psych 333 Prenatal

What is gestational age

Duration of pregnancy from first day after last menstrual period

What is conceptional age

Time elapsed since actual conception two weeks younger than GA

What is experience independent plasticity

• Changes in the brain that occur, regardless, a specific environment and shape

• Neurogenesis, neuronal migration

What is experience expectant plasticity

• Readiness to adapt species typical input = Critical period

• Wiring, neural, pruning, myelination

What is experience dependent plasticity

• The brain adapt and recognizes to individual experiences

• Synaptogenesis

• Late neurogenesis

What is plasticity

Learn, change the ability of the brain to change itself from it experiences = rewire

What is prolepsis

• Treating a future state as if it already existed

• Caregivers projection of who the child will become

• Adult adults interact with a child based on a assumptions in the future

• Parents sent boundaries for development which become an increase or decrease of their influence on the child

What is neurogenesis

• between 8 to 20 weeks GA

• Billions of neurons being produced

• Around 200 Billion by 12 to 18 weeks GA

  
  

What is migration of neurons

• After division neurons head to the brain

• Turns into complex/layered structure with six cortical layers

• Abnormalities in migration can lead to issues with the body/areas of the brain

What happens to neurons after birth

• 12 months after 15,000 neurons Being produced

• 2500 neurons from full term

what happens at 24 weeks GA

• Formation of axons, dendrites, and synapses in neurons

• Firing starting

What is synaptogensis

• at 24 weeks

• all synapses form

What is apoptosis

• 20-36 weeks

• Neural pruning Where the system corrects for overproduction of neuron/synapses

• Elimination due to genetic programming, limited resources, over activity

• Tuned for environmental needs

What is myelination

• 28 weeks GA

• Myelin wraps around the axons

• Increases function and speed decreases leakage

• Pour Milan can lead to cognitive impairment/disorders