A man was paralyzed from his chest down after breaking his neck diving into an ocean wave. Although medicine cannot reverse his paralysis, research may have created technology that can change his circumstances. A university has developed a microchip that enables his brain to transmit signals to a computer and subsequently electrodes in his arm, triggering movement. Though not a panacea for paralysis, this neurological innovation gives hope to victims of paralysis for improved quality of life. Currently, the technology is stationary; however, they plan to design a portable version in several years.

In the context of the passage, which one of the following WOULD significantly change the author$$s meaning if substituted for panacea?