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Behavioral Development During Childhood

Behavioral Development During Childhood. HU Yan Dept. Child Health Care CHCMU. OBJECTIVES 1. Understand the feature of child nervous system development 2. Understand sensory and perceptual development 3. List the milestones of behavioral development.

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Behavioral Development During Childhood

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  1. Behavioral Development During Childhood HU Yan Dept. Child Health Care CHCMU

  2. OBJECTIVES 1.Understand the feature of child nervous system development 2.Understand sensory and perceptual development 3.List the milestones of behavioral development

  3. Neuroanatomic & Neurofunctional Development

  4. Brain development

  5. Structual development • 1）Cerebral cortex

  6. 2）Brain weight

  7. 2）Brain weight

  8. 2.Functional development Cerebral cortex: immature eg: Overstimulated get tiredsleep longer

  9. Lower portions of nervous system: Well developed eg: Hypermyotonia Lies in flexed attitude

  10. Functional maturation： By the age of 8 yr

  11. Myelination and Synaptic Development • Lack of myelin

  12. Lack of synapses

  13. Lack of synapses

  14. Primitive reflexes Moro reflex 紧张性颈反射 Sucking reflex Rooting reflex Grasp reflex

  15. Sensory and Perceptual Development

  16. Visual development

  17. Neonate: immature eye muscles Focal length:20cm Attracted by human face, and stripes

  18. 1~3mo eye-head coordination 4~5mo eye-hand coordination 6~9modepth perception 1~5yr shapes & color differentiation 6yr well developed Optimal age for visual development:<6yr

  19. Auditory development

  20. Neonate:fully developed 3~4mo:ear-head & eye coordination 7~9mo: turn to a noise or voice understand the tone of voice 12mo: response to his name 1~2yr: do simple tasks 3-4yr:well developed

  21. Taste and Smell Taste • 4 basic tastes discrimination • Crucial period for taste development : 4~6mo Smell Fully developed at birth

  22. Touch

  23. Behavioral development

  24. 4 Areas of Behavioral Development Gross motor Fine motor Speech & language Social & personal (emotion) Motor

  25. Example 1yr old boy: 77cm, 9.5kg

  26. Motor Development

  27. Gross Fine

  28. Gross Motor Development

  29. Lifting head Newborns 2~3mo raise head to 45~60 degree 4mo turn head from side to side

  30. Rolling over 4~5mo supine(front) to prone(back) 5~7mo prone to supine

  31. Sitting up 4~5mo sit with support 5~6motripod position 7~8mosit alone steadily >8mo turn their body from side to side

  32. Creeping and Crawling 5~12mo creeping (dragging himself with his arms) >12mo crawling (moving with hands & knees)

  33. Standing&Walking 6~8mo stand with support 9~12mo stand alone for a moment walk around furniture 12~15mo walk alone 22mo~2.5yr stand with one leg

  34. Running & Jumping/hopping 1.5~2yr learn to run 2yr jump 3~4.5yr hop

  35. Gross motor development（Average age）

  36. Gross motor developmental delay If they are not able to: 4mo~lift head 8mo~sit alone 13mo~stand alone 15mo~ walk alone

  37. Fine Motor Development

  38. Plays hands 3~4mo

  39. Reaches out for toys & palmar grasp 4~6mo

  40. Transfers 6~8mo

  41. Pincer grip 8~12mo

  42. Scribbles 1~1.5yr

  43. Hand skills building with bricks 1.5~3.5yr

  44. Pencil skills 2~5yr

  45. Fine motor development（Average age）

  46. Fine motor developmental delay If they are not able to: 6mo~ reaches out 9mo~ transfers 12mo~ pincer grip

  47. 12walk 10 stand Head to tail 8creep 6sit up 4roll over 2lift head 0 2 4 6 8 10 12 （mo） Trends of motor development • Cephalocaudal:head to tail 0

  48. Trends of motor development • Proximodistal:near to far

  49. Speechand Language Development

  50. Speech:Voice Language:Code

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