The soul only has a definite position and definition per paradigm you are educated in. I view the soul and spirit as different. The soul being my Over-Self, the aspect of awareness that I cannot explain, the aspect that creates magical influences via unseen and scientifically misunderstood/not yet discovered means. Some call it fate, fortune, luck, god, goddess, chaos, etc. My spirit on the other hand, going back to its root meaning, is just the power of my breath and electromagnetic fields, what I have come to know as 'qi' from the Chinese Martial, Medical, and Spiritual traditions.
The full body tingling sensation is a biochemical reaction of deep states. Feeling your spirit in your solar plexus or brain stem, or wherever, is just the same, your biochemical and natural elecrromagnetic force surging through and around your body. The spirit can be measured, for the most part, but the soul is pure awareness. At least that is my perception and experience.