Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 157 for “"Circadian rhythm"”.
-
Circadian Rhythm in Intrinsic Heart Rate
… cardiac events (i.e. myocardial infarction, arrhythmias, stroke, and sudden cardiac death) show circadian patterns. Circadian HR fluctuations are traditionally thought to be controlled by the autonomic nervous system (ANS). However, recent studies have concluded that diurnal HR variation arise …
-
Circadian rhythm of cortisol and estradiol in healthy women
<p>ABSTRACT</p> <p>CIRCADIAN RHYTHM OF CORTISOL AND ESTRADIOL IN HEALTHY WOMEN</p> <p>by</p> <p>KARYN G. BUTLER</p> <p>AUGUST 2011</p> <p>Advisor: Dr. Jean E. Davis</p> <p>Major: Nursing</p> <p>Degree: Doctor of Philosophy</p> <p>Daily variation in human processes and behaviors has been identified …
-
Regulation of the Photosynthetic Circadian Rhythm in Euglena Gracilis
Made available in DSpace on 2015-05-14T15:08:30Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7804074.PDF: 4010348 bytes, checksum: 693b036569bb759fd2cc2e54eba6c3ff (MD5) Previous issue date: 1977
-
Methods for monitoring the human circadian rhythm in free-living
Our internal clock, the circadian clock, determines at which time we have our best cognitive abilities, are physically strongest, and when we are tired. Circadian clock phase is influenced primarily through exposure to light. A direct pathway from the eyes to the suprachiasmatic nucleus, where the …
-
Early Life Circadian Rhythm Disruptions Alters Brain and Behavior in Adulthood
… aim of this study is to investigate sleep and circadian rhythm disruptions during postnatal period on behavior in adulthood using an animal model (C57B/6 mice) where it is possible to disentangle these various confounding factors. In particular, the current study is examining the consequences …
-
Aptamer-Based Detection of Salivary Melatonin for Circadian Rhythm Sleep Disorders Monitoring
Circadian rhythms sleep disorders are linked to the disruption of daily levels of circulating melatonin. Current circadian rhythm sleep disorder diagnostic approaches are typically based on questionnaires (which lack objectivity), and/or on dim light melatonin onset tests (which are costly, …
-
Investigation into the molecular mechanisms underlying circadian rhythm disruption and human cancer
… of the core mammalian clock factors known to be rhythmically expressed throughout the body and directly binds to the tumor suppressor p53 and its negative regulator, the oncogenic mouse double minute-2 (MDM2) protein. PER2 modulates p53 transcriptional activity by preventing MDM2-mediated …
-
Analysis of Circadian Rhythm Using a Novel SCN-Specific Cre Transgenic Mouse Line
… nucleus (SCN) temporally organize behavior into circadian cycles of activity and rest. When dissociated, these neurons individually oscillate with various period, phase, and amplitude. These conflicting results can be reconciled if inter-neuronal networking in the SCN is required for a …
-
The Effect of Increased Sleep on the Circadian Rhythm of Salivary Cortisol Concentrations
… response. The activity of the HPA demonstrates a circadian rhythm. It is well known that sleep deprivation increases cortisol concentrations. In this study, we looked at the effect of an increase of one-hour sleep for one month on the circadian rhythm of the HPA.</p> <p>Eight college subjects …
-
Influence of Light Exposure on the Melanopsin Driven Pupil Response and Circadian Rhythm
… to the midbrain to control pupil size and circadian rhythm. Evidence suggests that light exposure plays a role in refractive error development. This study sought to investigate whether melatonin level and sleep quality can be modulated by decreasing nighttime input to the ipRGCs. Another …
-
Role of Aryl Hydrocarbon Receptor in Circadian Rhythm: A Novel Pathway to Dioxin Toxicity
… PAS domain family play a role in regulation of circadian rhythm; therefore the role of AhR in the circadian rhythm was investigated. First, to examine AhR as a basic component of the molecular clockwork, the circadian mRNA expression of AhR and its signaling targets in the suprachiasmatic …
-
Circadian rhythm, activity level, training habits and sports performance : the molecular and subjective components
Circadian rhythmicity, which is driven by a circadian clock, is a property of a biological process that displays an oscillation of approximately 24-hours even in the absence of external time cues. Individual differences in the preferred times of waking, activity and rest (sleep) are known as …
-
Exteroceptive and Interoceptive Stimuli in the Contextual Control of Behavior by Circadian Rhythm in Mice
… (stimulation from organisms' own bodies). Circadian rhythm (patterns of physiological activity and behavior organized around approximately 24-h cycles) is an important factor in determining behavior, and it is comprised of both exteroceptive and interoceptive stimulus factors. This study …
-
THE EFFECTS OF CIRCADIAN RHYTHM-RELATED MOOD ON RECOGNITION AND RECALL MEMORY FOR EMOTIONAL IMAGES
… been affected by the confounding influence of circadian factors. Mood may follow a circadian rhythm and research suggests that mood at the time of recall can influence the content of the memory recalled. This study was meant to determine whether the enhanced memory for emotional stimuli in the …
-
Development of a Novel Architectural Design Framework for Supporting Occupants' Healthy Circadian Rhythm in Interior Spaces
… the first individual to scientifically observe circadian rhythm. Since then, a great deal of study has been conducted, and its findings demonstrate that every human action, including digestion, sleep and waking hours, hormone release, blood pressure, and body temperature, is controlled by a …
-
The effects of time of day and circadian rhythm on performance during variable levels of cognitive workload
… Additionally, individual differences in circadian rhythm were explored by assessing participants’ circadian typology. No significant differences in performance were found resulting from time of day differences. However, performance and EEG differences were found based on phase of testing …
-
RNA interference with allatoregulating neuropeptide genes affecting circadian rhythm, development, mating and reproduction of Spodoptera frugiperda (Lepidoptera: Noctuidae)
… a significant role of this neuropeptide on the circadian rhythm of prepupal commitment and metamorphosis, but also on the profile of egg laying and the number of deposited eggs. In general, Spofr-AT 1 acts as a true allatotropin in larvae and adults, but its functions may be substituted, at …
-
Glymphatic flow diurnal variation in the brain inhibited by circadian rhythm disruption and recovered by arginine vasopressin administration
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
-
Evaluating sleep and circadian rhythm disturbances and symptoms of impulsivity and inattention: Implications for adult attention-deficit/hyperactivity disorder
… evidence pointing to dysfunction of the circadian timing system in ADHD, and individual differences in human chronotype and diurnal preference have been linked with impulsivity and attention problems in adults. In the work presented here we examined associations between a later circadian …
Page 1 of 8