Class Notes (839,146)
United States (325,795)
Psychology (309)
PSB 2000 (92)

Development, Pasticity and Brain Damage.docx

3 Pages

Course Code
PSB 2000
Orenda Johnson

This preview shows page 1. Sign up to view the full 3 pages of the document.
Statutes -Recognize that infants and toddlers need education and care because their brains are developing ant a normal rapid rate Development of the Brain -Brain isn't fully developed at birth -Different parts of the brain develop at different times -Significant brain growth during childhood -The environment modulates this development Object Permanence (Piaget): Prefrontal cortex, this occurs around 7.5 months to a year (Goldman-Racik) where the child recognizes that an object is there even when it is being covered Before Birth (Prenatal Development) -Dorsal surface of the embryo thickens and developed a neural plate then the neural groove which fuse into neural tubes -This tube then becomes the CNS and the cavity within it becomes the ventricular system Brain Development -Differentiation of major regions of the brain -Expansion of forebrain, the cortex -Different parts of the brain are starting to form and develop What do neurons do in brain development? Kind of in this order with an overlap 1. Proliferation: Division of new cells, going to develop initially within the walls of the ventricles 2. Differentiation: When they decide which kind of cell they want to become, a neuron or a glial cell Progenitor cells get to choose, Neuroblast or Glioblast then further differentiates 3. Migration: Develop initially within walls of ventricles but then migrate out to different parts of the developing brain 4. Myelination: Occurs within the first years of life 5. Synapse formation: Where they form connections with each other, critically important because the neurons that don't form strong connections are not likely to make it within the development process 6. Pruning: Some neurons that don't form good connections, we just get rid of them because we make more than enough Malformations can be caused by (A) defective migration or -Heterotopias, gray matter that shouldn't be there, cells never properly migrated, nuclei of cells embedded in white matter too -Assosiated with seizures and schizophrenia (B) defective proliferation -Lissencephaly, when you don't have all of the groves in the cortex, much fewer neurons that there should be in the cortex, a smooth cortex -Some connections and myelination are made but there is severe impairment in these individuals Pruning occurs through programmed cell death called apopteosis -Cells turn genes on that initiate their death and die in a controlled way -In prefrontal cortex during late teens early 20's, increases in short term memory, increase in white matter and decreased neuron number To be or not to be -Signal comes in the form of a neurotrophin, that tells the neuron it isn't forming a good synapse -This is a chemical that promotes the survival
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.