7820535
Description
Mind Map by Kristen Thorpe, updated more than 1 year ago
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Created by Kristen Thorpe
almost 8 years ago
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Sensation and Perception
- Sensation- Stimulation of
sense organs
- Absorption of energy
(light/sound waves), by
sensory organs such as
our eyes and ears
- Absorption of energy
(light/sound waves), by
sensory organs such as
our eyes and ears
- Perception- selection,
organization, and
interpretation of sensory input
- Organizing and translating sensory
input into something meaningful
- Ventral stream in the brain
associated with our
perception of the world
- Dorsal stream in the brain
associated with action and
control of goal directed
movements
- Ventral stream in the brain
associated with our
perception of the world
- Organizing and translating sensory
input into something meaningful
- Visual System
- In order to see, we must
have light. Light waves
vary in amplitude and
wavelength.
- Amplitude- affects
perception of brightness
- Wavelength- affects
perception of colour
- Amplitude- affects
perception of brightness
- The Lens of the eye
- Transparent structure
that focuses light rays
onto the retina
- The retina absorbs light,
processes images, and
sends visual information
to the brain
- Rods
- Play a key role in night
vision and peripheral
vision
- Play a key role in night
vision and peripheral
vision
- Cones
- Play a key role in
daylight vision and
colour vision
- Fovea is a tiny spot in the
retina that contains only
cones, and has a high acuity
- Play a key role in
daylight vision and
colour vision
- Rods
- The retina absorbs light,
processes images, and
sends visual information
to the brain
- Transparent structure
that focuses light rays
onto the retina
- Pupil of the eye
- The opening in the
iris that regulates
amount of light
passing into the eye
- The opening in the
iris that regulates
amount of light
passing into the eye
- Optic Chiasm- the point at
which the optic nerves
from each eye cross over
and project to the
opposite side of the brain
- The main pathway
projects to the
thalamus
- The main pathway
projects to the
thalamus
- Colour
- Perceived colours is the
function of dominant
wavelengths
- Subtractive colour
- Removing some wavelengths
of light, leaving less light than
was originally there
- Removing some wavelengths
of light, leaving less light than
was originally there
- Additive colour
- Putting more light in the
mixture than exists in any
one light by itself
- Putting more light in the
mixture than exists in any
one light by itself
- Colour Theories
- Trichromatic Theory
- The human eye has
three types of receptors
with differing
sensitivities to different
light wavelengths
- The human eye has
three types of receptors
with differing
sensitivities to different
light wavelengths
- Opponent Process Theory
- Colour perception depends on
receptors that make antagonistic
responses to three pairs of colours
- Colour perception depends on
receptors that make antagonistic
responses to three pairs of colours
- Reconciling Theory
- Realizing that the Trichromatic and
opponent process theory are
needed to explain colour vision
- Realizing that the Trichromatic and
opponent process theory are
needed to explain colour vision
- Trichromatic Theory
- Subtractive colour
- Perceived colours is the
function of dominant
wavelengths
- In order to see, we must
have light. Light waves
vary in amplitude and
wavelength.
- Auditory System
- Sound waves are vibrations of
molecules, moving at a
fraction of the speed of light
- Characterized by their amplitude,
wavelength, and purity. Affect
perceived qualities of loudness,
pitch, and timbre.
- Characterized by their amplitude,
wavelength, and purity. Affect
perceived qualities of loudness,
pitch, and timbre.
- The ear is divided into three
sections: the outer ear, the
middle ear, and inner ear
- External ear depends on vibration of air
molecules, middle ear depends on
vibrations of movable bones, and inner
ear depends on waves in a fluid.
- Inner ear consists of the cochlea- a
fluid filled, coiled tunnel that
contains hearing receptors.
- Basilar membrane runs along
the spiralled cochlea and
holds auditory receptors (hair cells).
- Sound signals routed to the
thalamus, then auditory cortex
in the temporal lobes
- Sound signals routed to the
thalamus, then auditory cortex
in the temporal lobes
- Basilar membrane runs along
the spiralled cochlea and
holds auditory receptors (hair cells).
- Inner ear consists of the cochlea- a
fluid filled, coiled tunnel that
contains hearing receptors.
- External ear depends on vibration of air
molecules, middle ear depends on
vibrations of movable bones, and inner
ear depends on waves in a fluid.
- Theories of Hearing
- Place Theory
- Perception of pitch
corresponds to the rate or
frequency, at which the
basilar membrane
vibrates
- Perception of pitch
corresponds to the rate or
frequency, at which the
basilar membrane
vibrates
- Frequency Theory
- Perception of pitch corresponds to
rate or frequency at which the
basilar membrane vibrates
- Perception of pitch corresponds to
rate or frequency at which the
basilar membrane vibrates
- Both theories are valid,
but slightly flawed
- Place theory was on the mark
except that hair cells vibrate
together as suggested by
frequency theory
- Place theory was on the mark
except that hair cells vibrate
together as suggested by
frequency theory
- Place Theory
- Sound waves are vibrations of
molecules, moving at a
fraction of the speed of light
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