The BCI Wars: How Neuralink, Synchron, and Precision Are Hacking the Human Brain

The human brain is nature’s ultimate supercomputer, but its I/O ports are tragically outdated. We think at the speed of synapses, yet we are forced to communicate with machines by mashing our meat-sticks against plastic keys. The bandwidth bottleneck is infuriating.

Before you read: We recently covered non-invasive neural interfaces like the EMG wristband in Meta Orion and the Death of the Headset. This article explores the next, far more invasive step: putting the hardware directly inside your skull.

Table of contents

• The Bottleneck of Bone
• Neuralink: The Brute Force Robot
• Synchron: The Trojan Horse
• Precision Neuroscience: The Saran Wrap Approach
• Did you know?
• The Reality of Wetware
• Sources

The Bottleneck of Bone

For decades, the standard for reading brain activity without surgery was the EEG cap. It is non-invasive, safe, and completely terrible for high-fidelity data. Trying to read individual neuron spikes through the skull and scalp is like trying to listen to a specific violin during a symphony while standing outside the concert hall in a hurricane.

If you want to actually control a computer with your thoughts at high speeds, you have to bypass the bone. You have to go inside. And right now, three companies are taking three wildly different approaches to getting silicon into our wetware.

Neuralink: The Brute Force Robot

Elon Musk’s Neuralink took the most direct, aggressive route. Their N1 implant boasts 1,024 electrodes distributed across 64 flexible threads. The problem? You cannot implant this by hand. Human surgeons are incredibly skilled, but asking them to dodge a pulsing blood vessel with a polymer thread thinner than a red blood cell is pushing it. It’s like trying to solder a motherboard while riding a mechanical bull.

So, Neuralink built the R1 surgical robot to do the sewing. Early human trials have been undeniably impressive—the first patient, Noland Arbaugh, was playing Mario Kart and chess with his mind. But biology hates foreign objects. Shortly after surgery, some threads retracted from Arbaugh’s brain tissue, forcing Neuralink to tweak their algorithms to compensate for the lost signals. The brain is essentially a salty, corrosive jelly. Hardware degrades.

Synchron: The Trojan Horse

If Neuralink is a home invasion, Synchron is sneaking in through the plumbing. I honestly think this is the most elegant engineering solution in the entire BCI space.

Instead of cutting open the skull, Synchron uses a device called the Stentrode. It is delivered through the jugular vein in the neck and pushed up into a blood vessel sitting right over the motor cortex. It expands like a standard heart stent, pressing its 16 electrodes against the vessel walls to read the brain waves firing right next door.

It only has 16 channels compared to Neuralink’s 1,024. But here is the thing: nobody has to crack your skull open with a bone saw. Synchron has already implanted multiple human patients, allowing paralyzed individuals to text, email, and browse the web. When you are locked in your own body, a 16-channel connection to the outside world is a miracle, not a compromise.

Precision Neuroscience: The Saran Wrap Approach

Then there is Precision Neuroscience, co-founded by a former Neuralink executive. They looked at the two extremes and found a middle ground. Their Layer 7 Cortical Interface is a micro-electrode array packed with 1,024 channels on a film that is one-fifth the thickness of a human hair.

Surgeons cut a tiny, millimeter-thin slit in the skull and slip the film in like a piece of Saran Wrap, letting it drape gently over the surface of the brain. It doesn’t pierce the tissue at all. If it needs to come out, you just slide it back out. It’s high bandwidth without the tissue scarring.

Did you know?

• No pain receptors: Brain tissue itself has no pain receptors. Once a surgeon gets past the skull and the meninges (the protective layers), you can’t actually feel a robot sewing wires into your cortex.
• Heart attack tech: The foundational idea for Synchron’s Stentrode came from the stents used in cardiology to keep blocked arteries open—repurposing decades of proven vascular delivery methods for neurosurgery.

The Reality of Wetware

We are entering an era where our thoughts are becoming readable data. But let’s not get ahead of ourselves. These companies are currently focused entirely on restoring function to people with severe paralysis or ALS. The idea of consumer BCIs—where a healthy 30-year-old dev gets an implant to code faster—is decades away.

The FDA is notoriously strict about brain implants, and for good reason. What happens when the company that made your brain implant goes bankrupt? What happens when the proprietary Bluetooth protocol connecting your motor cortex to your iPhone gets deprecated? We complain about Apple dropping support for old iPads; imagine your skull hardware becoming legacy tech.

Sources

• FDA: Investigational Device Exemption (IDE) guidelines for Brain-Computer Interfaces
• Synchron Clinical Trials: The COMMAND Trial results (2024)
• Neuralink: PRIME Study early performance updates
• Precision Neuroscience: Layer 7 Cortical Interface specifications