Perceptual-motor coordination in an endoscopic surgery simulation

Background: This study examined perceptual-motor coordination with an appar atus that simulated a situation representative of endoscopic surgery. Methods: Participants were trained with one arrangement of the apparatus, t hen tested with an alternative arrangement in which either the positions of the camera, the surgeon, or the objects in the surgical field were altered . Results: Results showed that changes of either the camera's position or the surgeon's position disrupted performance. However, when the camera and sur geon positions were changed together, skilled performance was maintained. Conclusions: This suggests that skill depends on a consistent mapping betwe en the virtual hands and eyes, but not on the particular visual or motor or ientations. The results suggest that movements of the camera during surgery can disrupt coordinated action. Also, in the design of training simulators , the mapping between camera and instruments may be more important than the static appearance of the displays or the topology of the movements.