Summary of results
| Dopamine levels when initiating a new bout of activity | Dopamine reflecting initiation vigor and exerted effort | |||
|---|---|---|---|---|
| NAcc core | NAcc shell | NAcc core | NAcc shell | |
| Active lever pressing bout | No change | Elevation prior to initiation | Reflect vigor and effort | No encoding |
| Head entry bout | Decrease after initiation | No change | Reflect effort | No encoding |
| Inactive lever pressing bout | No change | No change | No encoding | No encoding |