Wireless power-supplying system for implanted electronic circuits in freely moving animals

A system for supplying power to implanted electronic circuits by means of an electromagnetic field has been developed and tested in chronic experiments with monkeys (Macaca Mulatta and Macaca Fascicularis), freely moving and interacting with each other. The transferred energy is used by electronic circuits which drive a number of telemetric multi-injectors within a headmounted container. The system makes use of batteries redundant. Besides saving space within the container this technique circumvents periodic changes of batteries, which is very important in long-term experiments, where disturbance of the social behaviour under study has to be reduced as far as possible.