Circadian wheel-running activity of rats under schedules of limited daily access to salt.
Schedules of limited daily access to food result in 'anticipatory' activity preceding each daily feeding. It is well-established that such food-anticipatory activity depends on a food-entrainable circadian timing mechanism. In the present study, we sought to extend the generality of these results by maintaining rats in running wheels under schedules which provided access to salt solutions or to salty food for 2 hr each day. The animals were subjected to dietary, pharmacological and surgical treatments that promote salt appetite. However, we found no evidence for daily salt-anticipatory wheel running activity in any condition.
D000284:Administration, Oral; D000818:Animals; D002940:Circadian Rhythm / Q000187:drug effects*; D003900:Desoxycorticosterone / Q000494:pharmacology; D004039:Diet, Sodium-Restricted; D005665:Furosemide / Q000494:pharmacology; D008297:Male; D009043:Motor Activity / Q000187:drug effects / Q000502:physiology*; D051381:Rats; D011919:Rats, Inbred Strains; D012965:Sodium Chloride / Q000172:deficiency / Q000494:pharmacology*
D003900:Desoxycorticosterone; D012965:Sodium Chloride; D005665:Furosemide