title: Operant conditioning of isolated activity in specific muscles and precentral cells.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002540:Cerebral Cortex / Q000502:physiology*; D003216:Conditioning, Operant; D004576:Electromyography; D000882:Haplorhini; D009068:Movement; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D009474:Neurons