Lecture 5

Lecture 5 - Coding--Pattern of neural activity that...

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SENSATION AND PERCEPTION I. Sensation = The process by which an organism responds to a stimulus Energy contains information A. Types of Sensation 1. Vision 2. Hearing 3. Touch 4. Taste 5. Smell--Olfactory 6. Kinesthesis--System for sensing the position and movement of individual body parts; a. Vestibular sense--Sense of body movement and position, including balance B. Five steps of Sensation Energy contains information about the world 1. Accessory structures modify the stimulus Example: lens of the eye, outer part of ear 2. Transduction --Converts incoming energy into neural activity Receptors --energy membrane potential neurotransmitters Sensory adaptation --Responsiveness to an unchanging stimulus decreases over time. 3. Sensory nerve transfers the coded activity o the CNS
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Unformatted text preview: Coding--Pattern of neural activity that identifies the physical properties 4. Thalamus processes and relays neural response 5. Cortex receives input and produces the sensation II. Perception The process of sorting, interpreting, analyzing, and integrating stimuli from our sensory organs A. Organize and compare If theres a match, then theres recognition Perceptual category 1. How? Top-down processing--Top = Knowledge and expectations guide recogntion Versus 2. Bottom-up processing--recognition stem from sensory receptors and is then assembled into a whole B. Bottom-up processing--Analysis of a stimulus into its basic features C. Top-down processing Higher level cognitive functions--Expectations and motivations Bias Perceptual set = Readiness to perceive a stimulus in a certain way...
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Lecture 5 - Coding--Pattern of neural activity that...

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