The insula is a brain area that allows for interoception and exterception, enabling attention to be split between one's own feelings and the feelings/sensations of another.

“The insula is a really interesting brain area that allows us to interoscept to pay attention to what's going on inside our body and to split some of our attention to extercept. And the insula is essentially splitting one's attention between how we feel ourselves, how our body feels, what we're thinking with the thinking and the body bodily sensations of the other.”