Describe the path of an impulse associated with lifting your arm. What part of the brain starts this impulse?

Also, this isn't a completely accurate category, because this is neuroscience, but i picked the closest thing.

Sensory nerves that are part of the peripheral nervous see your arm. Nerve impulses are brought to the brain by interneurons and the brain processes the information and you decide to lift your arm. Nerve impulses from the brain travel again through internuerons and into motor nerves that control the movement of your arm.

Hello there.

What part of the brain starts this impulse?

Nerve impulses