A monitoring device alerts an animal owner immediately of a pet urine spraying occurrence. The cephalad prostheses are adapted and configured to be attached to a lamina portion of a vertebra without blocking a pedicle portion of the cephalad vertebra. The power control circuit selectively routes a first flow of electricity from the main battery to the DC output when the first flow of electricity exceeds a predetermined value, and routes a second flow of electricity from the backup battery to the DC output when the first flow of electricity falls below the predetermined value. A resist layer is deposited on the circuit and then exposed to the radiation so that those resist portions which are located above the depression and those located away from the depression receive amounts of radiation that are below and above, respectively, the development threshold of the resist. The non-contact brake assembly has a first brake element mounted on the base and a second brake element mounted on the tray assembly and un-contacting the first brake element.