R: [Eeglablist] cortical surface reconstruction

Febo Cincotti febo.cincotti at uniroma1.it
Tue Mar 29 02:31:59 PST 2005

Dear Marcello,
As far as I understood the only information you have about the cortical mesh
is the vertex coordinates and the vertex normals. This is not sufficient for
a straightforward reconstruction of the mesh (unless you set up some fancy
triangulation algorithm, which is not necessarily re-creating the original
mesh; the result could suffer from topological errors, e.g. shortcuts
between sulci, very unsmooth portions, etc).
Unless this is *really* inconvenient, I would go in the direction of asking
more information to who provided you with the vertices. 
Hope it helps


Febo Cincotti
Fondazione Santa Lucia IRCCS
Via Ardeatina, 306
I-00179 Roma
Tel +39 06 5150 1466
Fax +39 06 5150 1465
email febo.cincotti at uniroma1.it

-----Messaggio originale-----
Da: eeglablist-bounces at sccn.ucsd.edu
[mailto:eeglablist-bounces at sccn.ucsd.edu] Per conto di Marcello Massimini
Inviato: martedì 29 marzo 2005 1:56
A: eeglab at sccn.ucsd.edu; Arnaud Delorme; eeglablist at sccn.ucsd.edu
Oggetto: [Eeglablist] cortical surface reconstruction


We have location of points describing the cortex (x,y,z coordinates). 
Along with this we also have normals orientation (direction components
x,y,z) in arbitary units. We are facing the problem of recreating the
cortical surface using this information. We know there are 7150 triangles
present in our data set but we dont know how to visualise them back in
matlab using the above two inputs (locations and
normals) .

Any help or suggestion will be appreciated.

Thanks very much,

Marcello Massimini MD, PhD
Research Associate
Dept. of Psychiatry
University of Wisconsin - Madison
Research Park Blvd.
Madison, 53719, WI
Ph. (608) 265-4460 


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