Now we can see neurons firing (super-slow-motion invented)

New Scientist - 10.28.09 (by Colin Barras)

Slow motion just got a whole lot slower, with a camera sensor able to film action at 1 million frames per second.

The black and white device is quick enough to capture impulses hurtling through firing nerve cells, and its resolution is good enough to film the microsecond-long pulse-like nerve signals that speed through networks of neurons at up to 180 kilometres per hour.

Capturing frames that last one-millionth of a second requires great sensitivity to light, as well as precise timing. The device uses an array of single-photon detectors, or SPADs, each hooked up to a tiny stopwatch. The stopwatch records when the SPAD is hit by an incoming photon, with an accuracy of around 100 picoseconds.

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