[Solved] What features of the telescopic view of the Andromeda Galaxy, M-31, are also visible to thenaked eye for our similar Galaxy? Electroencephalography: A method of recording electrical activity of the brain through electrodes placed on the scalp. Reticular Formation: A network of neurons located in the brainstem that plays a key role in controlling arousal, wakefulness, and focusing attention. Sleep: A state of rest characterized by altered consciousness, reduced activity, and a decreased response to external stimuli. Arousal: A physiological and psychological state of being awake or reactive to stimuli, often associated with increased heart rate, alertness, and energy.