Figure 1.

Experiment paradigm. A, Setup for the delivery of visual, tactile, and auditory stimuli. The monkey was seated in a primate chair facing a monitor and two speakers. Speakers, air flow lines, and juice spout were placed such that they did not block the view of the monitor. B, Frontal view of the Loc-line hoses for tactile stimulation locations (green). All hoses were placed orthogonal to the surface of the skin at ∼2 cm distance and directed toward nonsensitive areas (i.e., away from the eyes and ears). C, Task design. The monkey fixates a target cue on the monitor that is followed by a visual, tactile, or auditory stimulus drawn at random from a stimulus set. Stimulus delivery is followed by a small juice reward.