1. A software routine stored on a non-transitory computer readable medium having thereon a video application to facilitate execution of a video presentation on a video screen, comprising: an audiovisual application presenting to a user an interactive presentation on the video screen; and a brain activation routine injected into the interactive presentation to challenge and change dissymmetry of hemispheric brain activity at least partially caused by the interactive presentation by: (1) producing a prominent object on the video screen tending to fixate the user's gaze; (2) while the prominent object remains on the video screen, stimulating a predefined neuro-motor activity of a user and having a user provide bilateral user-input as a response to a visual event produced on the video screen, in which: a. the visual event is at least one of (i) a moving visual object and (ii) a stationary visual object produced on the video screen in a different location from the prominent object to engage the user's peripheral vision; and b. the predefined neuro-motor activity is a bilateral user-input responsive to a predicted event on the video screen of the said at least one of (i) a moving visual object and (ii) a stationary visual object relative to another visual element on the video screen; (3) recording and evaluating a time differential between the predicted event and the bilateral user-input responsive to that predicted event in step (2) and any perceived user performance change as an indicator of the dissymmetry of hemispheric brain activity; and (4) using the indicator from (3) to establish parameters for a next repetitive occurrence of (1), (2), and (3) based on changes in performance of the user during a previous one or more evaluations of (3) to thereby treat brain dissymmetry; the parameters including at least one of: a baseline; a screen feature from which moving features split off to stimulate bilateral motor response; routine injection timing; routine duration; and different kinds of stimulus including color, saccadic events, movement, sound, pursuit or other activity to promote brain symmetry; wherein the step of using the indicator to establish parameters include at least one of: creating a new base line as parameters for future run directions; generating new sequences to affect stimulation of bilateral brain activation based upon performance markers of previous results; generating screen features to stimulate bilateral response and adjusting future injected routines based upon user input following the moving features; resetting a future injected routine to challenge dissymmetry of hemispheric brain activity based upon bilateral user-input accuracy in performing stimulated neuro-motor activity; adjusting content within the future injected routines based upon somatosensory feedback data; establishing a reset criteria; establishing random sequence changes in future injected routines; adjust the ability level for future injected routines; resetting subsequent interrupts of the audiovisual presentation for an injected routine; or generating a length of an uninterrupted audiovisual presentation prior to the next injected adjusted routine.