Proprioceptive

Human speech would be impossible without the proprioceptive sense. (Proprioceptive refers to the sense within the organism itself which detects or controls the movement and location of the muscles, tendons, and joints which are used to create speech.) Our mouth, vocal cords, diaphragm, and lungs incorporate thousands of nerve sensors which the brain uses to control the movement and position of these same organs—the mouth, vocal cords, diaphragm, and lungs. Imagine the complexity of pronouncing even a single word with the need to coordinate the tongue, breath control, and jaw muscles. Now multiply this complexity exponentially as sentences are constructed in rapid succession during normal speech.