Complex sentence: A study by Gregg Recanzone demonstrates this by seeing if a monkey could distinguish between a stimulus of high and low frequency vibrations, delivered to the tip of a its finger at a fixed location.
Split into simpler sentences: A study by Gregg Recanzone demonstrates this by seeing if a monkey could distinguish between a stimulus of high and low frequency vibrations. Both high and low frequency vibrations were delivered to the tip of a monkey's finger at a fixed location.