A neuroscientist asks a human participant to extend her leg at the knee. EEG recordings of the participant's brain activity should show increased activity from the scalp over the lobe, where the motor cortex is located

The answer is the frontal lobe.

Explanation:

The frontal lobe is located behind the forehead and it is useful in the fact of regulating the higher intellectual functions. The frontal lobes are relevant because they help to control thoughts, reasoning, as well as behaviors.  

In humans, the frontal lobe is in charge of internal mental activity, this is usually called Prefrontal Synthesis. The function of the frontal lobe is related to projecting future consequences according to the current actions. The frontal lobe also eliminates those responses that are socially unacceptable and there is a differentiation of tasks.  

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