Brain Function

noun the quality of acting on impulse or without forethought

adjective impulsive (related to or characterized by impulsiveness)

• His impulsiveness often led to hasty decisions that he later regretted.
• She tends to act on impulsiveness without thinking things through.
• Dude, your impulsiveness is gonna get you in trouble one day.
• The impulsiveness of the storm caused chaos and destruction in its path.

noun the faculty of reasoning and understanding objectively, especially with regard to abstract or academic matters

• His intellect was evident in his ability to solve complex problems effortlessly.
• She's got quite the intellect when it comes to trivia games.
• That guy's got some serious brainpower, his intellect is off the charts.
• Her intellect was a shining beacon in a sea of ignorance.