I expect balancing on a tightrope and juggling apples while listening to Mozart would trigger more brain activity than say playing chess, and while there are many ways to measure/define brain activity, still, is there any human activity that is known to be 'the most taxing'?

Brain activity I suppose can be measured as some function of below suggestions, or is there a commonly accepted definition?

  • Energy consumption
  • Number of neurons/synapses involved
  • Amount input 'data' consumed
  • Amount of output 'data' generated

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