It is particularly relevant in relation to that article that surfaced here, about mapping out emotions arising from a large sampling of people.
I will say though, that thoughts do not simply arise from emotions in introverted people -- it arises like that in pretty much everyone. Some extraverts are just that in tuned with their bodies, emotions, and intuitions; others use talking as a way to avoid getting in touch with feelings, much that same many thinkers use thoughts to avoid getting in touch with feelings.
Lastly, loneliness tends to be a particular feeling lodged in the chest (for a lot of people). Regardless of whether you label that sensation as loneliness or not, there are physical exercises that can work with it directly. The main thing is to relax the muscles and tissues surrounding the chest cavity and give those sensations an opportunity to move and flow. It is best done when your arms are (physically) wide open.
Loneliness comes from a feeling of not getting sufficient emotional connection from others. There are lots of configurations that can lead to that. One of the main ones is that, the very act of connecting to someone else requires opening up, and opening up usually leads people to feeling the vulnerability that they don't want. Physically opening up the arms and the body helps you get used to feeling open, and being so, it becomes easier to connect with others.
Hope this help some of you folks -- good times :-)