Question: how dose are bran control are musicals though are nerves? (:

Thomas Biggans answered on 27 Jun 2016:

So your brain is linked to your muscles by nerves which are like electrical wires. It starts off as a large nerve coming down the back of your neck and then splits off into smaller nerves to go to the different parts of your body ie one for the left arm one for the right leg etc. The nerves then split again and again until it connects with the muscle.

Now if the muscle doesn’t need to make small movements like your quads in your leg then it doesn’t need as many nerves because a big block of the muscle is kept together and connected to one nerve. You can try it out, sitting in your seat with your feet flat on the ground, try and lift one knee up by as little as possible. Smaller movements need more control so there are more nerves controlling more smaller blocks of muscle like in your eye.

So when you decided to move a muscle the brain sends a electrical signal down the nerve to the muscle and when the signal gets there the muscle moves. Now imagine how many muscles are used when you are walking, your brain figures out what muscles it needs to control and how to move them relative to on another, your brain isn’t born with this knowledge it has to learn which muscles and at which times, this goes for when you learn to walk and when you learn to ride a bike.