[leemck]

The article title and headline sentence confuse the reader.

Proprioception is an interesting and exciting mental process that is important to artistic expression, human growth, mental development, and cultural communication.

Whew. The opera "Nixon in China" has an embedded ballet. The embedded ballet has the uncanny property that in a few minutes it retells the entire story of the opera.

Why is ballet so expressive? Why does the nation of Russia need ballet? Notice on youtube, the Russian dancers are extraordinary. A prima ballerina who came to New York, drew comments that "She dances in Russian." And the untutored viewer could see it too. The nation devotes considerable resources to the art.

What is happening when 1st through 5th graders in an American Elementary school run around and scream at the beginning of the school year? Were they running around to generate huge amounts of propriaceptive signals to the brain? Is the screaming part of the brain sending motor control signals every which way?

Finally, why do opera singers stand up to sing? Except when they are dying or portraying a special propriaceptive statement like kneeling (to pray or be beheaded).