Okay, super. Thank you. Thank you very much. Okay, so before we start going through the

questions, let's start through, if you guys have any questions, please don't be shy. Just

ask any question because this is another topic and no one here will judge you for anything.

So let's be, let's keep this very informal, so you guys can get the most out of this session.

Any question? Okay. All right. So I will start. I will start with the first part, okay? And

then we can go through together, okay? So we looked at the muscle, okay? So how the

muscle produces force and produces tension and then, you know, we can move and grasp things.

And one of the first questions, so I asked, in what energy it supplies to the muscle,

in what biochemical form? This is of course a very specific question, which is related

to the ATP inside the muscle. So the ATP, which is the form, which is the, it's basically

the money the body uses to produce energy and it's in the form of adesine triphosphate.

So every time we want to generate an action, we need the ATP in the muscle and ATP loses

one molecular of phosphate and this molecular of phosphate is used to generate energy. And

this is exactly like, imagine like a cash that you're paid, that the, you know, you pay to

produce energy. And this is the answer. So now maybe some of you can take this question.

So are there different muscle fiber types in the muscle? What about Nico? What do you

think? I think there are these longitudinal muscle

fiber types and the cross one side on the, yeah.

So this is the composition of the muscle. It can be longitudinal or penate. Exactly.

And this is important. And are there also slow and muscle fiber types? Does anyone want

to take this question? Do you think there are?

I think there are because there are different muscle fibers with different threshold.

Yeah. Yeah. Exactly. So it's very important this. So the threshold of the muscle fiber

of the motor neuro determines the property of the muscle. There is a very intrinsic relation.

And so there are. Does anyone can tell me a muscle that is slow and a muscle that is

fast? Feel free to tell. I mean, try to imagine with your background, what do you think? There

is a muscle in the human body that is slower than another. Johanna, do you want to say

something? A fast muscle, maybe the muscle from the eye.

Yeah. They're very reactive, very fast. And the muscle that is low.

Maybe one from the leg. So one, the classic muscle that is from the

leg and is the soleus muscle. And it is always started as the muscle that is the most lowest

one. And it's interesting because if you take like a cadaver and you do a cross section

of the muscle, so you literally slice it, like you slice the muscle and then you look

at the microscope, you see all the muscle fiber. They're all small and they're all the

same. Whereas if you take, for example, the gastrocnemius, which is a very more powerful

muscle, you see muscle fibers smaller and bigger. So there are different muscle that

are slow and fast. So now this is another question. I didn't

give you an answer in my slides, but I would like you to think about this because this

is a very complex question. So when you grasp an object, for example, I have this knife

here very randomly, but I have a knife. So when you grasp, for example, a knife or when

you grasp a glass, let's say a glass is better, it's a better example. So when you grasp a

glass and so you have in the forearm and in the hand, like more than 20 muscles. So if

we should design a robot, okay, with so many effectors, it's very challenging to control

each of them, like computationally challenging. So what do you think? What is the strategy

that the brain uses to control so many muscle without effort? Because I mean, when you grasp

an object, you are actually activating so many muscle, but without effort. So what do

you think? What is the strategy that the central nervous system uses? So maybe Raul, you want

to take this question? So I do not know if this is the answer, but

basically from the papers I read that you provided, basically the central neural system

sends a signal and muscles are then, or motor neurons are then recruited based on their