頭脳

1. Origins, structure, and basic meaning

• Structure: 頭脳 (ずのう) combines head 頭 and brain 脳 to denote intellect or the strategic mind of a group.
• Basic usage: It describes the person devising a team's strategy and the flexible thinking needed for a hard problem.

2. Common pitfalls and similar expressions

• The brain as a metaphor for intellect
  • チームの頭脳 identifies the key thinker or strategist, not a literal anatomical organ.