perceptual development Flashcards
sensory capacities
vision and hearing
hearing
ways we translate and interpret sound
3 parts of the ear
outer - pinna - collect info in a wave format through the ear canal
middle - ear drum/tympanic membrane - translated into vibration - into the 3 tiny bones with stapes being the smallest
inner ear - vestibular system- ability to balance - cochlear structure through diff hair like receptors into nerve impulse
hair cells of the inner ear
auditory nerve - receive vibration then nervous impulse then auditory nerve then interpreted by the brain
why do infants organize sounds
identify location
recognize whos saying what -
if the hearing of an infant is delayed
delayed development?
eyeball development is
delayed
iris 4
coloured part of the eye
pigments are from genetics
muscles to control to opening of the pupil
divides the front and back chamber
pupil 3
how much light comes in and gets reflected - reflectively opens and closes
external forms the front chamber
2 physical protections of the eye
eyelashes and eyelids
3 types of tears
basal - natural - dry or dirty we open and close eyelids to clean
reflex - large foreign objects that we try to wash out - a lot
psychic - emotions and crying - psych stress - more voluntary
internal structures of the eye 5
Normal macula focea centralis optic nerve retinal arteries and veins rods and cones
normal macula
area on retina with large concentration with retinal structures - preferred area of visual concentration 0 large range of peripheral vision
focea centralis
in macula with highest concentration of cones
optic nerve
blind spot as there is no retinal lining so cant interpret light - doesnt uslly get light
retinal arteries and veins -
lines 7/10 area of the back of the eye ball
rods
light and dark
cones
colour - greens reds blues, everything else depends on how they interact with light
everyone is different and there is a gender difference
vision change in the first 6m
20/600 to 20/100
vision at 11m
near adult level, start of gross motor movements
brain development
micro development of brain then macro - lobes, hemisphere, lateralization
motor development needs
vision and hearing for localization of sound and vision
CNS and PNS develop
together when we interact with the world - afferent and efferent
gross motor skills
large muscle activities
sequence is standard - chin up, sit with support, walk with assistance
