Like Scott McCloud says, as a medium where one sense is responsible for conveying all of the senses, comics rely on comics to open the world past just the visual. But even the sense of sight is limited through panels on paper, because motion is something not able to be frozen in time.
Yet comics have conquered that battle with added visual elements.
And we have been given “motion lines,” drawn in varying degrees of complexity.
This concept has escaped the limitations of panels, however, and lends itself often to instructions of actions that require movement, such as signing for communication.
In these depictions, lines, circles, arrows, and even not fully present hands show the intended motion that is needed to speak with hands.
Sign language is not something that is typically easily communicated by words, yet many signs cannot be accurately shown with one static image. The motion lines provide clarity and direction for someone interested in learning this language.
What benefits comics does not only benefit comics, but shows itself in other areas like sign language and scuba diving signs.
McCloud, Scott. Understanding Comics: The Invisible Art. New York: HarperCollins, 1993. Print.