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Physiology & Behavior|January 1, 1987
Juvenile play in the rat: thalamic and brain stem involvementS M Siviy, J PankseppJournal of Comparative Psychology (Washington, D.C. : 1983)|April 7, 1998
Anticipation of play elicits high-frequency ultrasonic vocalizations in young ratsB Knutson, J Burgdorf, J PankseppJournal of the Experimental Analysis of Behavior|January 1, 1984
Preference for signaled over unsignaled shock schedules: Ruling out asymmetry and response fixation as factorsB B Abbott, P BadiaActa Paediatrica (Oslo, Norway : 1992). Supplement|June 1, 1994
Brain opioids and mother-infant social motivationJ Panksepp, E Nelson, S SiviyPhysiology & Behavior|July 1, 1999
High-frequency ultrasonic vocalizations index conditioned pharmacological reward in ratsB Knutson, J Burgdorf, J PankseppBehavioral Neuroscience|June 1, 2000
Anticipation of rewarding electrical brain stimulation evokes ultrasonic vocalization in ratsJ Burgdorf, B Knutson, J PankseppNeuroscience and Biobehavioral Reviews|January 1, 1984
The psychobiology of play: theoretical and methodological perspectivesJ Panksepp, S Siviy, L NormansellPharmacology, Biochemistry, and Behavior|October 1, 1994
The effects of melatonin on isolation distress in chickensE Nelson, J Panksepp, S IkemotoPharmacology, Biochemistry, and Behavior|August 1, 1979
Morphine reduces social cohesion in ratsJ Panksepp, N Najam, F SoaresNeurotoxicology and Teratology|June 25, 1998
Long-term changes in rat social behavior following treatment with trimethylolpropaneM Y Bekkedal, J Panksepp, J RossiPageof 8