PSY 405 Chapter Notes - Chapter 10, 11: Nonstress Test, Lateral Geniculate Nucleus, Birth Weight
6 Oct 2016
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Gross: coordination of large muscle groups (walking, etc) Fine: smaller muscles of the arms and hand, manipulative activities (drawing) Typical month of onset and gross motor skill. 2-3 lifts head and chest with arm support on tummy. Motor delays do not predict iq delays. Motor development is not completely independent of cognitive development. However, still finding new links: childhood cerebellar patients showed impairments were noted in executive function, including planning and sequencing, and in visual- spatial function, expressive language, verbal memory and modulation of affect (levisohn, 1999) Action generate perceptual info: motor skill (cid:0) perception, visual cliff- baby placed on shallow side and called to cross the deep side by parent. Motor neurons leaving the spinal cord myelinate mid-gestation. Pathways from primary motor cortex begin to myelinate after birth and up to 2 years after. Premotor, sma and cerebellum much later- 6 months and beyond. Need opportunity, practice and strength and coordination for it to emerge.
