An endoscope is provided which comprises an elongated body adapted for insertion into a body lumen, and a plurality of electrically controlled actuators associated with the body which are controllable to impart an orientation to the body that is complimentary to the natural orientation of the lumen into which the endoscope is inserted. A first engagement surface serves as a cam surface. In particular, such diseases are central nervous system disorders selected from the group of anxiety, schizophrenia, migraine, depression, and epilepsy. The method may also include developing a filtered manifest that includes a list of files needed by the client application and associated with the condition. This structure in which the peripheral circuits are arranged at the center portion of the chip permits the longest signal transition paths to be shortened to about one half of the chip size to speed up the DRAM which is intended to have a large storage capacity.