Responses of lateral preoptic neurons in the rat to hypertonic sucrose and NaCl.
Multiple-unit recordings were taken from the lateral preoptic region during a series of hypertonic and isotonic NaCl and sucrose intracarotid injections. Subjects were 11 hooded rats (8 males and 3 ovariectomized females) under urethane anesthesia. The data showed that under favorable cannulation conditions there were strong multiple-unit responses to hypertonic sucrose injections, and that under these conditions NaCl injections were not significantly more effective than sucrose injections. The possible bearing of these findings on hypotheses concerning central receptors for thirst is discussed.
D000818:Animals; D001931:Brain Mapping; D005260:Female; D006982:Hypertonic Solutions; D007031:Hypothalamus / Q000187:drug effects*; D008297:Male; D009474:Neurons / Q000187:drug effects / Q000502:physiology; D011301:Preoptic Area / Q000187:drug effects* / Q000502:physiology; D051381:Rats; D012462:Saline Solution, Hypertonic / Q000494:pharmacology*; D012965:Sodium Chloride / Q000494:pharmacology*; D013395:Sucrose / Q000494:pharmacology*; D014882:Water-Electrolyte Balance / Q000187:drug effects
D006982:Hypertonic Solutions; D012462:Saline Solution, Hypertonic; D012965:Sodium Chloride; D013395:Sucrose