Kinesiology 3347A/B Lecture Notes - Lecture 14: Motor Coordination, Connectome, Spatial Cognition
8 Mar 2020
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Document Summary
Growth and motor development: add 5-8cm and 2. 75kg / year. Large muscles coordination continues to improve, children show increases in hand-eye coordination, strength, and speed. Improved fine motor coordination makes writing, playing instruments, drawing, cutting, and many other skills possible: girls are ahead of boys, at 12, 94% of adult height, boys 84, girls have more body fat and less muscle tissue. Sex differences in skeletal and muscular maturation cause girls to be better coordinated but slower and weaker. Steady increase in myelinization of neural axons across the cerebral cortex: sensory and motor areas first, may be linked to the striking improvement in fine motor skills and hand-eye coordination around 6-8. Further myelinization of: frontal lobes - logic and planning, reticular formation - controls attention. Selective attention becomes possible: association areas - where sensory, motor, and intellectual functions are linked. Sleep disturbance gains importance: 1/3 are tired in the morning in grade 9.
