Abstract: In some examples, a medical device is configured to automatically determine a paresthesia threshold or a perception threshold of a patient in a second posture based on the paresthesia threshold or perception threshold of that patient in a first posture. The medical device may deliver an electrical stimulation signal to a patient and determine the paresthesia threshold or perception threshold for the patient in the first posture. The medical device may change the intensity of the electrical signal and receive an indication from the patient that they are experiencing paresthesia or perceiving the electrical stimulation signal. The medical device may then automatically determine a predicted paresthesia threshold or predicted perception threshold for a second posture based on the paresthesia threshold or perception threshold.

Abstract: A pigment comprising particles of uncalcined kaolin clay combined in the absence of a binder with an amount of an added source of zirconium ion, such as ammonium zirconium carbonate, at least sufficient to enhance optical character of a dried composition containing the pigment. In application, the pigment may be utilized in a coating for paper or other fibrous web substrate to produce sheet materials of enhanced opacity. Alternatively, the pigment may be employed as a filler in a fibrous web substrate to provide improved optical character of the material. Also disclosed is a method preparing a pigment, including preparing a dispersed slurry of clay particles in an aqueous medium, wherein the improvement comprises utilizing an uncalcined kaolin clay and introducing into the slurry in the absence of a binder the source of zirconium ion in an amount at least sufficient to enhance the optical character afforded by the pigment.