How much power can an implant spend before it warms the brain by a degree? · Grey Matter

Measurements and models of a powered Utah array found that the surrounding tissue warms by about 0.029 °C for every milliwatt the device dissipates.

How much power can an implant spend before it warms the brain by a degree?

Measurements and models of a powered Utah array found that the surrounding tissue warms by about 0.029 °C for every milliwatt the device dissipates. With designers keeping the rise within about 1 °C, that leaves roughly 35 mW for everything inside the head, from amplifiers to the radio. The figure depends on the device's size and on blood flow around it, but it sets the order of magnitude: tens of milliwatts, which is why every added channel has to be cheaper in power than the last.