impulse
im-pulse
noun
A sudden, strong urge or desire to do something without thinking.
"She bought the new dress on impulse."
noun
A brief, strong surge of electrical current or other energy.
"The nerve transmitted an electrical impulse."
Thesaurus
Synonyms: neural impulse, nerve impulse, nervous impulse, urge, momentum, impulsion, impetus, caprice, whim, pulsation, pulse, pulsing