The Wire That Was Not a Wire

The model body failed six minutes before the first visitors arrived.

It lay on a table in the hospital atrium, taller than Maya and flatter than a cafeteria tray. Its brainstem was a purple bead. Its heart was red glass. Its lungs were two clear balloons. Its gut was a pink coil of tubing. At the wrist, someone had built a swollen knuckle out of soft red clay.

A gold thread ran from the purple bead down the neck.

When Soren pressed the button labeled Tiny Pulse, the heart blinked once.

Only the heart.

Maya bent so close her hair brushed the plastic ribs. 'That is too small.'

'The heart light works,' Soren said.

'The title does not say The Heart Nerve.'

The sign above the table read The Wandering Nerve. Under it, in smaller letters, The vagus nerve is the longest cranial nerve. It begins in the brainstem and travels through the neck to the heart, lungs, and gut.

Soren pressed the button again. The heart blinked politely, as if it had been waiting alone in a room.

Dr. Imani hurried past with a roll of tape in her teeth and a tablet under one arm. She was small and fast and had the kind of hair that looked as if electricity had been invented inside it.

'Please tell me it works,' she said around the tape.

'It works wrong,' Maya said.

Dr. Imani stopped. 'Wrong is worse than broken.'

Soren pointed. 'Only the heart lights up.'

Dr. Imani took the tape out of her mouth. 'The donors arrive in six minutes. The visitors arrive in eight. If it shows brain to heart, I can talk through the rest.'

Maya’s fingers were already under the model’s shoulder. 'It says wandering.'

'I know what it says,' Dr. Imani said. 'I wrote it at two in the morning. Do not let anyone put the conductive thread in their mouth.'

Then someone called her name from the elevators, and she ran, leaving the tape behind.

Soren opened the little access door in the model’s back. Inside, the wires were neat, which was not the same as right. The gold thread from the brainstem button ran straight to the heart. The lung wire was curled unused around a screw. The gut wire hung loose. A thin red wire ran from the neck to the clay knuckle.

Soren frowned at that one.

Maya saw his face. 'What?'

'That wire is lying.'

'Good. I hate it.'

'The vagus nerve goes to the heart and lungs and gut. But the knuckle is not on that route.'

Maya touched the red clay, then the gold thread. 'Then why is the knuckle here?'

Soren looked at the next sign. It listed conditions in bright hospital blue: epilepsy, depression, rheumatoid arthritis. Below that, another card said researchers are studying how vagus nerve signals affect inflammation throughout the body.

The atrium doors opened. Cold air rolled in with the first families. A toddler in a green jacket dragged a stuffed dinosaur across the floor. Two older kids stopped at the table with the snack robots.

Maya pulled the loose lung wire free. 'It is not a map. It is a conversation.'

Soren did not answer right away. He was staring at the clay knuckle.

In school, when his stomach hurt before speaking in front of the class, people said it was nerves. They said it as if nerves were invisible excuses, as if a feeling with no cast or bandage was only a weather report from a dramatic brain. But here was a nerve with a route. Here were towns along the route. Brainstem. Throat. Heart. Lungs. Gut.

His own stomach made a small, rude sound.

Maya looked up. 'Your gut voted.'

'I am not counting that as data,' Soren said.

'You should. It has wiring.'

Soren almost smiled. Then he took the tape Dr. Imani had left and stuck it to his sleeve so he would not lose it.

They had four minutes.

The model’s circuit board had labels in tiny print. Heart. Lung. Gut. Inflammation. There was a spare relay, a little switch that could let one signal change another signal without pretending they were the same wire.

Soren tapped the relay. 'The knuckle should go through this.'

Maya followed his finger. 'Not neck to knuckle.'

'Pulse to nerve. Nerve to body signals. Body signals to inflammation light.'

'Slower,' Maya said.

'Yes. Not a blink. A change.'

They worked without asking permission because permission was across the atrium arguing with a microphone stand.

Maya threaded the gold line into three branches, one to the heart, one to the lungs, one to the gut. Her hands moved fast, but not carelessly. Soren clipped each branch, tested each connection, then made her wait while he pressed the button.

The heart blinked.

The lung balloons filled with a soft blue glow.

The gut coil lit from top to bottom like a small sunrise trapped in tubing.

Maya made a sound that was almost a laugh and almost a gasp.

'Again,' Soren said.

She pressed the button. Heart, lungs, gut.

The clay knuckle stayed red.

Maya held up the thin red wire. 'Now the liar.'

Soren connected the inflammation board to the relay, not to the nerve itself. There was a slider beside it marked immune signals. He set it in the middle. Maya replaced the plain red bulb under the clay with one that could change color.

'We are not saying cured,' Soren said.

Maya nodded. 'We are saying listened to.'

'And maybe turned down.'

'Maybe.'

The word stayed between them. The first group reached their table. Dr. Imani arrived at the same time, breathing hard, her badge turned backward.

'Children,' she said, which was never a good beginning.

Maya pressed the button.

A tiny click sounded inside the purple bead. Gold light ran down the neck, split at the chest, and found the red heart, the blue lungs, and the pink gut. Half a second later, the relay ticked. The clay knuckle shifted from angry red to a softer amber, not gone, not fixed, but changed.

The toddler dropped the dinosaur.

One of the older kids leaned so far over the table that his mother caught the back of his coat.

Dr. Imani’s mouth opened. Nothing came out. Then she looked at the model’s back, saw the relay, and shut her mouth again.

Soren said, 'It is not a remote control for a body.'

Maya said, 'It is a way to send small pulses to a nerve that already talks to many places.'

Soren pointed to the purple bead. 'Doctors use electrical stimulation of this nerve for epilepsy and depression.'

Maya touched the clay knuckle. 'And for rheumatoid arthritis, the inflammation part is not a straight wire. It is more like changing the message room.'

'Not all the messages are known yet,' Soren said.

A girl in a yellow hat raised her hand, though nobody had asked for hands. 'If it talks to your gut, is that why my stomach hurts when I am scared?'

Soren looked at Maya.

Maya looked at Soren.

Dr. Imani started to speak, stopped, and folded her arms around her tablet.

Soren moved the model aside so the girl could see the gold thread traveling down from the brainstem, past the throat, past the heart, past the lungs, into the gut.

Maya pressed the button again.

The lights moved through the body in their strange order. The girl in the yellow hat put one hand on her own stomach. The boy beside her pressed two fingers against his neck, in the wrong place but very carefully.

Dr. Imani whispered, 'Well. That is much better than my version.'

Maya heard her but did not turn around. The model had extra ports along the edge of the circuit board. Some were labeled. Some were blank. One was labeled Unknown in Dr. Imani’s two-in-the-morning handwriting.

Soren saw Maya looking.

'No,' he said.

'You do not know what I am thinking.'

'I know there are unused clips.'

'Then you know enough.'

He took the spool of blue conductive thread from the tool tray. Maya held out her hand.

Soren clipped the thread to the tiny port marked Unknown, and Maya fed the spool over the table’s edge until a blue line curled across the white floor.