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Fig. 23.2 Pupil feeling the lines on the reverse side of the sheet (Source: collection of the tactile
cartography group-UNESP; photo: Juliasz (2009))
23.3 Bimanual Coordination and Graphics Memory
In the topic Discapacidad visual y destrezas manipulativas (Rubayo et al. 2007 ) are
suggested activities and materials that aid in tactile stimulation. Many of the
authors' suggestions were observed at the Special School, such as how to make
balls of paper, paint with your fingers using open molds, classify and sort a mixture
of small objects, differentiate textures, recognize miniatures and figures in high
relief, recognize geometric figures, differentiate sizes of objects, etc.
The authors' suggestions are to increase the sensitivity of the fingertips, the
pressure when closing and opening one's hands and fingers and bimanual coordi-
nation. The hand actions undergo a proper sequence of motions, and for Rubayo
et al. ( 2007 ) the principles of bimanual coordination are:
￿ Handle delicate and fragile objects differently from durable ones;
￿ Consider that the neurological maturity in itself is not sufficient for the develop-
ment of manual skills, because opportunities are necessary for the hands to move
in various situations;
￿ Know that each hand has an asymmetric function, and one is dominant and is
more commonly used to the handle objects and in other activities and the other
acts as a helper;
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