DIPFIT and model co-registration Task 1

Co-register electrodes with model

Task 2 Task 3

Autofit equivalent dipoles Fine fit options

Task 4

Headplot()

co-registration Exercise...

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 1

Finding dipole locations

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 2

Co-register to model

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 3

Co-register to model, cont'd

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 4

Perform translation of electrode positions

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 5

Warp electrodes to standard montage

Check to see that electrodes are correctly matched EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 6

Check coregistration with model

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 7

Confirm new co-registration

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 8

DIPFIT and model co-registration Task 1

Co-register electrodes with model

Task 2 Task 3

Autofit equivalent dipoles Fine fit options

Task 4

Headplot()

co-registration Exercise...

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 9

Autofit equivalent dipoles

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 10

Plot dipoles

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 11

Scroll through dipoles

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 12

DIPFIT and model co-registration Task 1

Co-register electrodes with model

Task 2 Task 3

Autofit equivalent dipoles Fine fit options

Task 4

Headplot()

co-registration Exercise...

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 13

Fine fit options in DIPFIT

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 14

Fine fit menu

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 15

Bilateral

Bilateral dipoles

Ambiguous EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 16

DIPFIT and model co-registration Task 1

Co-register electrodes with model

Task 2 Task 3

Autofit equivalent dipoles Fine fit options

Task 4

Headplot()

co-registration Exercise...

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 17

Plot scalp maps in 3D

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 18

Headplot co-registration

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 19

Rotate electrodes to fit model -pi/2

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 20

Confirm headplot co-registration

EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 21

Exercise...

• Load

'.../data/faces_4.set'

• Plot a selection of dipoles on a single MRI • Go to

Fine fit

menu • Try a bilateral dipole fit on any IC • What happens to the r.v.?

• Coregister either DIPFIT or

headplot()

model EEGLAB Workshop III, Nov. 15-18, 2006, Singapore: Julie Onton – DIPFIT and model co-registration 22