brede_loc - Overview of 'Loc' structure functions
Functions:
brede_loc_asymmetry - Measure the asymmetry among a set
brede_loc_coord2url - URL for coordinate
brede_loc_dist_hausdorff - Distance between two point sets
brede_loc_hulllevel - Hull level for 'coord' fields
brede_loc_label - Label locations
brede_loc_loc2coord - Convert Loc to coordinate matrix
brede_loc_loc2html - Generate HTML for location structure
brede_loc_loc2html_stat - Generate HTML with statistics
brede_loc_loc2loc - Regularize location structure
brede_loc_loc2mat - Convert to matrix, ie, 'mat' structure
brede_loc_loc2vol - Voxelize locations
brede_loc_mat2loc - Convert a matrix to a location
brede_loc_mean - Mean of 'coord' fields over locations
brede_loc_median - Median of 'coord' fields
brede_loc_query - Find nearest locations
brede_loc_select - Select structure element
brede_loc_symmetrize - Mirror the locations.
brede_loc_xform - Transform between space
brede_ui_loc - Enter a 'loc' structure
brede_ui_loc_init - Initialization for brede_ui_loc
brede_bib_bib2loc - Convert 'bib' to 'loc' structure
brede_exp_exp2loc - Convert 'exp' to 'bib' structure
brede_read_csv2loc - Read comma separated values
brede_ta3_loc - Plot 'loc' in Corner Cube
brede_vol_vol2loc - Convert 'vol'to 'loc' structure
brede_write_loc - Write 'loc' to text file
The 'Loc' structure contains an activation foci. The most
important element in this structure is probably the 'coord'
field which should be a vector of size three containing
TALAIRACH COORDINATES represented in meters.
Location can be typed in via the brede_ui_loc functions. This
function controls a graphical user interface that DISPLAYs
some of the information in the 'loc' structure and where the
information can be EDITed.
Note: The Talairach coordinates are normally redundantly
represented in the several fields of the 'loc' structure: 'x',
'y', 'z', 'coord', 'xReported', 'yReported', 'zReported'. Most
of the functions work on the 'coord' field. However, during
entering of coordinates via the brede_ui_loc function the
coordinates are usually first written to the 'xReported',
'yReported' and 'zReported' fields and then converted to the
other fields depending on the 'BrainTemplate'. This is
primarily to correct for the difference between the MNI and
the original Talairach atlas. The function that reads
information from comma separated fields (brede_read_csv2loc)
can read information in to both the 'coord' field and the
'?Reported' fields depending on how it is called.
'Loc' structure:
L.type = 'loc' Structure identifier
L.activatedSubjects Number of subjects where the activation
occured
L.brodmann Brodmann area
L.coord x, y and z Talairach coordinates
L.coordReported x, y and z stereotactic coordinates the
way they are reported, eg, in MNI-space
or Talairach space
L.functionalArea Label for the functional area, eg,
"Supplementary motor area"
L.fValue Fisher's F-statistics
L.lobarAnatomy Lobar Anatomy, the brain structure/brain
region
L.numberOfVoxels Number of voxels in the region
L.percentChange Percent signal change
L.pValue P-value for the location
L.pValueCluster Statistical P-value for cluster
L.pValueCorrect Statistical P-value
L.pValueUncorrect Statistical P-value uncorrected for
multiple comparisons.
L.regionId Region identifier. Integer from 1 to the
number of regions in the image
L.tValue Statistical Student's t value
L.value A magnitude/"value" of the location
L.valueCov Coeffiecient of variance for 'value'
L.valueMin Minimum value
L.valueMax Maximum value
L.valueStd Standard deviation for 'value'
L.volume (Mean) activated volume for cluster in
cubic meters (m^3)
L.volumeStd Standard deviation on the activated
volume in cubic meters (m^3)
L.wobib WOBIB identifier if the location belongs
to a specific paper in the Brede database
L.woexp WOEXP identifier if the location belongs
to a specific experiment
L.woroi WOROI identifier if the location refers
to a specified region of interest
recorded in the Brede database
L.zScore Statistical Z-score for the location
See also BREDE, BREDE_EXP, BREDE_MAT, BREDE_READ, BREDE_STR,
BREDE_VOL, BREDE_LOC_ASYMMETRY, BREDE_LOC_COORD2URL,
BREDE_LOC_DIST_HAUSDORFF, BREDE_LOC_HULLLEVEL,
BREDE_LOC_LABEL, BREDE_LOC_LOC2COORD,
BREDE_LOC_LOC2HTML, BREDE_LOC_LOC2HTML_STAT,
BREDE_LOC_LOC2LOC, BREDE_LOC_LOC2MAT,
BREDE_LOC_LOC2VOL, BREDE_LOC_MAT2LOC, BREDE_LOC_MEAN,
BREDE_LOC_MEDIAN, BREDE_LOC_SYMMETRIZE,
BREDE_LOC_XFORM, BREDE_READ_CSV2LOC, BREDE_UI_LOC,
BREDE_UI_LOC_INIT, BREDE_VOL_VOL2LOC,
BREDE_WRITE_LOC.
$Id: brede_loc.m,v 1.21 2007/06/15 17:12:43 fn Exp $