1. A functional optical coherent imaging (fOCI) device comprising an active camera unit (ACU) connected to an image processing unit (IPU) for calculating a hemodynamic flow map using the coherence properties of a coherent and/or partially coherent light source at a selected body area of interest of a subject; a stimulation unit (STU) for applying an external or detecting an internal stimulation pattern of the subject; a central clock and processing unit (CCU), with interconnections to the ACU and the IPU for collecting the blood flow map from the IPU and the stimulation pattern from the STU; in a timely synchronized manner; a post-processing unit (statistical analysis unit, SAU) suitable for statistical analysis of the received synchronized data from the CCU, configured to calculate a functional OCI (fOCI) map which represents a statistical confidence map of the hemodynamic response caused by the stimulation pattern; a screen to display the fOCI map.