Perception Readings Flashcards
sensation and perception are…
active processes
transduction
sensation requires converting energy in the world into internal signals that are psychologically meaningful.
sensory receptors
transform energy in the environment into neural impulses that can be interpreted by the brain.
example of SDT
a neurologist who recently missed a tumour on a scan is more likely to have a low threshold for reporting seeing a stimuli etc.
order of laws for processing
weber’s law, fechner’s law, stevens’ power law.
light is
electromagnetic radiation that travels in straight lines.
first step of seeing
the cornea, pupil and lens focus light on the retina.
second step of seeing
the retina transduces this visual image into neural impulses that are relayed to and interpreted by the brain.
aqueous humour
supplies oxygen and other nutrients to the cornea and lens.
lens
an elastic structure that is involved in focusing the eyes. the lens flattens for distant objects and becomes rounded for closer objects, this is called accommodation.
bipolar cells
combine information from many receptors and produce graded potentials on ganglion cells.
optic nerve
carries visual information to the brain
blind spot
also called the optic disk. is the point on the retina where the optic nerve leaves the eye and where there are no photo receptors.
bipolar cells and cones
a single cone may connect with a single bipolar cell.
bipolar cells and rods
several rods may provide input to a single bipolar cell.