Thanks to the perceptual changes wrought by Cubism, Surrealism and the triumph of abstraction in midcentury, disinterested representation has become virtually impossible.

The respiratory alkalosis leads to changes in the way the nervous system fires and leads to the paresthesia, dizziness, and perceptual changes that often accompany this condition.

She established the study of perceptual learning as an inquiry into the behavior and mechanism of perceptual change.

The fascination of multistable perception probably comes from the active nature of endogenous perceptual changes or from the dissociation of dynamic perception from constant sensory stimulation.

This may therefore indicate that highly suggestible hypnotic subjects are simply activating to a greater extent the areas of the brain used in imagination, without real perceptual changes.

There are a number of perceptual changes that can accompany HPPD.

This category includes all of the calmative, sleep-inducing, anxiety-reducing, anesthetizing substances, which sometimes induce perceptual changes, such as dream images, and also often evoke feelings of euphoria.

Some users have reported decreased anxiety, mild euphoria, perceptual changes, visual distortions, and hallucinations.

The nature of world undergoes a perceptual change; actually it is the perceptions that change, not the world.

However, other evidence that shows a tight coupling of perceptual and physiological changes suggests activation in this area does underpin object recognition.