Physiology Commons^™

When Working Out Makes You Sick To Your Stomach: What To Know About Exercise-Induced Nausea, Anne R. Crecelius

Health and Sport Science Faculty Publications

You’re doing it! You’re working out, reaping all those benefits of exercise that have been drilled into your head.

So you’re pedaling your heart out or running like you’re escaping a zombie horde. You’re feeling accomplished, on cloud nine, until … your stomach starts to churn. You may even feel dizzy. Your feelings of accomplishment have turned to agony as you deal with a bout of nausea.

Exercise-induced nausea is quite common, as are exercise-induced gastrointestinal (GI) problems in general, affecting perhaps up to 90% of endurance athletes.

So why does this happen and, more important, how can you prevent …

Diverse And Complex Muscle Spindle Afferent Firing Properties Emerge From Multiscale Muscle Mechanics, Kyle P. Blum, Kenneth S. Campbell, Brian C. Horslen, Paul Nardelli, Stephen N. Housley, Timothy C. Cope, Lena H. Ting

Physiology Faculty Publications

Despite decades of research, we lack a mechanistic framework capable of predicting how movement-related signals are transformed into the diversity of muscle spindle afferent firing patterns observed experimentally, particularly in naturalistic behaviors. Here, a biophysical model demonstrates that well-known firing characteristics of mammalian muscle spindle Ia afferents – including movement history dependence, and nonlinear scaling with muscle stretch velocity – emerge from first principles of muscle contractile mechanics. Further, mechanical interactions of the muscle spindle with muscle-tendon dynamics reveal how motor commands to the muscle (alpha drive) versus muscle spindle (gamma drive) can cause highly variable and complex activity during …

Inhibition Of Oxidative Metabolism By Nitric Oxide Restricts Emcv Replication Selectively In Pancreatic Beta-Cells, Joshua D. Stafford, Chay Teng Yeo, John A. Corbett

Biological Sciences Faculty Research & Creative Works

Environmental factors, such as viral infection, are proposed to play a role in the initiation of autoimmune diabetes. In response to encephalomyocarditis virus (EMCV) infection, resident islet macrophages release the pro-inflammatory cytokine IL-1b, to levels that are sufficient to stimulate inducible nitric oxide synthase (iNOS) expression and production of micromolar levels of the free radical nitric oxide in neighboring b-cells. We have recently shown that nitric oxide inhibits EMCV replication and EMCV-mediated b-cell lysis and that this protection is associated with an inhibition of mitochondrial oxidative metabolism. Here we show that the protective actions of nitric oxide against EMCV infection …

Control Of Blood Volume Following Hypovolemic Challenge In Vertebrates: Transcapillary Versus Lymphatic Mechanisms., Stanley S. Hillman, Robert C. Drewes, Michael S. Hedrick

Biology Faculty Publications and Presentations

Anurans have an exceptional capacity for maintaining vascular volume compared with other groups of vertebrates. They can mobilize interstitial fluids via lymphatic return at rates that are ten-fold higher than mammals. This extraordinary capacity is the result of coordination of specialized skeletal muscles and pulmonary ventilation that vary volume and pressure of subcutaneous lymph sacs, thus moving lymph to dorsally located lymph hearts that return lymph to the vascular space. Variation in the capacity to mobilize lymph within anurans varies with the degree of terrestriality, development of skeletal muscles, lung volume and lung compliance, and lymph heart pressure development. This …

Influence Of Testosterone On Male-Male Competition In The Red-Sided Garter Snake, Thamnophis Sirtalis Parietalis, Isabella M. G. Bukovich

Senior Honors Projects, 2020-current

Female mimicry in the red-sided garter snake, Thamnophis sirtalis parietalis, is described in several well-studied evolutionary advantages, but an aspect that remains elusive is how reproductive traits are linked to the 3-fold higher circulating androgens in males with this phenotype. In this study, we implanted male garter snakes (n=15 per group) with either a blank implant (SHAM; control) or a T implant, the latter simulating the female mimic phenotype. Following simulated low-temperature dormancy, males were scored for courtship intensity over three days of behavioral trials with females housed in the same facility. Males were sacrificed, and sperm were collected …

The Crossroads Of Wellness And Second Victim Syndrome: Identifying Factors That Alter The Pathway Of Caregiver Recovery Following An Unanticipated Adverse Patient Outcome, Kimia Zarabian, A. Katharine Hindle, Ivy Benjenk, Anita Vincent, Jamil M. Kazma, Benjamin Shambon, Raymond Pla, Eric Heinz

Journal of Wellness

Introduction: Second Victim Syndrome (SVS) describes the phenomenon in which a caregiver experiences a traumatic psychological and emotional response to an adverse patient event or medical error. Using quantitative survey analysis, we aim to better understand the personal factors that affect SVS development and recovery.

Methods: Caregivers at a small urban academic medical center who had experienced an adverse patient event in the past six months were invited to take part in this institution-wide, voluntary, quantitative, cross-sectional study. Three surveys were administered; the Holmes-Rahe Life Stress Inventory (HRLSI) was used as a surrogate to measure stressful life events. The …

Efficacy Of Pulmonary Ultrasound Compared To N-Terminal Prohormone Brain Natriuretic Peptide As A Diagnostic Tool For Congestive Heart Failure In Patients Presenting With Acute Dyspnea In The Emergency Setting, Leah Krohn, Michael Burns

Physician Assistant Capstones, 2020-current

Objective: To determine the efficacy of using pulmonary ultrasound as a diagnostic tool in acute dyspnea of undetermined cause compared to the use of serum N-Terminal prohormone Brain Natriuretic Peptide (NT-proBNP) in the diagnosis of heart failure.

Design: Systematic literature review

Methods: Searches were conducted in PubMed and Scopus using the terms pulmonary ultrasound and congestive heart failure and studies within the last 10 years. Studies that used pulmonary ultrasound compared to BNP as a marker for the diagnosis of heart failure were included.

Results: All three studies found that the use of pulmonary ultrasound was a more specific …

Biological Pretreatment Of Biomass For Enhanced Biogas Production, Skylar F. Van Horne

Undergraduate Honors Theses

The biogas output efficiency of controlled anaerobic digestion (AD) can be enhanced by several different pretreatment methods to produce renewable energy. According to the literature, there are pros and cons to each pretreatment method. Biological pretreatment provides environmentally safe and renewable means for enhancing biodegradability and net energy output. Current research has yet to reliably demonstrate the ability of bacterial strains, such as Caldicellulosiruptor bescii (C. bescii), to digest common waste substrates in efficient ways. Novel methods in key intermediate molecular quantification and alkalinity tracking are used here to explore C. bescii’s ability to digest lignocellulosic material in …

K2p2.1 (Trek-1) Potassium Channel Activation Protects Against Hyperoxia-Induced Lung Injury, Tatiana Zyrianova, Benjamin Lopez, Riccardo Olcese, John Belperio, Christopher M. Waters, Leanne Wong, Victoria Nguyen, Sriharsha Talapaneni, Andreas Schwingshackl

Physiology Faculty Publications

No targeted therapies exist to counteract Hyperoxia (HO)-induced Acute Lung Injury (HALI). We previously found that HO downregulates alveolar K_2P2.1 (TREK-1) K⁺ channels, which results in worsening lung injury. This decrease in TREK-1 levels leaves a subset of channels amendable to pharmacological intervention. Therefore, we hypothesized that TREK-1 activation protects against HALI. We treated HO-exposed mice and primary alveolar epithelial cells (AECs) with the novel TREK-1 activators ML335 and BL1249, and quantified physiological, histological, and biochemical lung injury markers. We determined the effects of these drugs on epithelial TREK-1 currents, plasma membrane potential (Em), and intracellular Ca …

Prenatal Alcohol Exposure Alters Transcriptional Expression Of Stress And Tlr4-Related Immune Signaling Factors In The Brain Following Early Life Stress, Chaselyn D. Ruffaner-Hanson

Biomedical Sciences ETDs

Background: Depression and anxiety disorders, believed to be caused by stress-related neuropeptides and pro-inflammatory molecules in the brain, are prevalent comorbidities of fetal alcohol spectrum disorders (FASD).

Methods: Brain tissue was collected following a 4-hour maternal separation stress during the early postnatal period, postnatal days 10 and 12, from mice subjected to 1^st and 2^nd trimester prenatal alcohol exposure (PAE).

Hypothesis: We hypothesized that PAE leads to glucocorticoid receptor insensitivity, stress molecule overexpression, and potentiated toll-like receptor 4 (TLR4) pathway inflammatory responses in the brain following early life stress.

Results: PAE and stress increased mRNA expression of TLR4 …

A Change At The Park: Muscular Dystrophy-Duchenne, Pranav Manoj, Amber Bautista, Bridget Bunt

Human Diseases Graphic Novels

No abstract provided.

Asthma, Rachel Hodge, Brenna Christoffel

Human Diseases Graphic Novels

No abstract provided.

Addison's Disease And Parkinson's Disease, Jade Bates, Minju Oh, Megan Ptak

Human Diseases Graphic Novels

No abstract provided.

Patho Graphic Novels: Epilepsy, Lily Isibue, Melissa Myint, Laila Walton

Human Diseases Graphic Novels

No abstract provided.

Lung Cancer, Ahana Narayanan, Maia Peregrino, Moorea Gay

Human Diseases Graphic Novels

No abstract provided.

Celiac Disease, Maia Peregrino, Ahana Narayanan, Moorea Gay

Human Diseases Graphic Novels

No abstract provided.

Nervous System: Alzheimer’S Disease, Krisha Patel, Saachi Kumar, Delicia Chen

Human Diseases Graphic Novels

No abstract provided.

Supersize It! Developing A "Supercytoplast" Through Platelet Fusion, Taulbee B. Gunter

Animal Science Undergraduate Honors Theses

Stem cell research opens a wide range of possibilities from lab-grown tissues for medical purposes to cloned animals for livestock production. The issue with one of the most popular forms of cell recombination into a stem cell, known as somatic cell nuclear transfer (SCNT), is that it requires an oocyte. The requirement of an oocyte is often the host of public scrutiny for its economic and ethical issues. Platelets may offer a less expensive and more accessible alternative to oocytes as sources of naturally enucleated cells. Thus, the objective of this explorative research project is to isolate and fuse platelets …

The 2019 P-Mig Student Survey Report And Capturing The Undergraduate Perspective Of Physiology Programming, Jennifer Rogers, Jenny L. Mcfarland, Claudia I. Stanescu, Patrick L. Crosswhite, Anne R. Crecelius

Health and Sport Science Faculty Publications

The aim of the 2019 Student Survey was to inform the Physiology Majors Interest Group (PMIG) of characteristics of undergraduates enrolled in physiology courses or degree programs from across the United States, to be used as one input source for development of program-level guidelines. 1389 participants from seven universities completed the 2019 P-MIG Student Survey. 37% reported enrollment in a physiology/human physiology major; allied health related programs were the second most common (24%). 61% of respondents reported attending a community college, the majority of whom enrolled in one or more courses at a community college while in high school (44%). …

Biomechanical Properties Of Land Based And Shallow Water Wait: A Comparative Review Of Literature, Mostafa Yaghoubi, Philip Fink, Wyatt H. Page, Sarah P. Shultz

International Journal of Aquatic Research and Education

Aquatic locomotion exercises are frequently used in rehabilitation and cross-training for land-based athletes. Hydrostatic pressure, thermal conductivity and drag force affect a person's ability to move; therefore, it is important to understand differences of biomechanical gait in water vs land. This review investigated biomechanical differences between shallow water and land-based exercises. PubMed, Google Scholar, SPORTDiscus and Scopus were searched; 33 studies included walking forward (27), backward (6) and running (6). Electromyographic amplitude was similar or less in submaximal intensity during aquatic gait, in comparison to on land. At maximal intensities, however, the amplitude was similar (n=5) or higher (n=4) in …

Functional Compartmentalization Of Mlck In Fetal Arteries, Dane William Sorensen

Loma Linda University Electronic Theses, Dissertations & Projects

Changes in vascular structure and reactivity are amongst the most important that occur during the transition from fetal to newborn life, and are guided by the principle of ensuring adequate coupling of blood flow to metabolism. A clinical consequence of maladaptive fetal vascular adaptation to hypoxia is an increased probability for loss of cerebral autoregulation, increased risk for neonatal encephalopathy, and hypoxicischemic cerebral injury. MLCK is a very specific calcium-calmodulin dependent enzyme, with its only known substrate being MLC20, and is essential for the ability of VSMCs within resistance arteries to appropriately contract or relax in response to changes in …

A Functional Three-Dimensional Microphysiological Model Of Myeloma Bone Disease, Richard Visconti

Seton Hall University Dissertations and Theses (ETDs)

Multiple myeloma (MM) is a hematologic cancer caused by a mature B cell neoplasm, or plasmacytoma, that infiltrates the skeleton at several sites. The disease is characterized by uninhibited transformed plasma cell proliferation that disrupts skeletal homeostasis leading to decreased bone modeling and increased bone resorption. Osteolytic lesions (OL) or voids left in the bone, remain long after the treatment of the cancer and indicate disease progression to myeloma bone disease (MBD). Current combinatorial MM therapies inhibit malignant plasma cell proliferation, slow the progression towards MBD, and increase the mean five-year survival rate, but do little to improve osteoblastic function …

The Effect Of Epa And Dha On Skeletal Muscle Physiology And Energy Balance, Saeed Jebor Ghnaimawi

Graduate Theses and Dissertations

Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA) supplementation commonly suggested during pregnancy confers many health benefits on offspring and more recently improves fetal BAT development and induces myoblast trans-differentiation into adiopocytes through activating PPARs expression. Embryonic myoblast is a highly flexible cell showing great capacity to change its phenotype into adipocyte in response to EPA and DHA supplementation in many in vitro models. However, a little is known about the identity of derived adipocytes, whether, they change into brown or white adipocyte, and in vivo evidence is still missing. Given that the myogeneis process is initiated at the mid of …

Lung Epithelial Trpa1 Mediates Lipopolysaccharide-Induced Lung Inflammation In Bronchial Epithelial Cells And Mice, Hsin-Kuo Ko, An-Hsuan Lin, Diahn-Warng Perng, Tzong-Shyuan Lee, Yu Ru Kou

Physiology Faculty Publications

Toll-like receptor (TLR) 4 was originally thought to be the sole pattern recognition receptor for lipopolysaccharide (LPS). Transient receptor potential ankyrin 1 (TRPA1), a Ca²⁺-permeant channel, has been suggested as a non-TLR receptor membrane-bound sensor of LPS. We recently reported that TRPA1 is expressed in lung epithelial cells (LECs) and mediates lung inflammation induced by cigarette smoke. However, the role of TRPA1 in LPS-induced lung inflammation has not been conclusively defined, and its underlying cellular mechanisms remain unclear. In this study, our in vitro results showed that LPS sequentially produced a cascade of events, including the elevation of …

Sexually Dimorphic Oxytocin Receptor-Expressing Neurons In The Anteroventral Periventricular Nucleus Regulates Maternal Behavior, Kaustubh Sharma

LSU Doctoral Dissertations

The neurohypophysial hormone oxytocin is involved in the regulation of social behaviors, including social recognition, pair bonding, and sex-specific parental behaviors in a variety of species. Oxytocin triggers these social behaviors by binding to oxytocin receptors (OXTR) in various parts of the brain. Oxytocin-induced sex-typical behavior, therefore, suggests a sexual dimorphic distribution of OXTR in the brain. In recent years, the oxytocin system in the brain received tremendous attention as a potential pharmacological target for treatment of many psychiatric disorders, such as anxiety, autism spectrum disorders, and even sex-specific psychiatric disorder like postpartum depression (PPD). An important problem and a …

The Combined Effects Of Exercise-Induced Muscle Damage And Heat Stress On Acute Kidney Stress And Heat Strain During Subsequent Endurance Exercise, Zidong Li

Health, Exercise, and Sports Sciences ETDs

Purpose: The purpose of this study was to investigate the combined effect of downhill running and heat stress on muscle damage, as well as on heat strain and kidney stress during subsequent endurance exercise in the heat. Methods: Using a crossover design and randomized order, ten non-heat-acclimated, physically active males completed downhill running in a cool (EIMD in Cool) and hot (EIMD in Hot) environment followed by an exercise-heat stress (HS) test after 3-hour seated rest. Core temperature, heart rate, thermal sensation and ratings of perceived exertion were recorded throughout each exercise session. Blood and urine samples were collected at …

Mathematical Modelling Of Temperature Effects On The Afd Neuron Of Caenorhabditis Elegans, Zachary Mobille, Rosangela Follmann, Epaminondas Rosa

Annual Symposium on Biomathematics and Ecology Education and Research

No abstract provided.

Stochastic Modeling Of Ovarian Follicle Growth In Adult Female Rats, Zhaozhi Li

Annual Symposium on Biomathematics and Ecology Education and Research

No abstract provided.

No Changes In Appetite-Related Hormones Following Swimming And Cycling Exercise Interventions In Adults With Obesity, Brandon G. Fico, Mohammed Alkatan, Hirofumi Tanaka

International Journal of Exercise Science

International Journal of Exercise Science 13(2): 1819-1825, 2020. Swimming is a favorable and ideal modality of exercise for individuals with obesity and arthritis as it encompasses a minimal weight-bearing stress and a reduced heat load. However, the available evidence indicates that regular swimming may not be effective in reducing body weight and body fatness. A current hypothesis is that exercise in cold water stimulates appetite. We determined the effect of swimming training on appetite-related hormones. Thirty-nine adults with obesity and osteoarthritis were randomly assigned to 12 weeks of supervised swimming or cycling training. In the initial few weeks, participants exercised …

Cardiovascular And Muscular Response To No Load Exercise With Blood Flow Restriction, Wenyuan Zhu, Noam Yitzchaki, Tayla E. Kuehne, Ryo Kataoka, Kevin Mattocks, Samuel L. Buckner

International Journal of Exercise Science

International Journal of Exercise Science 13(2): 1807-1818, 2020. Changes in muscle thickness (MT), isometric torque, and arterial occlusion pressure (AOP) were examined following four sets of twenty unilateral elbow flexion exercise. Participants performed four sets of maximal voluntary contractions with no external load throughout a full range of motion of a bicep curl with and without the application of blood flow restriction (BFR). For torque there was an interaction (p = 0.012). The BFR condition had lower torque following exercise (56.07 ± 17.78 Nm) compared to the control condition (58.67 ± 19.06 Nm). For MT, there was a main …