Short- and long-term effects of various milk-delivery contingencies on sucking and nipple attachment in rat pups.

Varied milk delivery contingencies differentially affect sucking in rat pups as measured by jaw-muscle electromyographic activity. In Experiment I we found that 11-13-day-old pups sucked more frequently when receiving tiny intermittent pulses of milk than when receiving no milk, and continued to suck at a high rate for at least 30 min after cessation of milk delivery. In subsequent experiments we found that pups 13-18 days of age engaged in more frequent sucking if receiving milk continuously rather than intermittently, and that this increased rate of sucking persisted for at least 24 hr after cessation of milk delivery. Pups given experience with continuous milk delivery from 14 to 18 days of age also spent significantly more time attached to the nipple at 19 days of age than did pups in control groups. It was concluded that experience with different milk delivery schedules can affect subsequent sucking and nipple attachment behavior.

[1]  M. Hofer,et al.  Suckling in the rat: evidence for patterned behavior during sleep. , 1984, Behavioral neuroscience.

[2]  R. Sullivan,et al.  The role of intraoral and gastrointestinal cues in the control of sucking and milk consumption in rat pups. , 1982, Developmental psychobiology.

[3]  S. Brake.  Suckling infant rats learn a preference for a novel olfactory stimulus paired with milk delivery. , 1981, Science.

[4]  W. G. Hall,et al.  The role of experience in suckling maintenance in albino rats. , 1980 .

[5]  W. G. Hall,et al.  The ontogeny of nipple-shifting behavior in albino rats: mechanisms of control and possible significance. , 1980, Developmental psychobiology.

[6]  M. Hofer,et al.  Maternal deprivation and prolonged suckling in the absence of milk alter the frequency and intensity of sucking responses in neonatal rat pups , 1980, Physiology & Behavior.

[7]  W. G. Hall,et al.  Changing oral cues in suckling of weaning-age rats: possible contributions to weaning. , 1980 .

[8]  E. Blass,et al.  Ontogeny of preference for nutritive over nonnutritive suckling in albino rats. , 1979 .

[9]  W. G. Hall,et al.  Inhibition of suckling in weaning-age rats: a possible serotonergic mechanism. , 1979, Journal of comparative and physiological psychology.

[10]  M. Hofer,et al.  Electromyographic patterns associated with nonnutritive sucking in 11-13-day-old rat pups. , 1979 .

[11]  W. G. Hall,et al.  Development of nutritional control of food intake in suckling rat pups. , 1978, Behavioral biology.

[12]  R. Letz,et al.  Evidence for a transitional period for development of persistence in infant rats. , 1978 .

[13]  B. Campbell,et al.  Habituation of the forelimb-withdrawal response in neonatal rats. , 1978, Journal of experimental psychology. Animal behavior processes.

[14]  W. G. Hall,et al.  Suckling behavior and intake control in the developing rat pup. , 1977 .

[15]  D. Lincoln,et al.  The milk-ejection reflex of the rat: an intermittent function not abolished by surgical levels of anaesthesia. , 1973, The Journal of endocrinology.

[16]  P. Wolff.  Sucking Patterns of Infant Mammals , 1968 .

[17]  R. Bolles,et al.  The ontogeny of behaviour in the albino rat , 1964 .