41 37

14+23

. 41 36

14+23

.

Exact Estimate

300 msec

response

-1500 -1000 -500 0 500 1000 1500 2000 2500 3000-10

-5

0

5FZ

-1500 -1000 -500 0 500 1000 1500 2000 2500 3000-4

-2

0

2

4

6CZ

-1500 -1000 -500 0 500 1000 1500 2000 2500 3000-2

0

2

4

6PZ

odorproblem answer

Vol

tsV

olts

Vol

ts

msec

http://www.biosemi.com/pics/erp_application.htm

Rapid TransitionSlow Transition

Odor evoked activity at 800msec

Slice Thicknesse.g., 6 mm

Number of Slicese.g., 10

SAGITTAL SLICE IN-PLANE SLICE

Field of View (FOV)e.g., 19.2 cm

VOXEL(Volumetric Pixel)

3 mm

3 mm6 mm

Slice Terminology

Matrix Sizee.g., 64 x 64

In-plane resolutione.g., 192 mm / 64

= 3 mm

From fMRI for Dummys

MRI studies brain anatomy.Functional MRI (fMRI) studies brain function.

MRI vs. fMRI

From fMRI for Dummys

Temporal precision

Spa

tial p

reci

sion

perfect

fMRI

EEGERP

PET

The Human Connectome Project

So how do brains really work?

Hydraulic

Clock

Dynamo

Telephone

Analog Computer

Digital Computer

Hologram

Digital Computer…