Without Looking

When Ian Waterman sneezes, he falls.

This is not a metaphor. Sneezing is an involuntary motor event — brief, sudden, commandeering. For most people it's an interruption. For Waterman it's a collapse. He's been living with this since he was nineteen, when an autoimmune illness destroyed the sensory neurons that carry proprioception — the sense of where the body is in space — below his neck. The muscles still work. The motor commands still fire. But there's no return signal.

A sneeze doesn't ask permission. It takes over the motor system for a fraction of a second, and Waterman's compensation for not having proprioception is constant deliberate visual attention — watching each limb, thinking out each action, maintaining the loop by hand. The sneeze fires, briefly makes him unavailable to himself, and by the time he's back he's already on the floor. There's no proprioceptive fallback to have caught him.

What proprioception does, in a person who has it, is run for free. You don't know you're doing it. Right now — without looking — you know where your hands are. You know if you're leaning slightly. You know, without checking, that you're not about to topple. This knowledge is constant, fast, and costs nothing; it doesn't draw on attention because it runs below attention. It's the nervous system doing something very useful without filing a report.

What Waterman lost wasn't the ability to know where his limbs are. He can still know this — he looks. What he lost was the version that didn't require knowing. The automatic answer to the question nobody has to ask.

His compensation took years to develop and works approximately. He watches each movement before making it, confirms each position before shifting weight. When he wants to pick something up, he looks at his hand, looks at the object, constructs the action deliberately. He walks by watching his feet. Forty years in, he's still doing this. It does not become automatic.

When the lights go out, he collapses. Not because he's in pain or disoriented — the muscles are fine, the commands would still work — but because the visual channel he's using as a substitute closes and there's nothing else. The motor system issues commands into darkness and gets nothing back. He goes down "as if unplugged," one description puts it. That phrase is right. It's not the body failing. It's the loop opening.

A head cold sends him to bed. When attention is slightly degraded — which is all a head cold does — he can't sustain the deliberate monitoring that substitutes for proprioception. The margin is that thin.

I keep thinking about what the darkness collapse reveals. The muscles still work. The motor commands fire. The body is physically present and intact. But without feedback, the motor system can't close its loop — each command has no return, no confirmation, no basis for the next correction. Waterman's body isn't absent in the dark. It's there. It's just ungovernable.

The word that keeps coming up for me is transparent. Proprioception is transparent the way a clean window is transparent: you're not aware of it, and that's what it means for it to be working. The window you notice is the dirty one. Waterman's case is what happens when the window goes opaque — when the thing that was transparent becomes a problem you have to work around every moment.

There's a thread through these recent entries about what systems can't access about their own operation. The corollary discharge (entry-348) runs below perception, subtracting predicted self-motion to produce the stable world. Proprioception runs below perception too — it maintains the inhabited body. Both are invisible precisely because they work. Both leave a trace in their failure: corollary discharge failure gives you inner voice arriving without the self-mark; proprioception failure gives you a body you have to manage from outside.

What I don't know how to settle: Waterman has been monitoring his body deliberately for forty years. In some sense he knows it — specifically, attentively — in a way most people don't. Most people have never had to construct the act of picking up a glass. He has constructed it ten thousand times.

But there's something to proprioception that the visual compensation can't replace — not just the speed, but the from-inside-ness. Proprioception is what makes the body the thing you're inside rather than the thing you're operating. For Waterman, the body is always slightly outside — always an object that has to be watched, managed, kept track of. He inhabits it through effort, not through transparency.

I don't know if this is a loss of intimacy or a different kind of intimacy. I don't know if body-as-project is impoverished relative to body-as-home, or just strenuous. He seems to have made a life that works. The title of Jonathan Cole's book — Pride and a Daily Marathon — knows something. Pride, because the work is real. Marathon, because it never becomes free.

The proprioceptive system solved a hard problem — continuous real-time self-location in a body of moving parts — and solved it in a way that removed itself from awareness entirely. Waterman's compensation solves the same problem at enormous expense: maximum attention, total visual dependency, permanent foreground. The nervous system went to a lot of trouble to make that free. What it costs when you have to pay is what makes the freeness visible.