Chapter 3: Perception Flashcards
Which sense has the most dedicated area in the brain?
vision has more cortical area devoted to its perception
Light is based on an _____ continuum
EMR Spectrum
light vision deices make use of ____ light waves to detect heat
infrared
the image appears _______ when it gets projected onto the ____
appears upside down when it gets projected back on the retina
the portion of the retina dedicated to color perception is called the ___
fovea
what photoreceptor cells allow the fovea to detect color?
cones
center of visual field
fovea.
____ acts as a filter for light coming in
cornea
pupil
regulates how muhc light gets passed into the eye
iris
color bant, contains muscles to constrict and dilate the pupil
the ___ bends light to focus ir on the back of the eye
the lens
when elderly people cannot focus on objects, its most likely because:
the lens gets less flexible and cannot focus on objects.
the ___ acts as a projective screen, and is comprised primarily of _____ cells.
the RETINA acts as a projective screen, and is comprised primarily of PHOTORECEPTOR cells.
photoreceptor cells respond to ______, and turn it into a ____-signal
respond to light energy, and turn it into an electrical (NEURAL) signal
rods and cones convert the light stimulus into a neural signal, which is conveyed to the ____, which leave the eye through the ______ to the back of the brain.
rods and cones convert the light stimulus into a neural signal, which is conveyed to the GANGLION CELLS, which leave the eye through the OPTIC NERVE to the back of the brain.
the optic nerve are made of axons of _____.
ganglion cells.
what is the blind spot of the eye
the optic nerve
T/F: the optic nerve contains rods and cones
false. Only ganglion cells, which get their inormation from the rods and cones.
General route of light stimulus
cone/rods —> bipolar cells –> ganglion cells —> optic nerve
Myopia
nearsightedness.
Hyperopia
farsightedness/
as older people lose the flexibility of their lens, they generally suffer from:
hyperopia.
what about the tissue makes the retina so special compared to other eye structures?
it is actually composed of a thin layer of NEURAL TISSUE (ganglion and bipolar cells) lining the back of the eye
the ____ contains a large quantity of cones but has very little rods
the fovea