Create an account
physiological, environmental stimuli that fall into our sensory system i.e.-light in our eyes
psychological, refers to the multiple complex processes that result in the interpretation of those sensations (perceptual processes) and the end result of the process
the perceptual processes (in order)
environmental stimulus, attended stimulus, stimulus on the receptor, transduction, transmission, processing, perception, recognition, knowledge
begins with the information received by the receptors from the external environment
how a person's perception is related to the stimulus in the environment such as the brightness of a lightbulb and how we perceive it
involves the bodies physiological reaction to stimulus such as light and how it effects receptors of our senses
method of adjustment
active participation by the subject, such as using a dial to adjust the intensity until it's visible to them
as the stimulus intensity increases, the perceptual response increases more than the intensity
stimulation from environment causes neurons to fire, cell membrane becomes permeable to sodium and potassium at different times
1/1000th of a second it takes for the neuron to go back to its resting potential after it fires. it can fire between 500-800 times a second
makes the electrical potential of the dendrites of the next neuron more positive so the next neuron is more likely to fire
makes the electrical potential of the dendrites more negative so the neuron is less likely to fire
groups of interconnected neurons, ranging from a few to 100's or 1000's of simple linear circuits
all information about a stimulus or event is carried in all the neurons of a given population
center-surround receptive field
base rate of firing with no light in area, decrease firing rate with light shining on area burst of firing when light is off
arrangement of electromagnetic radiation--including radio waves, visible light from the Sun, gamma rays, X rays, ultraviolet waves, infrared waves, and microwaves--according to their wavelengths
That portion of the electromagnetic spectrum detected as various colors by the human eye, ranging in wavelength from about 380 nm to about 750 nm.
transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract (bend) light to focus a visual image
absorb light rays and transform them into information that can be transmitted by neurons, rods and cones
has two stages, "fast stage"- increase in cone sensitivity (reason we can see after a few minutes in dark and cones are more sensitive)
"slow stage"- due to increase in rod sensitivity, visual system is controlled my whichever receptor is more sensitive first its cones, then rods become more sensitive
process of rejoining opsin and retinal, results in retina becoming dark again, happens quickly in dark
multiple neurons (receptors) synapsing to a single neuron, rods have more convergence on ganglion cells than cones
lateral geniculate nucleus (LGN)
located in the thalamus, regulates the flow of info, organized in layers, primary visual area, located in the straite cortex
selective rearing (methods with cats and what it shows)
raised cats in an environment with either only verticle lines or only horizontal lines, they were placed in a cylinder with only horizontal or only verticle lines everyday for five months and when the cats who were only exposed to horizontal lines saw a vertical line, they couldn't see it
from the straite cortex to the temporal lobe, object identity, also called the ventral pathway
one function is absent while another one is present, completely seperate, not a one way street
mechanism to keep cells alive, includes the nucleus which is responsible for keeping the cell alive and reproduction
layer of protection and nutritive cells around axons, provides nutrients, speed electrical signal prevents electrical currents from getting lost, kinda like insulation
many receptors send information to one cell, as more receptors are stimulated, there is a greater response from that target cell
we have certain neurons for responding to different things such as people and places
out number cones 120 mil-6 mil, located in peripheral retina NOT in the center, respond in faint light so are better used in dark
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together