GenPsychSensationPart1

GenPsychSensationPart1 - Lecture Outline Sensation versus...

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Lecture Outline Sensation versus Perception. Visual Receptors and Visual Sensation. Overview of the other senses. Sensation vs. Perception Sensation: The conversion of physical energy from the environment (e.g., light, sound) into a pattern of neural signals. Sensation occurs in the peripheral nervous system and spinal cord. Perception: The organization and interpretation of the neural signals sent from the sensory organs. Perception occurs in the brain. The Sensory Systems Vision. Hearing. Olfaction (Smell). Skin Senses. Touch (Pressure). Light. Deep. Temperature. Pain Gustation (Taste). Proprioception. Vestibular – orientation in space of the head. Kinesthetic – relationship of body parts to each other.
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Vision Vision (like all senses) is functional. Allows for detection of movement. Predator or prey? Allows for detection of color. Ripe or spoiled? Allows for detection at a distance. Light travels rapidly in straight lines A very large portion of the human cortex is devoted to processing vision. Electromagnetic Spectrum See figure in textbook. Details of the Human Eye See figure in textbook. Details of the Retina Photoreceptors Light Impulses produced by light
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Conversion of Light to Neural Signals Light travels through the retina to impinge on photoreceptors at the back of the eye. Light bleaches a pigment contained within the photoreceptors which leads to a
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GenPsychSensationPart1 - Lecture Outline Sensation versus...

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