Neuroplasticity 1-3 Flashcards
at birth - neural circuits
Rough draft of neural circuits - genetically determined
after birth - neural circuits
neural circuitry is refined by experience - experience dependent reorganzation
Experience dependent reorganization
Based on the experience that the brain gets
when does plasticity occur in response to experience
continues throughout life
particularly heightened during critical periods
Orphan study
Neurocognitive dysfunction is evident in children under social deprivation in orphanages
Longer they stay in orphanage, the higher the incidence of cog impairment
Orphan study - what part of the brain was it noticeable in
Uncinate fasciculus - not as developed in the socially deprived child
visual cortex receives information from
both eyes
Ocular dominance columns
certain areas only receive either left or right eye input
First step of visual perception - crucial that they are separated in this layer and then become integrated in another layer (because of experience)
Ocular dominance - when are the columns developed by
6 weeks
Merzenich - monkeys with sutured fingers together
inputs of 2 fingers always coming into the cortex together - abolishes the sharp zones of the map
Syndactyly
congenital fusion of the fingers - cortical map of the hand is reduced overall - representation of the fingers is not organized somatotopically
Phantom limb sensation -
scar of nervous tissue in strump caused the pain - reorganization of cortical circuits
Remapping occurs - face
Musicians and age started
The earlier they started to play, the more cortical response you see
Does the type of experience or activity determine the type of plasticity
YES
Complex environment paradigm - Rat study
EC rats superior performance in running mazes - also they had heavier and thicker cerebral cortices - more synapses - more dendrites
