Elon Musk's Neuralink implanted its first brain chip in a human's skull. Here's what we know about the surgery.

• Elon Musk said Neuralink successfully implanted its first brain chip in a human.
• The startup reportedly aims to implant the device in 11 people this year.
• Here's everything we know about the surgery that replaces a portion of your skull.

Elon Musk said his brain-chip startup implanted its device in its first human patient on Monday.

"Initial results show promising neuron spike detection," Musk wrote on X.