Brain electrical grids and computing grids: A perfect match Mike X Cohen
description
Transcript of Brain electrical grids and computing grids: A perfect match Mike X Cohen
Brain electrical grids and computing grids:A perfect match
Mike X Cohen
The brain
GREEN
The behavior
Brain electrical activity
Cutting-edge EEG recording technology
256 electrodes1 kHz sampling
~5 GB/hour
Mag
nitu
de
(a)
Phas
e an
gle
(q)
real
*real
imag.m
q
a
Data dimension explosion
21437174
Beamforming for source localization
Data dimensions:
1) Space (spherical or 3D)2) Time3) Frequency (power vs. phase)4) Experiment condition5) Connectivity6) Subjects
Why we need computational power
Example of typical results
It gets worse:Anatomical connectivity is also important.
Voxels
Voxe
ls
EEG connectivity matrix
Voxels
Voxe
ls
DTI connectivity matrix
EEG single-trial power MNE conflict effect Seeded tractography
Linking anatomical and functional connectivity
The problem:
Brain data analyses involve many repeated transformations of very large
data matrices.
Standard computers cannot handle these analyses without annoying interventions.
The solution:
A scalable, dynamic, and remotely accessible grid of processors.
*Note: open to collaborations starting in 2013!