Development Flashcards
Developmental Psychology
Universal aspects of lifespan development from conception through death; Identifies cultural variations ex) Death and birthing processes & spirits Explores physical (carrying babies on back), cognitive (how children come to see the world), social and emotional development (developing friendships, self esteem)
Germinal Phase
conception-2 weeks
Zygote
fertilized egg; divides and implants itself in the wall of the uterus
Placenta
structure that allows oxygen and nutrients to pass into fetus from mother’s bloodstream; allows waste to pass out
Embryonic stage
2-8 weeks Head, face and neck develop Buds for limbs form and grow Major organs/digestive system differentiating Heartbeat begins
Fetal Stage
8th week-birth
3rd month
digestive organs begin to function
buds for teeth form
sex organs develop rapidly
arms/fingers move
4th month
face looks human
lower body outgrows head
bones are defined
5th month
fingernails and toenails appear
Lanugo
fine, wooly hair over body
Vernix
waxy coating collects
6th month
eyebrows/lashes well defined
eyes completely formed
7th month
fetus capable of life outside uterus, age of viability has changed and now considered to be 24 (used to be 27-28)
8th/9th month
fat is deposited for later use
fingernails beyond fingertips
lanugo is shed
myelination of brain takes place in the fetal stage
chief organs increase functioning
vernix covers body
Cephalocaudal
“top to bottom” motor skills emerge from the head to feet; gain control of head first
“Cep->cap->head”
Proximodistal
“inside-to-outside rule” motor skills emerge in a sequence of center moving outward; ex) buds->arms->finger movement
Teratogens
: harmful toxins that affect development resulting defect, damage or anomaly
important concepts with teratogens
Dose – length of use of antibiotic
Genetics/Heredity: stability; how a particular substance affects you, immune system
Interaction with environmental influences: stress, nutrition, lack of medical care
Age of organism at exposure
Thalidomide
helped identify how certain drugs could alter development; babies born with malformed limbs
Stress
prolonged stress linked with prematurity and low birth weight; can change cortisol levels & associated with low birth weight or premature babies
Smoking
nicotine is mild stimulant; increases fetal activity; low birth weight, perceptual and attentional problems, increased Sudden Infant Death Syndrome; (primary/secondary/tertiary smoke exposure)
Marijuana
low birth weight, disturbed sleep in newborns, reduced attention to environment
Heroin
premature birth weight, tremulous behavior, poor sucking and feeding reflexes, risk of SIDS
Cocaine
premature size/weight, tremulous, high pitched crying, respiratory & regurgitation problems, rigidity, withdrawal symptoms, deformities
Comorbidity
abuse of multiple substances likely
alcohol
Leading teratogen in the United States causing mental retardation – We do not know safe levels, so do not drink
Physical Symptoms: growth retardation (smaller), head and facial abnormalities, microcephaly (significantly smaller head), skeletal, brain and heart damage
Behavioral Symptoms: poor impulse control, poor attention, hyperactivity and cognitive deficits
Fetal Alcohol Effects: some symptoms of FAS, but less physical symptoms (ARND)
Vision of infants
Poor fixation ability
limited ability to discriminate color
estimated visual acuity of between 20/200 and 20/400
preference for human faces
hearing of infants
fetus can hear sounds around 6 months in utero
Recognize mother’s voice
taste and smell of infants
both present at birth, preference for sweet
touch of infants
heat, cold, pressure and pain all present at birth
reflexes
inborn, automatic responses to a particular form of stimulation.
rooting reflex
survival value, stroke cheek and baby will turn head toward the stimulation
stepping reflex
basis for complex motor skills, with bare feet touching floor infant will mimic a stepping response (disappears around 2 months)
Sucking reflex
place a finger in mouth and baby will suck; permits feeding
Eyeblink reflex
shine a bright light or clap, they will close eyelids. Protects from strong stimulation