An Evoked Response (also known as an Evoked Potential) is a change in the EEG signal that is specifically caused by an external stimulus, such as a visual, auditory, or somatosensory input.
These responses are time-locked to the stimuli and are useful in clinical diagnosis to assess sensory pathway function.
The word "evoked" indicates that the response is triggered or induced by a specific event or stimulus, and this is a standard term in neurophysiological monitoring.
The other options such as "provoked response," "ckoored response" (which appears to be a typo), and "impulse response" are either incorrect or not used in this context.