Figure 1.

Experiment setup and methods. (A) Subjects performed a target acquisition task using a virtual hand controlled either by flex sensors or neural decoder output. (B) A novel manipulandum was used to separate finger movements into three active configurations: index only; middle, ring, and pinky (MRP); or all fingers moving together. An unrestrictive stanchion (not pictured) that does not restrict finger movements was also used for sensory context experiments. (C,D) Array implants for Monkeys W and N. Only signals from the motor arrays were used in this study. *Monkey N was implanted with a split array, however 64 channels (darkened) were inactive for the study period.