HRFKernel

class brainmass.HRFKernel(duration=Quantity(20., 's'))

Base class for hemodynamic response function (HRF) kernels.

A kernel is a closed-form function of time \(h(t)\) defining the hemodynamic impulse response convolved with neural activity to form the BOLD signal (see HRFBold). Subclasses implement __call__().

Parameters:

duration (brainunit.Quantity) – Temporal support of the kernel (how far out \(h(t)\) is evaluated when building a convolution grid). Default 20 * u.second.

Notes

Calling a kernel evaluates \(h(t)\) on a time grid. The grid may be a brainunit.Quantity (any time unit) or a plain array, which is interpreted as milliseconds. The returned \(h(t)\) is a dimensionless array.

See also

HRFBold

convolution BOLD observation that consumes a kernel.

__init__(duration=Quantity(20., 's'))