c5 psych Flashcards
Developmental Psychology: Universal aspects of lifespan development from conception through death
Explores physical, cognitive, social and emotional development
Looks at elements of continuity and change over time
What is prenatal development
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 (threshold) of viability has changed and now considered to be 23-26 weeks (used to be 27-28)
8th/9th month: fat is deposited for later use
fingernails beyond fingertips
lanugo is shed
vernix covers body
Myelination of brain takes place in the fetal stage
Teratogens
harmful exposure to situations/substances that affect development resulting in defect, damage or anomaly
Important concepts with teratogens:
Dose
Genetics/Heredity
Age of organism at exposure
Interaction with environmental influences: stress, nutrition, lack of medical care
-Increased understanding of the role of prenatal exposure to drugs on the developing child, with Thalidomide, helped identify how certain drugs could alter development
Smoking:
mild stimulant; increases fetal activity; associated with low birth weight, increased rates of SIDS (Sudden Infant Death Syndrome)
Alcohol:
Leading teratogen in the United States causing intellectual disabilities.
Fetal Alcohol Syndrome (FAS):
Physical Symptoms: growth retardation, head and facial abnormalities, microcephaly, skeletal, brain and heart damage
Behavioral Symptoms: Poor impulse control, poor attention, hyperactivity and cognitive deficits.
Paternal age
may be a factor in birth defects and/or certain developmental disabilities
Sensory abilities
Vision:
poor fixation ability
limited ability to discriminate color
estimated visual acuity of between 20/200 and 20/400
preference for human faces
sensory abilities
Hearing: fetus can hear sounds around 6 months in utero
Recognize mother’s voice
Taste and Smell: both present at birth, preference for sweet
Touch: heat, cold, pressure and pain all present at birth
Physical and motor devpt
Cephalocaudal: “top to bottom” motor skills emerge from the head to feet
Proximodistal: “inside-to-outside rule” motor skills emerge in a sequence of center moving outward
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)
Moro reflex: if simulate falling or dropping the head the baby shows a startle or alarm reflex; arches back, extends arms, fingers and legs
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
Babinski Reflex: stroke the heel to see reactions of the toes which flex/fan out; normal in infants, if persists can indicate neurological problems
Babinski reflex
: stroke the heel to see reactions of the toes which flex/fan out; normal in infants, if persists can indicate neurological problems
Eyeblink reflex
: shine a bright light or clap, they will close eyelids. Protects from strong stimulation
Sucking reflex
place a finger in mouth and baby will suck; permits feeding
Moro reflex
if simulate falling or dropping the head the baby shows a startle or alarm reflex; arches back, extends arms, fingers and legs
Stepping reflex
basis for complex motor skills, with bare feet touching floor infant will mimic a stepping response (disappears around 2 months)
Rooting reflex
: survival value, stroke cheek and baby will turn head toward the stimulation
Gross and Fine Motor Development:
Individual differences exist, normative expectations for these skills and abilities often called milestones.
There is some data supporting environmental influences either accelerating or impeding the acquisition of developmental milestones.
Gender Differences:
: boys ahead of girls in force and power; girls ahead in fine motor and gross motor skills which involve good balance
Cognitive Difference:
see some gender effects in verbal and mathematical abilities, as well as visual-spatial ability