Neuralink's fully implanted wireless brain-computer interface device featuring 1,024 electrodes on 64 flexible polymer threads, an integrated ASIC for signal processing, and inductive wireless charging and data transmission.

What category does N1 Implant belong to in BCI?

N1 Implant is a Devices concept in brain-computer interface science.

N1 Implant — BCI Glossary

The N1 is Neuralink's first-generation implantable BCI device, designed as a fully wireless, cosmetically invisible intracortical neural interface. It represents a significant engineering advance over the Utah Array, addressing the key limitations of percutaneous connectors, low electrode count, and rigid electrode materials. The N1 received FDA IDE approval and began its first-in-human PRIME study in January 2024.

Hardware Specifications

Electrodes: 1,024 electrode sites distributed across 64 flexible polymer threads (16 electrodes per thread)
Thread dimensions: Approximately 5 micrometers wide (thinner than a human hair), 20-50 mm long
Implant body: Hermetically sealed titanium and glass housing (approximately 23 mm diameter, 8 mm thick) that replaces a circular section of skull
ASIC: Custom neural signal processing chip that amplifies, digitizes, and compresses signals from all 1,024 channels
Power: Rechargeable battery with wireless inductive charging through the scalp (similar to wireless phone charging)
Data transmission: Wireless Bluetooth-based data link to an external receiver/decoder

Robotic Insertion

Neuralink developed a custom surgical robot (R1) to insert the flexible polymer threads into cortex. The threads are too flexible to be inserted by hand — the robot uses a tungsten needle to carry each thread and insert it to a precise depth while avoiding surface blood vessels detected by computer vision. The entire 64-thread insertion takes approximately 15-25 minutes.

PRIME Study

The PRIME (Precise Robotically Implanted Brain-Computer Interface) study is Neuralink's IDE-authorized first-in-human clinical trial (NCT05829199). The first participant, Noland Arbaugh (29-year-old with C4/C5 spinal cord injury), received the N1 in January 2024. He demonstrated high-performance cursor control for gaming, web browsing, and social media interaction. Subsequent participants were implanted in 2024-2025.

Key Advances Over Utah Array

| Feature | N1 | Utah Array | |---------|-----|------------| | Channels | 1,024 | 96 | | Connector | Wireless | Percutaneous pedestal | | Electrode material | Flexible polymer | Rigid silicon | | Charging | Wireless inductive | N/A (wired power) | | Visibility | Flush with skull, under skin | Visible pedestal | | Insertion | Robotic | Pneumatic (manual) |

Signal Quality

Early PRIME study reports indicated some electrode thread retraction (threads pulling back from cortex), potentially reducing the number of functional channels. Despite this, the remaining channels provided sufficient signal for high-performance cursor control. Thread retraction and long-term stability remain active areas of engineering optimization.