1. A treatment system for modulating, approximating, or optimizing desired facial expressions by applying an agent or procedure to the face, head, or neck of a patient, the system comprising: a processor; a plurality of non-volatile program-memory locations coupled to the processor; a plurality of non-volatile data-memory locations coupled to the processor; a display device configured to be controlled by the processor; and, a camera configured to be controlled by the processor, wherein the plurality of non-volatile program-memory locations contains instructions that, when executed by the processor, cause the processor to perform operations comprising: receiving an image file of a full human face of a patient, the image file captured by the camera, the image file corresponding to a facial expression desired to be changed by the patient; sending for display on the display device the received image file; receiving, from the patient, information representative of a desired change in one or more selected Facial-Expression Activation Markers (FEAMs) of the facial expression desired to be changed, each of the one or more selected FEAMs corresponding to muscles or muscle groups; retrieving from the non-volatile data memory locations a facial expression activation pattern that is associated with the selected FEAMs, the facial expression activation pattern comprising one or more associated FEAMS and corresponding muscles or muscle groups, each of the one or more associated FEAMs and corresponding muscles or muscle groups having an activation intensity level; retrieving from the non-volatile data memory locations psycho-physiological states associated with one of the one or more associated FEAMs and corresponding muscles or muscle groups of the associated muscular activation pattern; receiving image files of facial expressions corresponding with the retrieved psycho-physiological states; receiving, from the user, information representative of a desired amount of change in the activation intensity level of the selected FEAMs; and generating a treatment program comprising one or more treatments approximating the desired facial expression while producing optimized corresponding changes in the expression of each of two or more psychophysiological states, each treatment location targeting one of the one or more selected FEAMs and corresponding muscles or muscle groups, each treatment location having an associated treatment and dosage information.