English: Performing Detection Task. A clip labeled ‘performing task’. Monkey S is performing the go/no-go optogenetic stimulation detection task on a touchpad as follows: On ‘Control Trials’ (Catch Trials), no vibration or optical stimulation takes place - the monkey was trained to report such a ‘null result’ by leaving his hand in contact with the pad>1.5 seconds. On Optical Trials, the laser is delivered directly to somatosensory cortex, with no physical vibration applied. Behaviorally, one sees the monkey reporting the percept by removing his hand quickly (>750 ms).