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senses

advanced terms related to human senses

TermDefinition
weber's law one of the basics laws of psychophysics that just a noticeable difference is in constant proportion to the intensity of an intial stimulus
difference threshold the smallest level of stimulation required to sense that a change in stimulation has occured
just noticeable difference the mininum stimulation required to detect the difference between two stimuli
retina the part of the eye that converts the electromagentic enegry of light into useful information for the brain.
rods thin cylindrical receptor cells in the retina that are highly senstive to light
cones cone shaped light senstive receptor cells in the retina are responsible for sharp focus and color perception particulary in bright light
optic nerve a bundle of ganglion axons that carry visual information
feature detection the activation of neurons in the cortex by visual stimuli of specific shapes or pattern
trichromatic theory of color vision the theory that there are three kinds of cones in the retina each of which responds primilary to a specific range of wavelengths
opponet process theory of color vision the theory that receptor cells are linked in pairs working in oppostion to each other
eardrum the part of the ear that vibrates when sound waves hit it
sound the movement of air molecules brought by the vibration of an object
cochlea a coiled tube in the ear filled with fluid that vibrates in response to sound
basilar membrance a vibrating structure that runs through the center of the cochlea dividing into an upper and a lower chamber and containig sense receptors for sound
hair cells tiny cells covering the basilar membrance that when bent by vibrations entering the chohela transmit neural messages to the brain
place theory of hearing the theory that different areas of the basilar membrane respond to different frequiences
frequency theory of hearing the theory that the entire basilar membrance acts like a microphone vibrating as a whole in response to a sound
semicircular canals three tubelike structures of the inner ear containing fluid that sloshes through them when the head moves signaling rotional or angular movements to the ar
otoliths tiny morion senstive crystals within the semicurlar canals that sense body accerlation
skin senses the senses that include touch pressure temperature and pain
gate control theory of pain the theroy that patircular nerve receptors lead to specific areas of the brain related to the brain
gesalt laws of organization a series of principles that describe how we organize bits and pieces of information into meaningful pieces
feature analysis a theory of perception according to which we perceive a shape pattern object or scene by reacting first to the individual elements that make it up
top down processing perception that is guided by higher level knowledge experience expecations and motivations
bottom up processing perecption that constists of recoginizg and processing information about the individual componets of the stimuli
visual illusions physical stimuli that consistenly produce errors in perception
What is a phisical property? A characteristic of a substance that can chnage without a new substance being formed.
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