Here are some talks that I have found on the subject:
Reading minds through body language | Lynne Franklin | TEDxNaperville
In this talk Lynne Franklin suggests that people's brains process information – or think - in three different ways and makes suggestions as to how to connect with these 3 different types of people - listeners, lookers and touchers (people who process information in feelings and tactilely) by understanding how their bodies communicate.
Understanding body language is not only about judging people on the basis of how they are reacting but it's about understanding how their brain works.
Lynne Franklin suggests how you can communicate with others more effectively by modifying your language and actions so as to present what you are saying in a way that others relate to more easily. When you reflect, in a conscious way, on the language you use, both body and verbal, you have the opportunity to build a better rapport and reach the full spectrum of people you engage with.
She summarises that
People who are lookers will use more visual language.
People who are listeners will use more auditory words.
People who are touchers will use more feeling, kinaesthetic words.
Body language, the power is in the palm of your hands | Allan Pease | TEDxMacquarieUniversity
Allan Pease is an Honorary Professor of Psychology at ULIM International University, who researches and studies selling relationships and human communication.
There are more connections between your brain and the palm of your hands. This visual and humorous talk is about how our hand positions and gestures can say so much without words.
Body language is an outward reflection of our emotional condition. Allan Pease suggests that if we intentionally take certain positions and practice them, it can change how people perceive you and it has been proven to change your own physiology and you will start to feel different about yourself.