Distributed modular implants (untethered mote networks)

A scaling architecture that replaces one large, heavily cabled array with many small, independent, wirelessly powered and read modules tiled across the brain. Each module handles a few channels locally and communicates without physical wires, so channel count grows by adding units rather than by widening a single bottlenecked cable. Ultrasonic backscatter motes (neural dust) and free-floating wireless microchips are prominent research embodiments.

The appeal is that it sidesteps the cabling, connector, and single-point-of-failure limits of monolithic arrays and spreads heat over a larger area. The unsolved problems are equally real: powering and reading hundreds to thousands of untethered nodes without exceeding the thermal budget, localising each node, keeping clocks and time-stamps aligned across nodes, and validating the whole swarm chronically. It is a promising but still largely demonstrative path to whole-cortex bandwidth.