer Groh

Eye movements, top-down control over vision.

Focusing the lens of your eye, right, that's also top-down control.

There are descending connections from the brain to the retina itself that nobody understands clearly.

apologies to the people working on this i really want you to keep working on this but i feel like there isn't a clear theory yet about what exactly these descending connections might be doing from what i know about it they are you know pretty diffuse connections pretty broad branching of of neurons uh throughout the retina or not throughout the whole retina but but

probably not well suited to manipulating fine spatial detail, but could very well be suited to incorporating some kind of circadian influence to the retina itself or something else that you want the same signal to be broadly available throughout the retina.

Yeah.

It is beautiful.

On that parabola, yeah.

Yes.

Right.

I mean, this is one of the problems with hearing aids.

They amplify everything.

It's not replacing what your brain does.

It's not replacing what your ear normally does.

I'm not sure that I can add something that's really specific to that particular circumstance, but to say more generally that, you know, the sounds that we experience in a particular setting are really the combination of all of the reflective surfaces combined.

that are in that setting.

And so like if you have a carpeted room, that's going to absorb sound from on the floor.

And so you're going to it's going to take out one part of what what you would be hearing in a room that is not carpeted.

And the high ceilings, I would imagine that would kind of depends on what the surfaces are on the ceiling.

One thing that'll happen in that kind of setting is that the sounds that go up that way, if it's a hard surface, they'll probably bounce off and come back down, but with a long delay.