Experience affects the activation of neural networks
When information from an initial stimulus enters the brain, neural pathways associated with that stimulus are activated, and the stimulus is interpreted in a specific manner.
Source
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"NIMH · Imaging Study Shows Brain Maturing."
http://nimh.nih.gov/science-news/2004/imaging-study-shows-brain-maturing.shtml
National Insitute of Health
Public domain.