Test One CH 6 Flashcards
What is Sensation
process by which stimulation leads to processes in the brain
General functions of the sensory system
Detect Enviromental inputs, encode enviromental energy, relay info to brain
Transduction
transfering info about sensory stimulai into action potentials
adaptation
decreased responce to unchanging stimulai, like we forget we are wearing a watch
sensory receptors
specialized cells that detect certain forms of stimulai
Wavelength, Frequency and Amplitude
W - distance between waves peaks
F- how many times in a unit of time
A how high
Can we see all electromagnetic waves?
No only red to violet
Photoreceptiors
On the retna
Rods - light sensitivity
Cones - Wavelength
Trichoromatic Theory
3 types of cones
red blue, and green
Color Blindness
One of the 3 cones are faulty
Opponent-process theory
three pairings of color sensitive visual elements
Red/Green
Blue/Yellow
Black/White
Only one member can be active at a time, the other inhibits. Pairs in the ganglion cells.
Explains after images.
Middle ear
Amplified sound Contains Typanic membrane (eardrum) Ossicles (bones hammer anvil and stirup) Oval window
Place theory
different sounds vibrate at different places along the basilar membrane
Frequency-matching theory
Auditory nerves fire an action potential of the frequency you are hearing.
Conduction Deafness
deafness to the middle ear and amplification
you can use hearing aids
Nerve/ sensorineural deafness
Inner ear, cochlear implant.
somatosensation
sense to the skin.
Bottom up processing
Analyzing info from senses
breaks things into their parts
important in first encounters
Top down processing
Knowlege and expectations based on context and experience
perceptual set
mental predisposition that creates bias, such as priming
