To visualize the time course:
1. You can
create an ROI in AFNI
2. Extract the time series (3dmaskave) from your full preprocessed data (usually the all_runs)
3. Plot the time series compared to your design (1dplot)
You can also set the underlay to your functional dataset, click on an active voxel, and bring up the graph viewer, and under one of the dropdown menus you can plot the ideal for a condition on top of the graph of the voxel activity. Let me know if you have followup questions!
Some tidbits of this in one of
Andy's YouTube videos.