a nerve 'impulse' [=a wave of electrical energy that is carried through the nerves to the brain]
Shopping with a credit card can lead to 'impulse buying'.
He had to resist the 'impulse' [='urge'] 'to shout'.
(..) - I need to stay focus. - Sure. Speed it up. How did you manage to access all these information? Electrical impulses... Every cell knows and talks to every other cell. They exchange a thousand bits of information between them per second. Cells group together, forming a giant web of communication (..)2014 Lucy