Test 2 Flashcards
What is myelinization?
shears of myelin gradually cover individual axons and electrically insulate them from one another to improve the conductivity of the nerve.
What is synaptic pruning?
Process by which unused or unnecessary neural pathways and connections are eliminated.
What is object permanence?
The understanding that objects continue to exist even when they can’t be seen.
What is temperament?
Inborn predispositions, such as activity level, that form the foundations of personality.
What is meant by subjective self?
An infant’s awareness that she or he is a separate person who endures through time and space and can act on the environment.
What is habituation?
A decline in attention that occurs because a stimulus has become familiar.
What is schematic learning?
Organization of experiences into expectancies, called schemas, which enable infants to distinguish between familiar and unfamiliar stimuli.
What is a holophrase?
Combinations of gestures and single words that convey more meaning than just the word alone.
What are the types of reflexes, examples.
Adaptive reflexes: born with to ensure survival and some persist throughout life.
Primitive reflexes: reflexes controlled by primitive parts of the brain that disappear in the first year of life
Describe the sensorimotor stage of cognitive development.
Stage in which infant use information from their senses and motor actions to learn about the world. Acquire concepts of object permanence and deferred imitation
Provide 3 examples of how adaptive reflexes help humans survive.
- sucking on objects put in mouth (infancy and childhood)
- withdrawal from painful stimuli (lifespan)
- pupil adjustment to brightness (lifespan)
Describe a newborn’s visual acuity.
20/200 or 20/400 (can see objects at 20ft that normal adults see at 200-400ft). Improves rapidly over the first year.
Describe a newborn’s sense of taste.
They respond differentially to all 4 basic flavors.
Describe a newborn’s sense of smell.
Great sense of smell, can distinguish between different personal body odours.
Describe a newborn’s sensitivity to temperature and physical touch.
Best developed sense, respond to physical touch to mouth, face, hands, feet, abdomen
Respond to temperature by getting active when cold