excitation

noun

1. 1

   something that agitates and arouses

   he looked forward to the excitements of the day

2. 2

   the neural or electrical arousal of an organ or muscle or gland

3. 3

   the state of being emotionally aroused and worked up

   his face was flushed with excitement and his hands trembled

   he tried to calm those who were in a state of extreme inflammation