Patent ID: 8221330

Claim:
An apparatus for assessing physiological signal reactivity of a subject, the apparatus comprising: a first reception unit configured to receive a single continuous physiological signal from the subject; a calculation unit configured to construct, based only on a time series of a physiological signal obtained from the subject, a signal model for the physiological signal; a control unit configured to apply a single time reference to the time series corresponding to a stimulus supplied to the subject; a second reception unit configured to receive further signal data from the time series of the physiological signal, the further signal data being obtained from the subject subsequent to the time reference; a test unit configured to test, through employment of the signal model constructed from the physiological signal obtained at least partially prior to the single time reference and the further signal data obtained subsequent to the single time reference whether the signal model is a valid signal model for the physiological signal; and an indicator unit, responsive to the test unit, configured to indicate, whether reactivity is present in the physiological signal.