PMID-12522173[0] Systematic changes in motor cortex cell activity with arm posture during directional isometric force generation.
- isometric joystick was positioned at 5-9 different locations in a plane in the monkey's workspace.
- discharge of all cells varied with position and force.
- Cell directional tuning tended to shift systematically with hand location even though the direction of static force output at the hand remained constant
- would this be true if the forces were directed in muscle coordinates?
- "provides further evidence that MI contributes to the transformation between extrinsic and intrinsic representations of motor output during isometric force production."
____References____
|
[0] Sergio LE, Kalaska JF, Systematic changes in motor cortex cell activity with arm posture during directional isometric force generation.J Neurophysiol 89:1, 212-28 (2003 Jan)