4_prenatal_dev___exp - Human embryological development...

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1 Human embryological development State organization (24 - 32 weeks) - Onset of recurrent and predictable cycles of activity 40 min cycle: retained after birth 96 minute cycle: not retained REM “sleep” - Rapid eye movement with qualitative changes in brain activity - spends 78% of time in REM Eyes open 1 Human embryological development Auditory system responsive (24 - 30 weeks) - cardiac and motor reactions to vibroacoustic and air-coupled stimuli (120 dB ex utero , 90 dB intra-abdominal) - maternal speech is more salient than outside speech Integrated expressions (32 - 36 weeks) - grimaces, smiles present 2 Birth Approximately 40 weeks Continuity of sensory function from prenatal to neonatal environment Implications of prenatal experience for postnatal behavior - really a “buzzing blooming confusion” (James) ? 3
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2 What is development? Habitat: “address” Niche: “occupation” - the functional relations between an organism’s capacities and the environment Development is a series of adaptive changes to a series of environmental challenges - Organism and environment change one another - Niche construction: through mutual modiFcations, new relationships emerge over developmental time 4 Examples Humans (Decasper, Spence, ±ifer)
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4_prenatal_dev___exp - Human embryological development...

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