medium · LSAT Reading Comprehension
For a long time, the prevailing view held that the brain's structure was fixed once childhood ended. This view drew support from a familiar clinical observation: when adults suffer brain injuries, the resulting functional deficits are typically permanent, whereas children who sustain comparable injuries frequently regain lost functions.
According to the passage, observations of brain injuries supported the traditional 'fixed brain' view because:
- adults rarely recovered lost functions after a brain injury, while children often did, suggesting the adult brain could no longer rebuild itself
- adults are more inclined than children to take part in risky activities that lead to head injuries
- the imaging technology of the era was too primitive to observe the brain during an injury
- the hippocampus happens to be shielded from most forms of traumatic damage
- adult brain injuries were found to heal completely whenever proper rehabilitation was provided
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