EEGlocations | R Documentation |
Data frame of class sensorlocs
containing 346 sensor locations
corresponding to the 10-5 electrode system for EEG.
Data frame of class sensorlocs
containing 346 sensor locations
corresponding to the 10-5 electrode system for EEG.
EEGlocations
EEGlocations
A data frame with 356 rows and 8 columns:
(factor
) electrode label according to the 10-5 system,
e.g., "AF1", "P3", etc.
(numeric
) Cartesian x-axis (left-to-right) value
(numeric
) Cartesian y-axis (back-to-front) value
(numeric
) Cartesian z-axis (bottom-to-top) value
(numeric
) x-axis value of orthogonal projection onto 2D
plane
(numeric
) y-axis value of orthogonal projection onto 2D
plane
(numeric
) angle between 3D z-axis and x/y plane
(numeric
) angle between x- and y-axes
A data frame with 356 rows and 8 columns:
(factor
) electrode label according to the 10-5 system, e.g., "AF1", "P3", etc.
(numeric
) Cartesian x-axis (left-to-right) value
(numeric
) Cartesian y-axis (back-to-front) value
(numeric
) Cartesian z-axis (bottom-to-top) value
(numeric
) x-axis value of orthogonal projection onto 2D plane
(numeric
) y-axis value of orthogonal projection onto 2D plane
(numeric
) angle between 3D z-axis and x/y plane
(numeric
) angle between x- and y-axes
A sensorlocs
object is a data.frame
containing
sensor locations that can be used in further analyses or display. In order to
match R's plotting functions, the coordinate system used in eegr
models the head as a perfect sphere with a radius of 1 and the origin in the
middle of the head (0,0,0).
Within this system, Cartesian coordinates are defined along the following axes:
the X-axis points from the left (-) to right (+) pre-auricular points, i.e., positive values of x refer to sensors over the right hemisphere, whereas negative values of x refer to sensors over the left hemisphere.
the Y-axis points from the back of the head (inion, -) to the front (nasion, +), i.e., positive values of y refer to sensors over the anterior part of the brain, whereas negative values of y refer to sensors over the posterior part of the brain.
the Z-axis point from the bottom of the head (-) to the top (+) of body, i.e., positive values of z refer to sensors above the center of the head, whereas negative values of z refer to sensors below the center of the head.
Angular coordinates are defined as follows:
Theta is the angle angle between the Z-axis and the X/Y-plane; positive values indicate sensors over the right hemisphere; negative values over the left.
Phi is the angle between the X- and Y-axes, with positive values indicating counterclockwise rotation and negative values clockwise.
A sensorlocs
object is a data.frame
containing sensor locations that can
be used in further analyses or display. In order to match R's plotting functions,
the coordinate system used in eegr
models the head as a perfect sphere with a
radius of 1 and the origin in the middle of the head (0,0,0).
Within this system, Cartesian coordinates are defined along the following axes:
the X-axis points from the left (-) to right (+) pre-auricular points, i.e., positive values of x refer to sensors over the right hemisphere, whereas negative values of x refer to sensors over the left hemisphere.
the Y-axis points from the back of the head (inion, -) to the front (nasion, +), i.e., positive values of y refer to sensors over the anterior part of the brain, whereas negative values of y refer to sensors over the posterior part of the brain.
the Z-axis point from the bottom of the head (-) to the top (+) of body, i.e., positive values of z refer to sensors above the center of the head, whereas negative values of z refer to sensors below the center of the head.
Angular coordinates are defined as follows:
Theta is the angle angle between the Z-axis and the X/Y-plane; positive values indicate sensors over the right hemisphere; negative values over the left.
Phi is the angle between the X- and Y-axes, with positive values indicating counterclockwise rotation and negative values clockwise.
Geert van Boxtel, G.J.M.vanBoxtel@gmail.com
Geert van Boxtel <G.J.M.vanBoxtel@gmail.com>
Oostenveld, R., Praamstra, P., 2001. The five percent electrode system for high-resolution EEG and ERP measurements. Clin. Neurophysiol. 112, 713-719.
Oostenveld, R., Praamstra, P., 2001. The five percent electrode system for high-resolution EEG and ERP measurements. Clin. Neurophysiol. 112, 713-719.
data(EEGlocations)
data(EEGlocations)
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