髄膜

1. Origins, structure, and basic meaning

• Structure: 髄膜(ずいまく) names the tissues surrounding the brain and spinal cord; 膜 means membrane.
• Basic usage: The examples explain the tissue's role or describe examining it for inflammation.

2. Common pitfalls and similar expressions

• What 髄膜 and 脊髄 refer to
  • 脊髄(せきずい) is the spinal cord, while 髄膜 refers to the tissues surrounding it and the brain. The shared 髄 does not make them the same structure.
• ないか marks what is being checked
  • 炎症がないか frames the question of whether inflammation is present. Reporting an examination does not establish that its result was negative.