title: Tonic functions of afferent systems: an evaluation of implied concepts.
mesh_terms: D000344:Afferent Pathways / Q000502:physiology*; D000818:Animals; D002490:Central Nervous System / Q000502:physiology; D009129:Muscle Tonus; D012018:Reflex / Q000502:physiology; D012679:Sense Organs / Q000502:physiology