PowerPoint Presentation - Using AFNI Interactively

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Script for Deconvolution - 6a

3dDeconvolve -input {$subj}_all_runs+orig -num_stimts 4 \

-stim_file 1 ../misc_files/all_stims.1D'[0]' -stim_label 1 ToolMov \

-stim_minlag 1 0 -stim_maxlag 1 14 -stim_nptr 1 2 \

-stim_file 2 ../misc_files/all_stims.1D'[1]' -stim_label 2 HumanMov\

-stim_minlag 2 0 -stim_maxlag 2 14 -stim_nptr 2 2 \

-stim_file 3 ../misc_files/all_stims.1D'[2]' -stim_label 3 ToolPnt \

-stim_minlag 3 0 -stim_maxlag 3 14 -stim_nptr 3 2 \

-stim_file 4 ../misc_files/all_stims.1D'[3]' -stim_label 4 HumanPnt\

-stim_minlag 4 0 -stim_maxlag 4 14 -stim_nptr 4 2 \

• Input dataset is the catenated thing created earlier

• There are 4 time series models

• All stimuli time series are in one file with 4 columns: ../misc_files/all_stims.1D

• The selectors like ‘[2]’ pick out a particular column

• Each stimulus and HRF will be sampled at TR/2 = 1.0 s, due to the use of -stim_nptr k 2 for each k

• Lag from 0 to 14 is about right for hemodynamic response to a brief stimulus