Alternatively oradditionally, sensory organs on the body stem, especially the head,might control the placement of the forepaw in space in a fashionsimilar to the end-point trajectory control which occurs in target-directed reaching (Morasso, 1981; Alstermark et al., 1993; Martinet al., 1995; Graham et al., 2003). A good candidate for this type ofsensor are the mystacial vibrissae in small-sized mammals