Complex sentence: Neuroscience of free will refers to recent neuroscientific investigations shedding light on the question of free will, which is a philosophical and scientific question as to whether, and in what sense, rational agents exercise control over their actions or decisions.
Split into simpler sentences: Neuroscience of free will refers to recent neuroscientific investigations shedding light on the questions of free will. One question is whether, and in what sense, rational agents exercise control over their actions or decisions.