PSYC4220 Notes 9/14
PSYC4220 Notes 9/14 PSYC 4220
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This 4 page Class Notes was uploaded by Caitlin Conner on Monday September 14, 2015. The Class Notes belongs to PSYC 4220 at University of Georgia taught by Kacy Welsh in Summer 2015. Since its upload, it has received 43 views. For similar materials see Developmental Psychology in Psychlogy at University of Georgia.
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Date Created: 09/14/15
PSYC 4220 SEPTEMBER 14 2015 NOTES Dynamic systems theory Development of motor skills involves coordination of vast number of skills body areas and environmental in uences Emphasizes the importance of babies motivation in development of motor skills Environment can in uence speed of development within limits Major milestones see g 57 pg 125 Locomotion Roll over 24 months Sit without support 6 months Crawling around 810 months Walking around 1113 months Manipulating objects Grasping re ex gone 24 months Voluntary reaching 3 months Ulnar grasp grasp things between ngers and palm 46 months Pincer grasp grasp things between thumb and fore nger 89 months Scribble with crayon 16 months Copy simple line build with blocks 2 years Physical development Also follows principles of growth especially cephalocaudal and proximodistal Height and weight increase rapidly over 1st 2 years 12 of adult height by age 2 triplequadruple birth weight Skeletal development Bones harden become dense larger over early childhood Skull birth soft made of several bones Fontanelles places where bones of skull meet by around age 3 ll in with mineral deposits body proportions change over childhood infants are all head head is 70 of adult size 14 of total body length by age 2 head is 15th of body length Brain development Neuron proliferation neurons multiply very rapidly Up to 250000 neurons per minute Occurs during prenatal development 1020 weeks gestation most rapid proliferation most neurons are formed by end of 6th month of gestation Brain growth spurt 7th month of gestation2 years old due to rapid production of Glial cells cells that support neurons myelination neurons are coated with myelin which helps speed transmission isn t fully nished until early 205 synaptogenesis production of synapse connections between neurons start with few connections between neurons from birth2 connections multiply rapidly infant has 4050 more neurons than adult needs Synaptic pruning loss of synapses by neurons that are rarely stimulated Deprivation of experience has negative impact on birth Chimps raised in darkness No visual stimulation to allow visual areas to develop Retinas optic nerve did not develop properly Result functionally blind Enrichment can have positive impact Rats in enriched environmentcortex heavier increased complexity of neurons increased chemical activity Plasticity degree to which a developing structure behavior is modi able due to experience Neural plasticity greatest during 1st several years of life