hand. Yamamoto and Kitazawa [Yamamoto, S., Kitazawa, S., 2001b. Sensation at the tips of
invisible tools. Nat. Neurosci. 4, 979–980] previously showed that the judgment of the
temporal order of two successive stimuli, delivered to the tips of sticks held in each hand,
was dramatically altered by crossing the sticks without changing the positions of the hands.
This provided evidence for the referral of tactile signals to the tip of a tool in hand. In this …