NeurolinkNeuralink’s 2019 non-peer reviewed whitepaper demonstrates two of their devices System A and System B implanted in rats which took electrophysiological recordings as they moved around freely. Digitized broadband signals were processed in real-time to identify action potentials, also referred to as spikes, using an online detection algorithm. Neuralink uses custom spike-detection software for filter out false positive spikes. Their threshold was set to >0.35 Hz to quantify the number of electrodes recording spiking units. The simultaneous recording from over 3000 inserted electrodes in a freely moving rat was reported. The placement of electrodes was successful 87% of the time in 19 rats. Neuralink did not demonstrate capabilities for modulating neural activity, but state that their device is designed to be capable of electrical stimulation on every channel.