頭あたまを切きり替かえる

expression, ichidan verb

change one's mindset; switch mental gears; shift focus

Used when consciously redirecting one's thoughts, often to tackle a different task or adopt a new perspective. Common in work, study, or after a break.

• 休きゅう憩けいのあと、頭あたまを切きり替かえて次つぎの問もん題だいに取とり組くんだ。

  After the break, I switched mental gears and tackled the next problem.