A tunable subminiature bio-telemetry transmitter

A telemetry system for single neuronal discharge recording from behaving monkey

A telemetry system for neuronal discharge recording from behaving monkeys positioned in a primate chair is described. Using FM telemetry system single neuronal activity was recorded from the monkey brain through five teflon-coated platinum-iridium microwire electrodes (25 mu in dia.). This system permits stable long term neuronal discharge recording during feeding behavior with minimal artifacts even during mastication. The system has a broadcasting distance of more than 30 m. The frequency response and the S/N ratio obtained from this system is almost comparable with that of the usual direct wire procedures, and the elimination of artifacts is superior. This report describes the procedure for constructing the microelectrode assembly and FM telemetry system.

Telemetry of several biological signals from behaving animals

A telemetry device is described for recording ECG, EMG, EEG, multiple and single unit activity from central nervous system. It implies the use of a FET input operational amplifier and an FM oscillator. It can be used with different electrodes and in many animal species when behavioral studies and completely unrestrained subjects are requested.