Another cue associated with turn-taking is that of timing.
Relapse can be triggered by stress, cues associated with past drug use, or re-exposure to the substance.
Other researchers, working with animals, have also found that the amygdala is important in responding to cues associated with rewards like cocaine and food.
Functional-imaging studies in humans has shown that environmental cues associated with addictive drugs releases dopamine in the nucleus accumbens.
Infants are responsive to the olfactory cues associated with maternal breast odors.
When this degradation is asymmetric (worse in one ear than the other) the binaural cues associated with sound localization can also be degraded.
In the standard conditioned place preference procedure, when the unconditioned stimulus is rewarding, rodents will more likely approach the compartment that contains cues associated with it.
Alternatively, when the unconditioned stimulus is aversive, rodents will more likely escape and avoid the compartment that contains cues associated with it.
Initially this caused the birds to inaccurately judge sound source location, since the cues normally associated with each location in space had been changed.
CMC may lack many of the auditory and visual cues normally associated with the emotional aspects of interactions.