Udana vayu is situated in the neck and head. It governs speech and self-expression. It is also related to the spine and your ability to "hold yourself up" and, more generally, your ability to be yourself.
Udana is a spiraling current that flows in the neck and head and spins outward. I understand it not as our spinning thoughts, but as a deeper current that is our authentic self-expression. We access this current often, in moments of calm and love.
