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A representative single‐trial response filtered to 0.1–130 Hz (upper traces) and to 40–70 Hz (lower traces) of optically pumped magnetometer (OPM), SQUID magnetometer (mSQUID), and planar SQUID gradiometer (gSQUID) sensor with the largest gamma‐band response (Subject 6). The dashed vertical lines indicate the onset and offset of the stimulus. Responses are from a trial without a change in the grating contraction velocity
