Term
| How do sensory systems work? |
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Definition
transduction: convert one kind of energy into another( not all energies, only transduce part of their target energy range)
Sensation: process of deterring physical energies w/ sensory organs
Perception: mental process of organizing sensations into meaningful patterns |
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Definition
different thresholds grow with the magnitude of the stimulus
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Term
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Definition
| body in the presence of certain stimuli, body adapts to it |
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Term
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Definition
| part of the electromagnetic spectrum to which the eye responds |
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Definition
distance between peaks
-hue: basic color categories
-saturation: color's purity
-Brightness: height of light waves |
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Definition
color sensitivity
6.5 million in the eye |
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Definition
low intensity of light (black & white)
100 million in the eye |
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Term
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Definition
| sharpness of cisual perception |
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Term
| what part of retina has highest visual acuity? |
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Definition
fovea
located in the middle of the retina |
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Term
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Definition
increased retinal sensitivity to light after entering the dark
30-35 min to adjust completely
eye is 100,000 x's more sensitive to light |
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Definition
vision at edges of visual field; side vision
mostly rods- low resolution, highly sensitive to movement |
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Definition
in retina
color vision theory that states we have three con type
-red
-green
-blue
other colors produced by a ombo of theses
black and white by rods |
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Term
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Definition
in retina/thalamus
colory vision theory based on three opponent "systems"
-red/green
-blue/yellow
black/white
exciting one color in a pair - blocks the excition of the other color in pair |
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Term
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Definition
| retina-> LGN (thalamus) -> striate cortex |
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Term
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Definition
| super colliculus (in tectum) |
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Term
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Definition
| visual stimulation that remains after stimulus is removed |
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Term
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Definition
-intact basic visual processing
-inability to form percepts of visual stimula
-objects not seen as a whole or in a meaningful way
-caused by diffuse posterior lesions |
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Definition
-Ability to perceve object intact
-cannot understand, recognize or assign meaning to objects
-caused by damage to temporal occipital junction and adjacent white matter |
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Term
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Definition
| your take of sensory input making sense of it in your brain |
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Term
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Definition
| nocireceptor nerve ending-> spinal cord-> rostal medulla-> caudal mid brain-> cerebrum |
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Definition
meds
deep breathing
sleep
deal/ignore
relax
change body position
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Term
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Definition
small fibers input pain = gate open
large fivers input pain = gate close |
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Term
| Geniculate Striate pathway |
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Definition
-Lateral Geniculate Nucleus
- top four layers:parvocellular layers
responsive to: color, fine, detail, patterns, slow or stationary objects
-Bottom two layers : Magnocellular layers
responsive to: movement, contrast |
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Term
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Definition
-microelectrodes used to record firing of single neuron
-rate of firing can increase or decrease in response to a stimuli
-Receptive field :portion of the visual field which, when illuminated, causes a neuron to respond
- RF analyses indicates manner in which sensory information is organized
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Term
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Definition
| enables our sensory systems to detect the lines, angles and colors of a painting |
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