Jessica F Knutson

Learn More
Pigeons were trained to key peck for food on multiple reinforcement schedules including components of continuous and fixed-ratio reinforcement and extinction. At the end of the chamber opposite the response key was a restrained target pigeon. The target restraining equipment was designed to record automatically blows struck against the target. When the(More)
In a series of experiments the effects of colony lighting conditions on home-cage aggression were examined, and the relation among measures of home-cage aggressive behavior and shock-induced aggression were determined. In each experiment rats were maintained under either a light/dark (LD) cycle or a continous light (LL) schedule. Experiments 1A and 1B(More)
Prostaglandins are lipid-derived molecules that mediate the generation of fever in the central nervous system. In addition to their proinflammatory role, prostaglandins also impact neuronal development and synaptic plasticity, sometimes in a sex-specific manner. The cerebellum has a high expression of prostaglandin receptors during development, but the role(More)
Rats were instrumented with arterial catheters and directional pulsed Doppler flow probes for measurement of arterial blood pressure, heart rate, and blood flow in the renal, mesenteric, and hindquarter vascular beds. When tested as intruders in a resident-intruder aggression test, subjects responded to resident attack with species-characteristic defensive(More)
Rats were instrumented with arterial catheters and directional-pulsed Doppler flow probes for assessment of blood pressure, heart rate, and blood flow in the renal, mesenteric, and hindquarter vascular beds. Subjects were tested in an intermittent shock procedure under paired and isolated social conditions and the cardiovascular indices associated with(More)
A series of experiments was conducted to establish free-operant escape-avoidance responding in rats using noise as the stimulus. Naive rats did not acquire a bar-press response on an escape-avoidance of noise schedule. Similarly, free-operant responding established using escape-avoidance of shock was not maintained when noise was substituted for shock.(More)
A series of experiments was conducted to assess the influence of home-cage lighting conditions on shock-induced aggression in rats. The first two experiments tested rats six times within 24 hr and demonstrated that subjects maintained on a light/dark (LD) cycle fought more than rats maintained on a 24-hr light schedule (LL). In addition, a periodic trend(More)