Ch 5.3-5.4 Flashcards
developenta psychology
study of how humans develop physically, cognitively and socially thruout their lifetime
at conception
F and M gametes fuse to form a zygote- a single cells with the entire genetic complement ( 46 chromosomes) necessary for developing into human being
placenta purpose
transfers nutrients and oxy to developing fetus and transports waste and carbon dioxide away from fetus, acts as a barrier, protecting the fetus from most harmful substances but some substances can still cross the barrier inclding alcohol which has shown to have negative impact on neuro dev.t
reflexes
automatic survivors
useful for survival
primitive because the originate in CNS and are exhibited by all normal infants
7 reflexes exhibited by all normal infants
moro ( startle) rooting sucking babinski tonic neck palmar grasp walking/ stepping
moro reflex
in response to loud sound or sudden movement, infant will startle; baby throws back its head and extends its arms and legs , cries, then pulls the arms and legs back in
moro duration and start
present at birth
lasts 6 months
rooting
response to touching or stroking one of baby cheeks, baby will turn its head in direction of stroke and open its mouth to root for a nipple
sucking
linked with rooting reflex
in response to anything touching roof of babyès mouth, it will begin to suck
babinski
in response to sole of foot being stroked , baby big toe moves upward or toward the top of the foot and other toes fan out
tonic neck
in response to head being turned to one side, bay will stretch out arm on same side and opposide arm bends up at the elbow
reflex lasts 6-7 months
palmar grasp
in response to stroking the baby palm, baby hand will grasp, reflex lasts for a few months
walking
in response to soles of baby feet touching flat surface, attempt to walk by placing one foot in front of the other
reflex dissapears at around 6 weeks and reappears at around 8-12 months when baby learns to walk
baby preferences for sounds
that facilitate social responsiveness
turn heads to human voices
can distinguish motherès voice and smell
baby pref for sights
that facilitate social responsiveness
gave longer at images that resemble faces
reflexive movements
primitive, involuntary movements that serve to prime neuromuscular system and form the basis for the more sophisticated mvmt to come
ex of reflex mv
palmar grasp reflex primes the nervous system for more controlled grasping learned at later stages
reflex duration
reflexes and learnig to inhibit reflexes occurs during the 1st year of a childès life and overlaps with the stage in which rudimentary movements are learned
rudimentary mvmts
1st voluntary mvmt performed by a child
form foundation on which fund l mvmts are built and is primarily dictated by genetics ( more less pre programmed ) mvmts
rud mv ex
includes rolling, sitting, crawling, standing and walking
rud mv duration
occur in predictable stages from birth to age 2
fund .l mvmt
child is learning to manipulate his or her body thru actions
highly influenced by environment more than rud mv
children are typically in school at this stage, physical activity and games are necessary for proper motor dev.t
mvmts initially start out uncoord d and poorly controlled, but as the child advances in age, mvmts become more refined, coordinated, efficient
fund mvmt duration
from age 2 to 7
fund mvmt ex
actions such as running jumping catching throwing