An act of irritation or stimulation or of responding to a stimulus; the addition of energy, as the excitation of a molecule by absorption of photons.
In physiology, the process whereby activity is elicited in a nerve.
The state of being mentally or physically aroused.
The triggering of a conducted impulse in the membrane of a muscle cell or nerve fiber. During excitation a polarized membrane becomes momentarily depolarized and an action potential is set up.
When used in neurophysiology, the term means the triggering of a conducted electrical impulse in the membrane of a muscle cell or the nerve fibre controlling it.
The infusion of energy into a system causes a transition from its initial ground state to a heightened excited state. Nuclei, atoms, or molecules can undergo excitation through the absorption of photons or via inelastic collisions with other particles.