the.com/concussion
A concussion is a brain injury from a blow or jolt, and it should always be taken seriously.
means A traumatic brain injury caused by a blow or jolt that makes the brain move rapidly inside the skull, temporarily disrupting normal function.
from From Latin 'concussio,' from 'concutere' — 'to shake violently,' built from 'com-' (together, intensifying) plus 'quatere' (to shake). The same root that gives us 'quash' and 'squash' — all about violent, forceful shaking or striking. Early uses described the shaking of anything, from earthquakes to artillery blasts; by the time doctors borrowed the word for head injuries, they kept the sense exact: something shaken hard enough to stop working properly.
- actual cause
- brain sloshing and twisting inside cerebrospinal fluid
- imaging myth
- normal CT scan does not rule it out
- recovery rule
- rest helps, but total darkness and silence does not
- repeat risk
- second one before healing can be far more dangerous