**1st Level Analysis 2: Basis functions, parametric modulation and correlated regressors**

You can download a copy of Gayaneh and Oriel's talks here: BasisFunctions.ppt ParametricMod.ppt

**Web Resources**

Below is a list of web resources used in the talk

**Basis Functions**

Fourier Series Tutorial

Animated illustration of the convolution of two functions

The convolution theorem and its applications

A link to all the chapters of the Human Brain Function

Rik's SPM GLM powperpoint from our imaging wiki SPM.ppt

**Correlated regressors**

Design Magic toolbox- Multicollinearity assessment for fMRI for SPM

**References**

**Basis Functions**

Human Brain Function, Academic press, 2nd edition, 2003 (Chapter 10)

Functional Magnetic Resonance Imaging (Scott A Huttel et al.)

R.N.A. Henson, M.D. Rugg, and K.J. Friston. (2001) The choice of basis functions in event-related fMRI. **NeuroImage**, 13(6):149, Note: Supplement 1

PDF of paper

Dale.pdf Selective Averaging of Rapidly Presented Individual Trials Using fMRI

Josephs.pdf Event-Related fMRI

Friston.pdf Event-Related fMRI: Characterizing Differential Responses

Friston2.pdf Nonlinear Event-Related Responses in fMRI

**Parametric regressors**

Characterizing stimulus-response function using nonlinear regressors in parametric fMRI experimentsâ€™, Buchel et al, **Neuroimage**, 1998

Using parametric regressors to disentangle properties of multi-feature processesâ€™, Wood et al, Behavioural and Brain Functions, 2008 doi:10.1186/1744-9081-4-38

Link to paper