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.
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Showing 1 to 19 of 19 for “"parasympathetic activity"”.
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Early Parasympathetic Activity Predicts Later Childhood Social Functioning as Mediated by Emotion Regulation
… sinus arrhythmia (RSA), which reflect vagal activity, in early childhood can inform the development of social and emotional behaviors later in life. Low RSA at baseline and during a stressful task have been associated with symptoms of ED and disorders characterized by social impairments. The …
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Cardiac Autonomic Assessment and Diastolic Function in Individuals with Spinal Cord Injury
… investigate the influence of cardiac autonomic activity and blood volume on diastolic function in individuals with SCI. Results from Study 1 showed that the QTVI increased when participants performed a cardiovascular (CV) stress maneuver, and subsequently returned to baseline after blocking …
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The effects of nonnutritive sucking on state regulation in preterm infants
… following NNS is an adjunct to an increase in parasympathetic activity. This increase in parasympathetic activity is hypothesized to be adaptive. Through this mechanism sucking is hypothesized to have a distinct behavioral effect on energy regulation in newborn infants outside of the …
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Heart rate variability and neurocognitive performance in blue- and white-collar workers: Implications for cardiac risks
… were obtained to complete the experiment. Higher parasympathetic activity was significantly associated to less errors made by the white-collar workers in the SWM task (r = -0.30, p = 0.04). The blue-collar workers also showed a relationship between higher parasympathetic activity and enhanced …
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Resting Microvascular and Autonomic Function in Relation to Age and Sex Hormone Concentrations
… sinus arrhythmia (RSA) indicating lower parasympathetic activity and positively correlated with diastolic blood pressure (DBP) and mean arterial pressure (MAP). Estradiol positively correlated with the low frequency/high frequency ratio of HRV, indicating higher sympathetic activity, and …
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Investigation of heart rate variability during sleep apnea
… sleep, internal influences (sympathetic and parasympathetic nervous system activities) dominate the autonomic nervous system; in addition repetitive apneas are accompanied by a pronounced increase in average heart rate. The aim of this study was to investigate the heart rate variability using …
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Relationship between the autonomic nervous system and the recovering heart post exercise using heart rate variability
… determine if a relationship exists between the activity of the autonomic nervous system (ANS) and the speed of heart rate recovery post maximal exercise. The parasympathetic branch of the ANS was assessed during rest by obtaining the high frequency (HF) component of the heart rate variability …
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The effect of aerobic base training on heart-rate variability and performance in elite youth football players
… nervous system (ANS), meaning a drop in parasympathetic activity and an increase in sympathetic activity in the ANS. Research has shown that steady state exercise (60-70% of maximum heart rate) can increase parasympathetic activity in the ANS which would increase HRV (Borghi-Silva et al., …
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Exploring the relationship between anxiety sensitivity and heart rate variability
… rate variability (HRV), a biomarker of autonomic activity. Like AS, HRV has been well studied in clinical samples. High-frequency heart rate variability (HF-HRV), which indexes parasympathetic activity, has been shown to be lower among clinical samples, relative to controls and during behavioral …
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A model of sinoatrial node cell regulation by the autonomic nervous system
… is tightly regulated by the sympathetic and parasympathetic branches of the autonomic nervous system. Our understanding of sinoatrial node cell function has been greatly advanced by experimental and modeling efforts that quantitatively describe the numerous ionic currents responsible for the …
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Health and Welfare Implications of Temperament Differences in Dairy Cattle
… temperament, comprised of the five traits Activity, Aggression, Boldness, Exploration and Sociability, was validated in lactating dairy cattle using factor analysis on the results of behavioural testing. The validated framework was used to quantify the temperaments of cattle at 21, 60 and …
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Salivary VIP concentrations are elevated in humans after acute stress
… that are released as a result of sympathetic and parasympathetic activity respectively. These two biomarkers are measured extensively in the blood or plasma but they are not routinely measured in saliva (Morgan et al., 2000). These neuropeptides will be evaluated in conjunction with the following …
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You Hurt My Feelings: Autonomic and Behavioral Responses to Social Exclusion and the Moderating Effect of Psychopathic Traits
… or excluded in an online social game while the activity of their autonomic nervous system was recorded. Following the game, participants completed a task during which they were able to aggress against an individual that has either included or excluded them in the prior game. Results showed that …
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Altered Autonomic Nervous System Function in Chickens Divergently Selected for Body Weight
Autonomic nervous system activity is related to body weight regulation. Based on the MONA LISA hypothesis it has been suggested that most obese subjects and animals have low sympathetic nervous system activity. The aim of this study was to investigate whether there are differences in autonomic …
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Modeled and Unmodeled Approaches for Quantification of the Cardiac Autonomic Nervous System
… baroreceptor reflex) and arousal. Tracking ANS activity in patients may provide information about traumatic brain injury, heart failure, stroke, diabetes, and sports performance; information that can ultimately aid in clinical decision making. In this work, we develop a non-invasive model-based …
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Developing a Digital Sustainability Framework for Interior Construction Projects: A Stakeholder-Centred Digital Platform for Sustainable Decision-Making and Biophilic Integration
… frequency ratio (LF/HF), capturing parasympathetic activity and autonomic balance. Waterscapes containing dynamic or biotic elements yielded the most consistent restorative benefits. Water-bird scenes reduced systolic blood pressure by 8.00 mmHg (p < 0.001) and achieved the highest …
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Neuroscience tools in novel contexts: developing thermogenetics in Drosophila and decoding autonomic activity in mouse major pelvic ganglion
… models provide the opportunity to decode neural activity via the ability to precisely stimulate and record neural events associated with quantifiable circuit and behavioral outputs (Bernstein et al., 2012; Boyden et al., 2005; Deisseroth et al., 2006; Roth, 2016). As neuroscientists continue to …
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Maternal Obesity During Pregnancy: Cardiovascular Outcomes for Mother and Baby
… the heart, including an increase in sympathetic activity and a decrease in parasympathetic activity, are a common feature of heart failure. Previous studies have suggested that maternal obesity programmes changes in autonomic control of the offspring heart. In Chapter 4 of this thesis, a new …
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Cardiovascular, autonomic and neuropathic physiology and their involvement in the extra-articular manifestations of hypermobility disorders
… measure of autonomic nervous system (ANS) activity, followed by an examination of the effect of age and sex on HRV, recorded using this device in a large population of healthy volunteers, with the aim of developing a substantial normative HRV dataset in healthy individuals across a wide …