Surface Electrodes Trade Precision for Safety
Precision Neuroscience
This tradeoff means Precision is betting that easier surgery and lower tissue damage can matter more than absolute signal fidelity. Its Layer 7 array sits on the cortex instead of entering brain tissue, which can reduce trauma, but surface recordings mostly capture pooled activity from nearby neurons rather than the cleaner single unit signals that penetrating arrays target. That matters most for tasks like fast text decoding, fine hand control, and many simultaneous movement dimensions.
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Precision is pushing density as the workaround. Its human studies used a 1,024 electrode film on about 1.5 cm2 of cortex, and Mount Sinai described the system as designed for high resolution mapping of motor, speech, and cognitive activity. The core claim is that many tightly packed surface contacts, plus decoding software, can recover enough detail without needles entering cortex.
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Neuralink and Paradromics are pursuing the opposite bet. Neuralink places flexible threads into brain tissue to record from many neurons more directly, while Paradromics has positioned Connexus as a highest data rate system and reported first in human recording in June 2025, followed by a first human implant in July 2026. Those approaches are harder surgically, but they are built for maximum bandwidth.
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The market is already sorting into a ladder of invasiveness. Synchron goes through blood vessels and accepts lower signal capture for a simpler procedure. Precision sits between Synchron and intracortical systems, offering open skull access but no tissue penetration. That middle position only wins if it delivers a meaningfully better decoder than endovascular or legacy ECoG systems, while staying safer and more durable than penetrating implants.
The next phase of competition will be decided by chronic human performance, not lab elegance. If Precision can turn dense surface data into dependable speech and cursor control over long periods, it can define a clinically practical middle ground. If intracortical systems keep a clear edge on speed and precision, the field standard will move toward deeper implants despite the higher procedural burden.