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Psy Midterm 2 Study Guides

Psy Midterm 2 Study Guides - Topic 5 Sensation Perception...

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Topic 5: Sensation & Perception Definitions: - Blind Spot: An area in your eye below the Fovea that does not have cells to detect light, leaving a blind spot or an area that is not perceived. This “blind spot” is then filled in with your brain. - Mystery Spot Illusion: An attraction that uses forced perspectives to create an illusion. - Hair Cells: Located in the cochlea of the brain. They are the sensory receptors for our auditory system by transforming the sound vibrations to electrical signal sent to the brain. - Moon Illusion: The illusion that the moon is larger when it is closer to the horizon than when it is higher in the sky. When the moon is farther, there are depth cues that make it appear far away, but when it’s closer, there is nothing to compare it to. - Binocular Disparity: The two eyes see different views but the brain puts the images together to create one view and the ability to sense depth which helps with grabbing things etc. - Receptive Fields: Region of visual space to which neurons in the primary visual cortex are sensitive. 1. Vision: Vision is sensed with our eyes. When we see something, we sense light using the cones and rods in the retina of our eyes. The cones (color) and rods(nighttime vision) are the receptors to the light, which then send the upside down image to our thalamus which then leads to the cerebral cortex to be flipped. - Transduction: Light energy is turned into neural impulses - Sensory Neuron: Rods and cones Hearing: Sounds are waves that we hear using our ears. When a sound enters our ears, the vibration goes into the cochlea which holds hair cells. The hair cells convert these sound vibrations into electrical impulses and send them to our auditory nerve to be sent to the brain. - Transduction: Sound pressure to mechanical energy to neural impulses - Sensory Neuron: Hair cells Touch: When we touch things our skin has nerve endings beneath it which sense something we touch and sends a signal to our brain. - Transduction: Pressure is turned into
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- Sensory Neuron: Nerve endings Smell: Smell is a “chemical” sense. Odors are molecules with specific shapes that are unique to each scent. They enter our noses and are bonded to our olfactory bulbs inside and a signal is sent to the brain which helps recognize what odor it is. - Transduction: Odor molecules (chemicals) are recognized by our brain as what we perceive to be smell by the Olfactory nerves. - Sensory Neuron: Olfactory bulbs Taste: Taste is recognized by our tongues which hold taste cells across the top. These taste cells can recognize only 5 tastes: sweet, sour, bitter, salty and unami then send a signal to the brain - Transduction: Chemicals are sensed by taste cells and change into signals by them to determine what taste it is - Sensory Neuron: Taste cells 2. Our eyes are similar to cameras they are used to view images.
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