A dummy instrument for use in a simulator, the instrument comprising a
control body (101) with user manipulatable angulation control (105), an
insertion tube (102) and an umbilical (103) extending from the control
body. In a real instrument corresponding to the one being simulated, at
least one angulation cable would extend from the user manipulatable
controls to the tip of the insertion tube such that movement of the
angulation control changes the angulation of the tip. In the dummy
medical instrument the angulation cable extends from the user
manipulatable angulation control, and down the umbilical. The umbilical
is releasably attached to a main unit (105). A motor (20,21) within the
instrument at the distal end of the umbilical to applies a variable force
to the cable. A position detector (30,31) within the instrument detects
the angular position of the angulation control.