PMID-8817266[0]On the relations between single cell activity in the motor cortex and the direction and magnitude of three-dimensional static isometric force.
3D isometric joystick.
stepwise multiple linear regression.
direction of force is a signal especially prominent in the motor cortex.
the pure directional effect was 1.8 times more prevalent in the cells than in the muscles studied (!)
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[0] Taira M, Boline J, Smyrnis N, Georgopoulos AP, Ashe J, On the relations between single cell activity in the motor cortex and the direction and magnitude of three-dimensional static isometric force.Exp Brain Res 109:3, 367-76 (1996 Jun)