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10_Up_to_consciousness - Terminology Chapter 10 Up to...

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1 Chapter 10: Up to consciousness Sensation (gewaarwording) Perception (waarneming, ervaring) Attention Intention Consciousness Terminology Sensation ~ gewaarwording Perception ~ waarneming, ervaring Arousal, wakefullness ~ wakkerheid: non-specific activation of the cortex in relation to sleep-wake state Alertness ~ alertheid, opmerkzaamheid: includes some cognitive processing. Vigilance ~ vigilantie, waakzaamheid: sustained (tonic) attention. Awareness ~ besef Sensation, perception Sensation detection of physical energy from objects transmitted to the brain Perception interpretation of that physical energy, into meaningful sensory experiences (making sense) Perception, illusions and hallucinations Illusion An illusion is a distortion of what is sensed. Hallucination The perception of something that can not be sensed externally. In hallucinations, there are correlations between particular kinds of hallucination (e.g. visual) and activity in the appropriate (visual) centres that normally subserve real phenomena of the same kind. The Müller-Lyer illusion
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2 The cube of Necker Perception and illusions More alternations after stimulanting drugs (cafeine, speed…) Watching actively: Extravert persons alternate more (feel rapidly bored) Looking passively: Introvert persons alternate more (more brain activity at rest) Perception and illusions The cube of Necker Perception and illusions Top-down (from brain expectation to periphery) disturbs buttom-up Perception and illusions
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