| Anton's syndrome | A neurological condition in which a cortically blind person denies his or her blindness.
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| dualism | The philosophical view that mental events need not be associated with neural events. See materialism.
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| evoked potential (EP) | The electrical response in a collection of neurons that is provoked by a stimulus.
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| far senses (distance senses) | Senses, such as vision, that enable an organism to perceive objects or events some distance away. See near senses.
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| illusions | Perceptual errors.
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| lesion | Damage to a restricted region of the body, particularly some portion of the nervous system.
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| materialism | The philosophical view that ascribes all mental experiences to neural events. See dualism.
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| naive realism | The philosophical view that perception accurately portrays all objects and events in the world.
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| near senses | Senses, such as touch, that require close proximity between the perceiver and the object or event to be perceived. See far senses.
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| perception | The acquisition and processing of sensory information in order to see, hear, taste, smell, or feel objects in the world; also guides an organism's actions with respect to those objects. Perception may involve conscious awareness of objects and events; this awareness is termed a percept.
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| PET (positron-emission tomography) scan | scan An image of the brain, or other structure, that is created by means of positron emission tomography.
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| psychophysics | The branch of perception that is concerned with establishing quantitative relations between physical stimulation and perceptual events.
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| sensory transduction | The process occurring within sensory receptors by which physical energy (stimulus) is converted into neural signals.
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| solipsism | The belief that no one exists other than oneself.
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| specific nerve energies | The doctrine that the qualitative nature of a sensation depends on which particular nerve fibers are stimulated.
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| stimulus | The pattern of physical energy set up by an object or event in the environment.
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| subjective contours | Illusory contours or surfaces, especially like those devised by Kanizsa.
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| subjective idealism | The view that the physical world is entirely the product of the mind.
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2002 McGraw-Hill Higher Education