Age-related changes in force, stress, and pressure of lower esophageal sphincter of the rat.
D000375:Aging; D000818:Animals; D004558:Electric Stimulation; D004943:Esophagogastric Junction / Q000502:physiology*; D005260:Female; D066298:In Vitro Techniques; D008433:Mathematics; D009119:Muscle Contraction; D009129:Muscle Tonus; D051381:Rats