PMID-3411363[0] Primate motor cortex and free arm movements to visual targets in three-dimensional space. III. Positional gradients and population coding of movement direction from various movement origins.
- In comparison to the first experiment, where they showed that movement direction was encoded by single units within M1, here they varied the starting position of the movements.
- tonic discharge of many cells varied in and orderly fashion with the position at which the hand was actively maintained in space.
- however, cell activity changes were the same independent of movement onset and dependent on movement direction.
- similar but not that similar -- vary based on tonic firing rate. See figure 9.
____References____
[0] Kettner RE, Schwartz AB, Georgopoulos AP, Primate motor cortex and free arm movements to visual targets in three-dimensional space. III. Positional gradients and population coding of movement direction from various movement origins.J Neurosci 8:8, 2938-47 (1988 Aug) |
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