title: A head-holding device for repeated micro-electrode studies in monkeys during operant responding.
mesh_terms: D000818:Animals; D001921:Brain / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology; D004566:Electrodes; D004569:Electroencephalography / Q000295:instrumentation*; D004594:Electrophysiology / Q000295:instrumentation; D000882:Haplorhini; D006257:Head; D008722:Methods; D009474:Neurons / Q000502:physiology