camera is present the pusher may be used to maintain the line of sight of the camera preferably the pusher motor is utilized to control both the telescopic and vertical movements of the telescopic rod optionally and preferably the movement and range of motion of the pusher are controllable by controlling the pusher motor preferably the control means is provided by the control unit and may for example include but is not limited to joystick dial button switch or the like means to control at least one or more preferably a plurality the pusher 39 s range of motions optionally the pusher motor is an electrical actuator motor activated by switch or joystick on the control handle optionally the telescopic rod is extensible up to about 3 to 4 cm forming an ultrasonic scalpel edge of about 12 mm a preferred embodiment of the dissector head according to the present invention comprises at least one camera optionally disposed on the dissection head bridge most preferably the dissector head comprises a camera providing an operator with a visual depiction of the harvesting process as it is taking place a camera preferably provides a visual depiction of the ima anatomy allowing the operator to properly manipulate the dissector within the chest cavity while monitoring the dissector 39 s movements along the ima path preferably the camera utilized.