Provided are: a system and a method for examining a brain function from brain activity data; a brain state estimation device; a computer program; and a brain state estimation method.　Provided is a system including a function of classifying the brain activity data on a subject fluctuating in a space including a time axis, by using a time-series model in which learning data including a large number of solutions related to a brain function test is learned. This system may include a function of estimating, from the brain activity data, the spatial distribution, including the time axis, of a signal source indicated by the activity data, by using a model in which solutions related to a large number of inputs and outputs including the activity region and pattern of the brain, and may include a function of estimating the brain state of the subject, by using a model in which a spatial distribution, including the time axis, of the estimated signal source and the case are learned.
BRAIN STATE ESTIMATION DEVICE, COMPUTER PROGRAM, BRAIN STATE ESTIMATION METHOD, AND SYSTEM AND METHOD FOR EXAMINING BRAIN FUNCTION