The responses in impulses/second of 6 cells recorded in the macaque cortex in visual areas V1 and V2 to a series of contrasts of drifting sinusoidal gratings of optimal location, orientation, size and spatial frequency.
data(CorticalCells)A data frame with 42 observations on the following 7 variables.
Contrastnumeric vector of the Michelson contrast of the grating
Responsenumeric vector of the mean response of the cell in impulse/second (action potentials)
SEMnumeric vector of the standard error of the mean of the Response
Nnumeric vector of the number of responses recorded
Typefactor with levels CX SM corresponding to the cell type classification, complex or simple
Areaa factor with levels V1 V2 corresponding to the cortical area in which the cell was recorded
Cella factor with levels a, ..., f as an identifier of the cell. The numbers, also, correspond to the panels of Figure 2 from the reference (see below) in which the data were published.
Extracellular recordings of cells from macaque visual cortical areas V1 and V2. Simple and complex cells were differentiated by whether or not the response rate, \(f_0\), was greater than the amplitude of modulation at the drift rate, \(f_1\). If \(f_1 > f_0\), the cell was classified as a simple cell and the value of \(f_1\) is reported; otherwise the cell is classified as a complex cell and the value of \(f_0\) is reported. In both cases, the units are in impulses/second.
Peirce, J. W. (2007). The potential importance of saturating and supersaturating contrast response functions in visual cortex. Journal of Vision, 7(6):13, 1--10, https://jov.arvojournals.org//7/6/13/.
data(CorticalCells)
lattice::xyplot(Response ~ Contrast | Cell, CorticalCells,
type = "b")
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