Quiz 1 Flashcards
What do the glial cells do
They play an important role in the migration of neurons, provide myeline, remove debris, supply oxygen, and hold neurons in place
Neurogenisis
Creation of new neurons from stem cells
When does neurogenesis take place
Mostly between 3rd and 15th week of prenatal development but occurs to a limited level even into adulthood
Cell Migration
Migration of newly formed neurons from the ventricular or subventricular zone to their final home
When does cell migration take place
About 4 weeks after conception to about 6 months after conception
Synaptogenisis
Creation of connections between neurons
When does Synaptogensis take place
Begins at about 20 weeks after conception and continues into early adulthood
Synaptic Pruning
The loss of synapses due to lack of use or cell death
When does synaptic pruning take place
From about age 2 until adolescence
When does Myelination take place
From about 5 months postconception into adulthood
Myelination
The formation of a fatty sheath on neuronal axons to facilitation conduction of electrical signals
Experience-expectant
The brain adapts to the presence or absence of an experience that is typical of human experience
occurs during criticial period in development and is typical of almost everyone
Experience-dependent plasticity
Individual differences in brain organization and structure develop from idiosyncratic differences in experience.
can occur throughout development
reflects individual differences in experience
Babinski Reflex
toes moving when touching foot
Startle/Moro Reflex
arms and legs extend and then rapidly brings arms together
Rooting Reflex
Turn head and open mouth
Sucking reflex
when touch roof of mouth
Tonic neck reflex
turn head one way and arm streches the other way
Dynamic Systems theory
reflexes change in result to multiple independent systems that develop on their own over time.
What happens at 6 month in terms of cross-modal perception
infants can link how object feels to what it looks like, but only if they have touched it
What happens at 12 months in terms of cross-modal perception
ability to transfer information from touch to vision, now can if they have only seen it
Visual Preference
shows 2 images side by side. Time spent looking at each is recorded
Habituation
repeatedly shown a visual stimuli, as stimulus becomes familiar looking time decreases
Hearing Developmental Interference
exposure to intense noise (ie: background noise) can effect tuning of hair cells.
Too much exposure can interfere with meaningful sounds (moms voice)
