“…Feasible responses are not necessarily easy to find, however, when the person's motor condition presents with extensive paralysis or massive spasticity. One way to deal with these conditions is to select marginal and atypical expressions, such as eyelid, lip, and forehead movements, as responses that the person may more easily control (Lancioni, Singh, O'Reilly, & Oliva, 2005;. Another approach may be to identify variations within any conventional motor scheme that might still be available and use these variations as different responses (Lancioni, Olivetti Belardinelli, Stasolla, Singh, O'Reilly, Sigafoos, et al, 2008).…”