Please enable JavaScript.
Coggle requires JavaScript to display documents.
Sensation & Perception (Part 1) - Coggle Diagram
Sensation & Perception (Part 1)
Definitions
Sensation ~ Process of internal patterns of nerve impulses created via receptions, to represent brain stimulus
Senses all operate the same way but extracts different information and communites to their specialized region in the brain for processing
Perception ~ Process based on our human senses to create meaningful pattern
Our brain perceives the world via neural messages provided by our senses.
Transduction ~ conversion of physical energy to form neural messages
Sensory Receptors ~ Specialized neurons activated by stimulation and coverts stimuli into electrochemical signals
Sensory Pathways ~ Neuron bundles that carries information from sense organs to the brain (external stimuli into neuro information)
Thresholds
Absolute Threshold ~ Amount of stimulation required for detection
Difference Threshold ~ Minimal amount for stimulus to be changes and have detectable differences
Weber's law ~ Size of JND is proportional to intensity of stimulus, where the JND and Stimulus intensity is positively correlated
Signal Dectection Theory
(2) Neural Activity
(3) Comparison with personal standard
(1) Stimulus Event
(4) Action (or no action)
The Light stimulus
Anatomy of the eye
Retina ~ light-sensitive later at the back of the eyeball
Rods ~ sensitive to dim light but not colors
Cones ~ Sensitive to colors but not dim lights
Photoreceptors ~ light-sensitive cells that converts light energy to neural impulses
Fovea ~ Area with the sharpest vision
Optic Nerve ~ Bundle of neurons that is responsible for visual information communication from retina to brain
Blind Spot ~ Point where the optic nerve exists the eye where there are no photoreceptors
How Visual System creates colors
Electromagnetic Spectrum ~ entire range of electromagnetic energy
Visible spectrum ~ Portion of the electromagnetic spectrum visible to human eye
Opponent-process theory~ based on bipolar cells, complementary pairs, and explains afterimages
Afterimages ~ lingers after the image is removed
Trichromatic Theory ~ based on red, green, and blue cone receptirs and explains initial stages of color vision
Color Blindness ~ Vision disorders that prevents individual from certain color discrimination
Processing Visual Sensation ~ Visual cortex; occipital cortex