Comment by hnick

> The fact that she associates a sensation of contraction in the forehead as thinking is very interesting.

Makes sense to me. A furrowed brow is a common trope of thinking hard about something, it'd make sense if the same happens on a smaller barely perceptible scale for other thoughts (supposedly this happens to our vocal chords when subvocalising in our heads). Something about focusing the senses when processing thoughts I would guess.