Our need for social interactions is as fundamental as our need for proper nutrition and adequate sleep. Here's what happens when it goes unmet.
Monkeys raised in partial or total isolation since birth were hostile toward others and could not form adequate social attachments inor adulthood. The degree of social damage was related to the duration of social isolation. Sophisticated neuroimaging analyses of humans and monkeys revealed structural alterations in two critical brain regions for normal social interactions and emotion control, the prefrontal cortex and amygdala.
Cellular changes in response to social isolation included significant alterations in oligodendrocyte development. Oligodendrocytes form the myelin, which is called white matter. It is critical for neuronal communication. Neuroimaging studies reported abnormalities of consistently reduced total gray and white matter volumes in the prefrontal cortex and hippocampus.
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