How to say "concussion" in Japanese

• 脳震盪のうしんとう
  nounThe specific term for concussion as a brain injury caused by a blow to the head. Use this when 'concussion' refers to the injury itself, as in sports or medical contexts.
  脳のうしんとうを起おこしました。↗

  I had concussion.
• 震盪しんとう
  noun, suru verb, transitive verb, intransitive verbA broader, less common word for a violent shock or shaking; 'concussion' is only one of its senses. For the brain injury it is seldom the word you want — that is really 脳震盪.

Both are less common choices: use 脳震盪 for the brain injury itself, while 震盪 means shock or violent shaking generally, with 'concussion' only one of its senses.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 脳震盪のうしんとうconcussion (of the brain)
• 震盪しんとうshock