Ken Robinson PhD made it a point to "point out" in his book "The Element" that most people stop with the five senses they learned in childhood: smell, sight, sound, taste, and touch. They rarely think about the other senses, if they even know about them. Ken listed four more "senses." Here are numbers three and four:
3. Equilibrioception - a sense of balance and acceleration. The fluids and bones of the inner ear mediate a sense of balance. A damaged sense of balance can create all manner of havoc in one's life!
4. Proprioception - a sense of where our bodies and arms and legs are in space and in relationship to each other. No surprise, this sense is essential for human being to get up, get around, and get back again to where they started.
That makes at least nine sensory systems, according to Robinson. Who knows? It might not stop at nine, either!