[53] Sergio LE, Kalaska JF. Systematic changes in motor cortex cell activity with arm posture during directional isometric force generation[J]. J Neurophysiol, 2003, 89(1): 212-228.
[54] Sergio LE, Hamel-Paquet C, Kalaska JF. Motor cortex neural correlates of output kinematics and kinetics during isometric-force and arm-reaching tasks[J]. J Neurophysiol, 2005, 94(4): 2353-2378.
[55] Shen L, Alexander GE. Neural correlates of a spatial sensory-to-motor transformation in primary motor cortex[J]. J Neurophysiol, 1997, 77(3): 1171-1194.