Information Analysis on Neural Tuning in Dorsal Premotor Cortex for Reaching and Grasping
Figure 2
The tuning activities of four example neurons from both monkeys during the Reaching and the Grasping tasks. The -axis represents the times (in seconds) from the rest state (about 0.4-0.5 s) to the movement state (about 1.4–1.7 s). The -axis represents the firing rate (in Hz). The vertical line in each panel represents the time of Light ON, which is defined as 0 s. Each row shows the variation of the same neuron’s firing rates in the two tasks (left: the Reaching task; right: the Grasping task). Neurons A and B are from the first session of B03, and Neurons C and D are from the third session of B04. The four different colors in one plot represent four different actions of a task. Specifically, in the Reaching task, the red color indicates reaching to the direction of upper-left corner (D1), the green color indicates reaching to the direction of upper-right corner (D2), the blue color indicates reaching to the direction of lower-left corner (D3), and the light blue color indicates reaching to the direction of lower-right corner (D4). In the Grasping task, the red color indicates grasping the cylinder, the green color indicates grasping the plate, the blue color indicates grasping the ring, and the light blue color indicates grasping the cone.
