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The Basal Ganglia (Conscious Decisions and Movement (Experiment: Able to…
The Basal Ganglia
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Involved in the regulation of the vigour of the movement
- Selecting which movement to make is likely to be dependent on the primary motor cortex
responding to the reward value of a possible action
- cells responding more strongly to signals indicating that responding will produce larger/more certain rewards
- stimulating D1 receptors would produce the same behavioral effects that an increase in rewards does
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Parkinson's: capable of strong movements and able to move strongly to immediate signals sometimes BUT slow and weak spontaneous movements
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Important for spontaneous, self - initiated behaviours
- When told exactly to move: no activity in basal ganglia
- When allowed to choose its own starting time: high activity in basal ganglia
- critical for initiating an action but not when it is stimulus - guided (drawing VS tracing a line)
- self - intiated behaviors slower than stimulus - triggered ones
This is the reason why a person drawing a gun second would have an advantage as reaction to stimulus is faster than a spontaneous movement