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006
Field Note · 006
The cursor that remembers.
On the first cohort of brain-computer interface patients. Spring 2026.
Neuralink's first patient began controlling a cursor by thought in 2024. Synchron's Stentrode patients have been doing similar work, with a less invasive approach, since 2022. The footage is widely available. The patient testimonials are more interesting than the demos.
01 /
Patients describe the cursor as moving "by thought." They also describe a small lag, not mechanical but interior. One patient said it felt like remembering rather than reaching. He said it the way you would say a song was familiar.
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Within weeks, the cursor enters the proprioceptive map. The brain begins treating it as a limb. This is not metaphor. This is what the literature on phantom limbs and tool use has been describing for decades, now happening on a deliberate schedule.
03 /
The interface installs itself into the body of the person using it. The reverse is also true: a piece of the person installs itself into the device. The boundary that has been the central assumption of human-computer interaction since 1968 is, for these patients, no longer where it was.
We do not yet have an ethics that knows what to do with a tool that becomes part of you. We have an ethics for prosthetics. We have an ethics for software. We do not have one for the seam between them, which is where these patients now live.