Browsing Student Research Day by Author "Janik, Daniel S."
Now showing items 1-13 of 13
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Central Administration of Noradrenergic Drugs and Circadian Phase Shifts.
Smrz, Matthew L. (2009-02-10)Earlier work has shown that systemic administration of beta-adrenergic antagonist (beta-blocker) propranolol greatly reduces nonphotically induced phase shifts of circadian rhythms indicating that noradrenergic ... -
Characterization of Nonphotic Resetting of the Mouse Circadian Clock.
Kowalski, Cassondra (2009-04)We have constructed a phase response curve (PRC), for light-to-dark transitions in male mice showing the phase shifts are specific to the Phase of the daily cycle at which they are administered. As is true for nonphotic ... -
Does limiting night-time locomotor activity result in greater circadian clock resetting?
Nicolet, Brianna; Schneider, Cary (2013-05)Circadian rhythms play a role in a variety of functions, such as hormone secretion, sleep, and activity level, and are essential for overall well-being and health. In order to maintain these cycles, resetting of the ... -
Effect of Nightlight on Circadian Clock Resetting in Mice.
Hartshorn, Kaitlin (2009-04)Mice, like all animals, have an "internal clock" that strongly affects their activity levels. They are nocturnal, demonstrating high levels of activity at night and sleeping during the day. Previous studies have demonstrated ... -
Effects of Dim Phase Light Intensity Modulation on Circadian Rhythms in Syrian Hamsters.
Mergenthaler, Mathew (2009-04)Nonphotic stimulation induces arousal in animals and resets circadian clocks. It is known that maximal phase advances in circadian locomotor activity in Mesocricetus auratus are produced by stimuli at Zeitgeber time (ZT) ... -
Efficiency of Verbal and Mechanical Markers for Training a Difficult or Simple Behavior in Pet Dogs
Snider, Kaitlin; Joniaux, Jessica (2012-04)In behavioral science, a marker is a stimulus that closely follows a behavior. The marker is followed by a reinforcer (e.g., a food treat) and helps associate the behavior with the reinforcer. This study looked at the ... -
Identification of Brain Regions Activated with Arousal-Induced Clock Resetting in Mice
Schenk, Jonathan E.; Schultz, Andrew T.; Olson, Robert G. (2015-04)The purpose of this experiment was to investigate these possible regions by determining activation patterns in mouse brains given a transition to complete darkness. -
Methamphetamine Induces Nonphotic Resetting of Circadian Clock in the Male Syrian Hamster.
Smrz, Matthew L. (2009-04)Resetting of circadian clocks in male Syrian Hamsters can be manipulated photically and nonphotically. Previous work suggested that Propranolol, a know beta-adrengergic antagonist, may block nonphotic clock resetting in ... -
Nonphotic Clock Resetting in Mice
Tillman, Sarah K. (2009-02-11)The circadian clock regulates many aspects of body function including the daily rest/activity cycle and sleep/wake cycle. To stay in synchrony with the environmental light/dark cycle the clock must be reset periodically ... -
A Phase Response Curve for Light-to-Dark Transitions in Mice
Polzin, Brandon; Fix, Anna; Clark, Summer; Janik, Daniel S. (2019-05)The circadian clock coordinates the timing of many functions including hormone secretions, digestive function, brain activity, sleep, and a variety of behaviors. Evidence suggests that an improperly functioning biological ... -
Sympathetic Activation and Circadian Clock Resetting in Mice
Isaacson, Alexandra (2013-05)Mice are nocturnal animals that exhibit predictable activity patterns controlled by their internal (circadian) clock. It has been demonstrated that a mouse's circadian clock can be reset 1-3 hours earlier by various ... -
Video Analysis of Hamster Behavior During Circadian Clock Resetting.
Hehli, Daniel (2009-01-26)Previous studies have indicated that wheel running behavior is not an exclusive predictor of circadian clock phase shifting (Mistlberger et al., 2003). What is the animal doing if it is not running in the wheel? Since ... -
Yohimbine-Induced Circadian Clock Resetting in Mice
Isaacson, Alexandra; Ruff-Berganza, Sophia (2012-04)Mice are nocturnal animals that exhibit predictable activity patterns controlled by their internal (circadian) clock. This study demonstrated that a mouse's circadian clock can be reset to an earlier time through the ...