title: Dual-channel telemetry system for recording vocalization-correlated neuronal activity in freely moving squirrel monkeys.
abstract: A miniature telemetric system is described which allows simultaneous measurements of neural activity and vocalization in freely moving monkeys within their social group. Single and multi-unit activities were detected with medium impedance electrodes that were fixed to self-made microdrives allowing accurate vertical positioning over a range of 8 mm. Vocalizations were registered by means of a piezo-ceramic device sensing the vocalization-induced skull vibrations. This allowed identification of the vocalizing animal in a larger group and eliminated environmental noise. Neuronal activity and vocalization were transmitted via separate channels of a FM transmitter using different carrier frequencies. The signals were decoded in two conventional FM receivers equipped with an automatic frequency control. The signals were stored for off-line analysis on a HiFi videotape recorder.
authors.affiliation: German Primate Centre, Göttingen, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Grohrock
authors.forename: U
authors.initials: U
authors.lastname: Häusler
authors.forename: U
authors.initials: U
authors.lastname: Jürgens
mesh_terms: D000669:Amplifiers, Electronic; D000818:Animals; D004567:Electrodes, Implanted; D004594:Electrophysiology; D008839:Microelectrodes; D009474:Neurons / Q000502:physiology*; D012453:Saimiri; D012919:Social Behavior; D013238:Stereotaxic Techniques; D013686:Telemetry / Q000295:instrumentation*; D014743:Videotape Recording; D014828:Vocalization, Animal / Q000502:physiology*