Does fMRIPrep’s motion variables: `trans_x`

`trans_y`

`trans_z`

`rot_x`

`rot_y`

`rot_z`

and the derivatives: `trans_x_derivative1`

`trans_y_derivative1`

`trans_z_derivative1`

`rot_x_derivative1`

`rot_y_derivative1`

`rot_z_derivative1`

are derived by

removing the **mean** and **linear trend** from each of the above variables and its derivates?

The `trans_*`

and `rot_*`

are the raw values retrieved from MCFLIRT, without detrending. The derivatives are just the discrete derivative, `dx[i] = x[i] - x[i-1]`

.

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