筋きん緊きん張ちょう症しょう

noun, noun which may take the genitive case particle 'no'

myotonia

Medical term for a condition where muscles are slow to relax after contraction. Used in clinical contexts.

• 筋きん緊きん張ちょう症しょうの患かん者じゃは、物ものを握にぎった後あとに手てを開ひらきにくい。

  Patients with myotonia have difficulty opening their hand after gripping an object.