title: A study of the knee jerk.
mesh_terms: D000161:Acoustic Stimulation; D001307:Auditory Perception; D003071:Cognition; D003214:Conditioning, Classical; D004597:Electroshock; D006801:Humans; D008526:Medulla Oblongata / Q000502:physiology; D008959:Models, Neurological; D008960:Models, Psychological; D009046:Motor Neurons / Q000502:physiology; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D010329:Patella; D010812:Physical Stimulation; D011930:Reaction Time; D012026:Reflex, Stretch; D013116:Spinal Cord / Q000502:physiology; D013848:Thigh / Q000502:physiology*