GPSYCH Chp 6 Study Guide.docx

GPSYCH Chp 6 Study Guide.docx - Chapter 6 1 Explain the...

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Chapter 6: 1. Explain the difference between sensation and perception Sensation : the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment o The brain receives input from the sensory organs o Sight, taste, smell, hearing, touch, pain Perception : the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events o The brain makes sense out of the input from sensory organs o Kinesthesis (“movement feeling”): sensing the movement and position of individual body parts relative to each other . o Vestibular Sense : the ability to sense the position of the head and body relative to gravity , including the sense of balance. 2. Explain the three basic processes of sensation: a) Receive stimulation, often using specialized receptor cells o Information is received through the receptor cells of the senses b) Transduce stimulation to neural impulses o Stimulation of the senses is transformed into neural impulses o Transduction : conversion o one form of energy into another; in sensation the transforming of stimulus energies, such as sights, sounds, and smells, into neural impulses our brain can interpret c) Deliver neural information to the brain o Neural impulses are transmitted to the brain 3.Summarize the basic operations of the senses – make sure to read Table 6.3 The Retina: the light sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information •Rods =black and white and gray, good for peripheral vision and twilight vision •Cones =color The rods and cones send messages to ganglion and bipolar cells and on to the optic nerve. Once neural signals enter the optic nerve, they are sent through the thalamus to the visual cortex.
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Visual Information Processing: Turning Neural Signal into Images •The images we “see” are not made of light; they are made of neural signals which can be produced even by pressure on the eyeball. Instructor: the first bullet point can be demonstrated by the activity suggested on page 230 of the text (closing eyes, turning eyes to the left, pressing on the right corner of they eyelid). It can also be demonstrated by mentioning, “Maybe this is why people are said to “see stars” when they get punched hard in the head.”
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