Long-term self-intravenous "drinking" in the rat.
D000818:Animals; D003216:Conditioning, Operant; D004231:Diuresis; D004326:Drinking; D004435:Eating; D007275:Injections, Intravenous; D008297:Male; D051381:Rats; D012054:Reinforcement, Psychology; D012469:Salivary Glands / Q000502:physiology; D012472:Salivation; D013894:Thirst; D013997:Time Factors; D014868:Water Deprivation; D014882:Water-Electrolyte Balance