TB3 Lecture 2 Brain Development

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  • Created by: mint75
  • Created on: 25-04-15 19:01

1. Why is the pregnant person most sensitive to radiation at this time?

  • This is the critical period of prenatal brain development, with neural proliferation and migration, migration not occuring correctly has serious effects
  • As the infants developing brain is at peak plasticity
  • As this is the period in which synaptogenesis occurs
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2. What did research by Perry & Pollard (1998) show?

  • The children who suffered severe global neglect had much smaller frontal occipital circumferences and growth/organisation than conrtols
  • The children who suffered severe global neglect had larger brains than controls
  • The children who suffered severe global neglect had much larger frontal occipital circumferences and growth/organisation than conrtols
  • The children who suffered severe global neglect had smaller brains than controls

3. What is the darwinian reflex?

  • When the palm of a babies hand is stroked, they make a strong fist and can be raised to standing if grasped
  • When a baby is dropped/hears a loud noise, they extend limbs and fingers whilst drawing their head back as a protective reflex
  • When a baby is held with their feet barely touching a surface, they will make stepping motions
  • When a baby will grab anything that comes in close proximity to their face, a protective reflex

4. What is the second stage of brain development?

  • Neurogenesis and cell migration
  • Folding of the neural plate to form the neural tube
  • The formation of the hindbrain
  • Cell insulation

5. What is apoptosis and why does it occur?

  • The formation of sulci and gyri to accommodate more neurons
  • Programmed cell death of poorly stimulated neurons; increases efficiency of functioning
  • Increase of brain surface; to increase cell stimulation
  • Buildings of connections between synapses to 'finely tune' the brains 'circuitry'

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