In the Cayce readings, the sensory system most often refers to the organs of sensation. Thus, the ears, nose, eyes, and mouth were frequently associated with problems of the sensory system. Cayce sometimes used the expression "sensory organism" when referring to this system. The nerves associated with this system were also frequently discussed. The cranial nerves (including the 10th cranial/vagus/pneumogastric) were regarded as part of the sensory system.