illusions

My friend Rich is an inspiration. His name is also descriptive, and though not wealthy he leads a rich life, working, tinkering (his most recent project is a restored Model-A), socializing, and mostly spending a lot of time with his wife, children, grandchildren, and great-grandchildren. Depression, idleness, and moping are not in his nature.

His medical history has been a rough road full of potholes. Ten years ago he was diagnosed with prostate cancer and had the diseased organ surgically removed in a standard procedure which, though common, is a terrifying bloodbath. Today he's cancer-free, but after the operation began showing symptoms of both diabetes and Parkinson's Disease, and today lives with both.

A few months ago he read in a magazine about a contraption that "fools the brain" of Parkinson's sufferers, and can cause the tremors associated with the disease to temporarily stop. Being the practical, hands-on kind of guy he is, Rich built one using just the description in the article to guide him.

Piece of cake.

He brought it into our morning yoga class today so we could try it out, a simple three-sided box, open at both ends, with a mirror mounted on one side. "Stick your right hand inside the box" he says to me. "Now lay your left hand on the table and look at it in the mirror."

I did, and my trembling right hand went slack inside the box. The muscles of the right forearm began to relax and in a few seconds were completely at rest. Apparently what happens is the brain "sees" the mirror image of the left hand as the right while the "real" right hand is invisible. Because the eyes and brain perceive the illusory hand at rest rather than shaking, the brain responds by making manifest what it sees as reality. There are some profound philosophical insights in that last clause.

"We are what we think." So opens the Dhammapada, purported to be the actual sayings of Gotama, the Buddha. "All that we are arises with our thoughts. With our thoughts we make the world."

An interesting detail of this little experiment is that the box can only short-circuit the brain if it is to one side or the other of the person using it. The mirror trick works because the thumb in the mirror image of the left hand appears to be pointing left when the palm is down, while the thumb on the "real," invisible right hand is pointing left. Also, the fingers appear in reverse order. If the mirror is in front of you, the mirror image doesn't reverse; the left hand is still on the left, with its thumb pointing toward the right.

The human brain is an inconceivably complex and mysterious organ, and the human mind a strange and frightening place. We should never go there alone.

Pencil drawing by M.C. Escher; German, 1930's.

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