DOCSLIB.ORG

Monitoring and Analysis of Hemodynamic Response to Cold Noxious Stimuli

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Monitoring and Analysis of Hemodynamic Response to Cold Noxious Stimuli Monitoring and Analysis of Hemodynamic Response to Cold Noxious Stimuli Using Functional Near Infrared Spectroscopy A Thesis Submitted to the Faculty of Drexel University by Zeinab Barati In partial fulfillment of the requirements for the degree of Doctor of Philosophy July 2013 © Copyright 2013 Zeinab Barati. All Rights Reserved. i Dedications To my beloved parents for their unconditional love and support And to my husband for his love, patience, and encouragement ii Acknowledgements I would like to first thank my supervisor Dr. Kambiz Pourrezaei for his guidance and support in the course of completing this research. It was a great honor to work under his supervision. His support was far beyond supervising a research project. I learned life- lasting lessons through his thoughtful critiques and recommendations that will undoubtedly help me in my future career. I would like to extend my gratitude to my co-adviser Dr. Issa Zakeri who generously devoted his time educating me on advanced statistical techniques and supervised the data analyses. I am also thankful to Dr. Patricia Shewokis for her guidance in the statistical analysis during the first couple of years of this PhD research. I also thank the committee members Dr. Arye Rosen, Dr. Joshua Jacobs, and Dr. John Grothusen for their time and effort to serve on my committee and review my dissertation. I am very thankful to our lab‟s faculty members Dr. Meltem Izzetoglu and Dr. Hasan Ayaz for their help and guidance with signal processing and hardware. I also would like to thank my lab colleagues Rutvi Vyas, Kang Hee Lee, Daryl Omire- Mayor, and Esther Lim for their help in hardware and experimentation and more importantly, making the long hours of lab work much easier and enjoyable. iii I would like to appreciate all of my friends who supported me emotionally during my graduate studies in Philadelphia. My very special thanks go to Marjan Saboktakin, Saba Borujerdi, Zahra Javaheri, Sedigheh Banihashemi, Somayeh Yousefi, Shokouh Pourarian and all my friends at Mahdieh community. I would like to appreciate the financial support from the School of Biomedical Engineering, Science, and Health Systems and especially, I would like to thank Dr. Banu Onaral for her support and guidance. And at the end, I am very thankful to my family and specially my husband for their encouragement and love. iv Table of Contents List of Tables ________________________________________________________________ vii List of Figures _______________________________________________________________ viii ABSTRACT _________________________________________________________________ xiii CHAPTER 1: INTRODUCTION _________________________________________________ 1 1.1. Background __________________________________________________________ 1 1.2. Problem Statement _____________________________________________________ 5 1.3. Objectives ___________________________________________________________ 6 1.4. Specific Aims and Research Hypotheses ____________________________________ 6 1.5. Significance __________________________________________________________ 7 1.6. Outline ______________________________________________________________ 8 CHAPTER 2: HEMODYNAMIC RESPONSE TO REPEATED NOXIOUS COLD PRESSOR TESTS MEASURED BY FUNCTIONAL NEAR INFRARED SPECTROSCOPY ON FOREHEAD _________________________________________________________________ 9 2.1. Abstract _____________________________________________________________ 9 2.2. Introduction _________________________________________________________ 10 2.3. Materials and Methods _________________________________________________ 13 2.3.1 fNIRS Principles and Instrumentation _________________________________ 13 2.3.2 Subjects ________________________________________________________ 15 2.3.3 Protocol ________________________________________________________ 16 2.3.4 fNIR Data Processing _____________________________________________ 18 2.4. Results _______________________________________________________________ 19 2.4.1. The effect of a CPT on the THb concentration __________________________ 21 2.4.2. Adaptation to repeated CPTs observable in subjective pain ratings and THb ___ 24 v 2.4.3. Correlation analysis between ΔTHb and subjective pain scores _____________ 30 2.4.4. Comparing ΔTHb response at the „far channels‟ with the „near channels‟ across left and right sides of the forehead ____________________________________________ 30 2.5. Discussion __________________________________________________________ 33 2.6. Acknowledgement ____________________________________________________ 37 CHAPTER 3: FUNCTIONAL DATA ANALYSIS VIEW OF FNIRS DATA _____________ 38 3.1. Abstract ____________________________________________________________ 38 3.2. Introduction _________________________________________________________ 39 3.3. Materials and Methods _________________________________________________ 43 3.3.1. Participants ______________________________________________________ 43 3.3.2. Protocol ________________________________________________________ 43 3.3.3. Measurements ___________________________________________________ 44 3.3.4. Functional Data Analysis ___________________________________________ 45 3.4. Results _____________________________________________________________ 50 3.4.1. fNIR Data Pre-processing __________________________________________ 50 3.4.2. Results of fPCA __________________________________________________ 54 3.4.3. Rotating PCs ____________________________________________________ 58 3.4.4. Results of fCCA __________________________________________________ 62 3.5. Discussion __________________________________________________________ 64 3.6. Acknowledgment _____________________________________________________ 69 CHAPTER 4: HEMODYNAMIC RESPONSE TO COLD TOLERANCE TESTS AT DIFFERENT TEMPERATURES ________________________________________________ 70 4.1. Introduction _________________________________________________________ 70 4.2. Methods ____________________________________________________________ 71 4.2.1. Subjects ________________________________________________________ 71 4.2.2. Instrument ______________________________________________________ 72 vi 4.2.3. Protocol ________________________________________________________ 72 4.2.4. Features ________________________________________________________ 73 4.2.5. Statistical Data Analysis ___________________________________________ 74 4.3. Results _____________________________________________________________ 80 4.3.1. Analysis of maximum reported pain, pain threshold and pain tolerance _______ 80 4.3.2. Statistical Analysis of Hb and HbO2 __________________________________ 84 4.4. Discussion _________________________________________________________ 103 4.5. Conclusion ___________________________________________________________ 106 CHAPTER 5: SUMMARY, FUTURE WORK, AND CLINICAL APPLICATIONS _______ 108 5.1. Summary __________________________________________________________ 108 5.2. Future work ________________________________________________________ 110 5.3. Clinical Applications _________________________________________________ 111 List of References ___________________________________________________________ 113 VITA _____________________________________________________________________ 123 vii List of Tables 1. Results of repeated measures ANOVA on THb during the four experimental conditions: baseline, pre-stimulus, stimulus, and post-stimulus conditions……………..22 2. Pairwise condition comparisons across the Forehead Side and Channel including 95% confidence intervals and effect sizes for THb , comparing the four conditions: the baseline, 1st pre-stimulus, 1st stimulus, and 1st post-stimulus conditions…………....…23 3. Main effect of cold pressor test (CPT) trials repeated measures ANOVAs on THb ……………………………………………………………………………………...26 4. Pairwise cold pressor test (CPT) trials comparisons across the Forehead Side and Channel including 95% confidence intervals and effect sizes for THb …………………27 5. Within-subjects correlation values between self-reported pain rating scores and ΔTHb……………………………………………………………………………………..30 6. Pairwise channel pair comparisons across cold pressor test (CPT) trials including 95% confidence intervals and effect sizes for ΔTHb………………………………………….32 7. Regression Coefficients……………………………………………………..………...83 8. Type III tests of model covariates for the dependent variable delta_Hb………..…….88 9. Type III tests of model covariates for the dependent variable delta_HbO2…………..93 10. Type III tests of model covariates for the dependent variable MV……………….....98 11. Type III tests of model covariates for the dependent variable MA………………...102 viii List of Figures 1. A schematic of the fNIRS probe configuration. Photons travel from a light source to a photodetector through a banana shape pathway with a penetration depth of half the source-detector distance. Measures are approximate…………………………...………..15 2. A demonstration of the placement of fNIRS probes on a subject‟s forehead. The probes are shown reversed to illustrate the location of the light source and photodetectors……………………………………………………………………………17 3. Block diagram of the protocol…………………………………………………...……17 4A-B. The hemodynamic response to three trials of cold pressor test (CPT) averaged across 20 subjects on the right (a) and left (b) sides of the forehead. The black vertical lines represent time points at which subjects switched their hand from the tepid water to the ice water and vice versa. The pink shaded field represents the baseline period, the orange shaded fields represent the immersion
Load more

Recommended publications
  • Descending Control Mechanisms and Chronic Pain
    Current Rheumatology Reports (2019) 21: 13 https://doi.org/10.1007/s11926-019-0813-1 CHRONIC PAIN (R STAUD, SECTION EDITOR) Descending Control Mechanisms and Chronic Pain QiLiang Chen1 & Mary M. Heinricher2,3 Published online: 4 March 2019 # Springer Science+Business Media, LLC, part of Springer Nature 2019 Abstract Purpose of Review The goal of the review was to highlight recent advances in our understanding of descending pain- modulating systems and how these contribute to persistent pain states, with an emphasis on the current state of knowledge around “bottom-up” (sensory) and “top-down” (higher structures mediating cognitive and emotional processing) influences on pain-modulating circuits. Recent Findings The connectivity, physiology, and function of these systems have been characterized extensively over the last 30 years. The field is now beginning to ask how and when these systems are engaged to modulate pain. A recent focus is on the parabrachial complex, now recognized as the major relay of nociceptive information to pain- modulating circuits, and plasticity in this circuit and its connections to the RVM is marked in persistent inflamma- tory pain. Top-down influences from higher structures, including hypothalamus, amygdala, and medial prefrontal areas, are also considered. Summary The challenge will be to tease out mechanisms through which a particular behavioral context engages distinct circuits to enhance or suppress pain, and to understand how these mechanisms contribute to chronic pain. Keywords Pain modulation . Brainstem . Persistent pain . Inflammation . Hypersensitivity Introduction physical injury, or develop after a primary injury has healed, making targeted treatments or surgical interventions difficult. Current pharmacological treatments for chronic pain Moreover, pharmacological therapies used for acute pain are have limited efficacy and undesirable side effects, par- generally less effective in chronic pain conditions.
    [Show full text]
  • Study Protocol and Statistical Analysis Plan
    (CCI) Committee on Clinical Investigations Page 1 of 21 Pain sensitization and habituation in a model of experimentally- induced insomnia symptoms NCT02484742 08/16/2017 Study Description – Part B CCI Form: 3-2013 PI Revision Date: 08/16/2017 (CCI) Committee on Clinical Investigations Page 2 of 21 PART B STUDY DESCRIPTION Pain sensitization and habituation in a model of experimentally- TITLE OF PROTOCOL induced insomnia symptoms Principal Investigator Monika Haack PhD Mailing Address Dana 779, 330 Brookline Ave E-Mail Address [email protected] P.I.’s Telephone 7-5234 P.I.’s Pager Fax: Sponsor/Funding Source NIH/NINDS B1. PURPOSE OF PROTOCOL Sleep is believed to have a protective effect on health, given findings that sleep deficiency, such as insomnia, results in suboptimal well-being8 and adverse health consequences25. At least 40% of individuals suffering from symptoms of insomnia (e.g., difficulty initiating sleep, disrupted sleep, or waking up too early) also suffer from co-morbid chronic pain28;39. Though it was traditionally believed that the experience of pain causes insomnia symptoms, recent evidence has demonstrated that insomnia itself is a strong predictor of pain both in general as well as in chronic pain populations12. Despite strong evidence for a sleep-to-pain directionality20, the mechanisms by which insomnia amplifies the experience of pain is not yet understood. The goal of this project is to understand pain amplification in response to insomnia from a mechanistic perspective. Given the high prevalence of chronic pain and coexisting insomnia, there is a critical need to invest in research designed to identify these mechanistic pathways.
    [Show full text]
  • A-10) Maldynia: Pathophysiology and Non-Pharmacologic Treatment (Resolution 525, A-08) (Reference Committee E
    REPORT 5 OF THE COUNCIL ON SCIENCE AND PUBLIC HEALTH (A-10) Maldynia: Pathophysiology and Non-pharmacologic Treatment (Resolution 525, A-08) (Reference Committee E) EXECUTIVE SUMMARY Objective. The Council previously examined the issue of neuropathic pain, particularly the role of pharmacotherapy for symptomatic management. This report addresses recent findings on the pathogenesis of neuropathic pain. Per the request of Resolution 525 (A-08), attention is devoted to the concept that development of maladaptive pain (maldynia) justifies its classification as a disease. Additionally, the scope of non-pharmacologic approaches employed in patients with maladaptive pain is discussed. Methods. English-language reports on studies using human subjects were selected from a MEDLINE search of the literature from 1995 to March 2010 using the search terms “maldynia” or “neuropath*,” in combination with “pain,” “pathophysiology,” “diagnosis,” and “treatment.” In addition, the Cochrane Library was searched using the term “pain,” in combination with “neuropathic” or “neuropathy’” and “psychologic,” “stimulation,” “spinal cord,” “acupuncture,” or “hypnosis.” A total of 406 articles were retrieved for analysis. Articles were selected for their ability to supply information about the pathogenesis of neuropathic pain, and modes of therapy beyond pharmacologic intervention. When high-quality systematic reviews and meta-analyses were identified, they formed the basis for summary statements about treatment effectiveness. Additional articles were identified by manual review of the references cited in these publications. Further information was obtained from the Internet sites of the American Pain Society (www.ampainsoc.org), American Academy of Pain Medicine (www.painmed.org), American Academy of Pain Management (www.aapainmanage.org), and the American College of Occupational and Environmental Medicine (www.acoem.org).
    [Show full text]
  • Opioid-Induced Hyperalgesia (OIH)
    Opioid-Induced Hyperalgesia (OIH) Brian Johnson M.D. Assoc Prof Psychiatry and Anesthesia SUNY Upstate Medical University Disclosures • Research on shifts in the hypothalamic- pituitary-adrenal system and depression during and after alcohol withdrawal sponsored by the Distilled Spirits Council of the United States (Johnson 1986) Learning Objectives 1. Get the “big picture” about why opioid prescribing has accelerated recently, setting the environment for OIH to be commonplace 2. Know the definition of OIH 3. Know the neural mechanisms of OIH 4. Know the effect of methadone or buprenorphine maintenance on OIH Learning Objectives 2 5. Know how long it takes to induce OIH 6. Know what to do about OIH; with addicted patients and non-addicted patients 7. Understand the surgical pain management of a patient with OIH 1. The Big Picture • Practitioners often remark that use of opioids has become ubiquitous. The following slides show how common opioid prescribing has become, what the impetus was behind the shift in medical practice, and what are some of the unimagined consequences of a social movement that was not evidence-based. The existence of OIH has been recognized only after the impact of the right to pain treatment movement had its effect. Opioid Use Has Exploded! • 2009 USA, 5% of world’s population • 56% of global morphine • 81% of global oxycodone • 99% of global hydrocodone (Huxtable 2011) Opioid-Associated Deaths - USA • Year 1998 2005 • Oxycodone 14 1007 • Morphine 82 329 • Fentanyl 92 1245 • Methadone 8 329 (Huxtable 2011) “Pain Management: A Fundamental Human Right” “Reasons for deficiencies in pain management included cultural, societal, religious and political attitudes, including acceptance of torture.
    [Show full text]
  • Understanding How Opioids Contribute to Reward and Analgesia
    Understanding How Opioids Contribute to Reward and Analgesia Howard L. Fields, M.D., Ph.D. Opioids acting at the mu opioid (MOP) receptor produce powerful analgesia. They also produce an intensely rewarding effect that can lead to addiction. The analgesic effect of MOP receptor agonists derives from a direct inhibitory effect on pain transmission at the spinal-cord level and through activation of a descending pain- modulatory pathway. The rewarding effect of MOP agonists is the result of their actions in the mesostriatal dopamine pathway classically associated with both natural and drug rewards. Both the analgesic and rewarding effect of MOP agonists are best understood in the context of decision making under conditions of conflict. Pain is one of many competing motivational states, and endogenous opioids suppress responses to noxious stimuli in the presence of conflicting motivations, such as hunger or a threatening predator. When a food reward is available, MOP agonists microinjected into the mesostriatal circuit promote its consumption, while concomitantly suppressing responses to noxious stimulation. The mesostriatal “reward” circuit, thus, appears to perform a function critical to decision making and can either amplify or suppress responses to noxious stimuli. Reg Anesth Pain Med 2007;32:242-246. Key Words: Morphine, Pain modulation, Accumbens, Medulla, Periaqueductal gray, Threat, Palatability. ecause pain is ubiquitous and is associated with play a major role in determining what an individual Brobust objective and subjective responses, it experiences. Clinicians who see patients with long- has been conceptualized in many different ways. standing pain problems are often struck by exacer- One broadly accepted concept is that pain is the bations and remissions in the severity of the pa- sensation that results from somatic stimuli of suffi- tient’s pain that are independent of objective cient intensity to threaten tissue damage (see Sher- changes in a peripheral pathologic process.
    [Show full text]
  • How Body Movement Influences Virtual Reality Analgesia?
    How body movement influences Virtual Reality analgesia? Marcin Czub Joanna Piskorz Institute of Psychology Institute of Psychology University of Wroclaw University of Wroclaw Poland Poland [email protected] [email protected] Abstract— In this study, we tested the hypothesis that increased studies are related to acute pain, but there have been also some body movement while steering a virtual reality game leads to the attempts at using VR for chronic pain treatment [7]. diminished experience of pain. We also investigated the relationship between presence in a virtual environment and pain However, the mechanisms of VR analgesia are still not fully intensity. 30 students of Wroclaw University participated in the known, as well as parameters of Virtual Environment (VE) within subject experiment (20 females: average age: 20.55 and 10 which contribute to pain alleviation. Several published studies males: average age: 25.60). The participants were looking at the tested various properties of VEs but failed to find significant game through head mounted displays. In two experimental differences in their effectiveness [8, 9, 10, 11, 12]. Mühlberger conditions a participant navigated the game using a computer et al. [8] studied the effect of VE content on hot/cold pain mouse (a small movement), or a Microsoft Kinect (a large stimuli endurance. Participants were immersed in „warm” and movement). Thermal (cold) stimulation was used to inflict pain. „cold” VEs, while experiencing hot and cold pain stimulation. While playing the game, the participants immersed their non- The pain reduction effect was similar in both VR conditions, dominant hands in a container with cold water (temperature 0.5 - regardless of the content of virtual environment VE that was 1.5°C).
    [Show full text]
  • Cold Pressor Test in Tetraplegia and Paraplegia Suggests an Independent Role of the Thoracic Spinal Cord in the Hemodynamic Responses to Cold
    Spinal Cord (2008) 46, 33–38 & 2008 International Spinal Cord Society All rights reserved 1362-4393/08 $30.00 www.nature.com/sc ORIGINAL ARTICLE Cold pressor test in tetraplegia and paraplegia suggests an independent role of the thoracic spinal cord in the hemodynamic responses to cold A Catz1,2, V Bluvshtein1, I Pinhas3, S Akselrod3, I Gelernter4, T Nissel5, Y Vered5, N Bornstein2,5 and AD Korczyn2,5 1The Spinal Department, Loewenstein Rehabilitation Hospital, Raanana, Israel; 2Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel; 3The Center for Medical Physics, Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv, Israel; 4Faculty of Exact Sciences, The Statistical Laboratory, School of Mathematics, Tel-Aviv University, Tel-Aviv, Israel and 5Neurology Department and Biochemistry Laboratory, Tel-Aviv Medical Center, Tel-Aviv, Israel Background: Cold application to the hand (CAH) is associated in healthy people with increase in heart rate (HR) and blood pressure (BP). Objective: To study hemodynamic responses to CAH in humans following spinal cord injuries of various levels, and examine the effect of spinal cord integrity on the cold pressor response. Design: An experimental controlled study. Setting: The spinal research laboratory, Loewenstein Hospital, Raanana, Israel. Subjects: Thirteen healthy subjects, 10 patients with traumatic T4–6 paraplegia and 11 patients with traumatic C4–7 tetraplegia. Main outcome measures: HR, BP, HR and BP spectral components (low frequency, LF; high frequency, HF; LF/HF), cerebral blood flow velocity (CBFV) and cerebrovascular resistance index (CVRi). Methods: The outcome measures of the three subject groups monitored for HR, BP and CBFV were compared from 5 min before to 5 min after 40–150 s of CAH.
    [Show full text]
  • CHAPTER 1 Basic Science of Pain
    CHAPTER 1 Basic Science of Pain CASEY J. FISHER, MD • TONY L. YAKSH, PHD • KELLY BRUNO, MD • KELLY A. EDDINGER, BS, RVT INTRODUCTION detect noxious stimuli, they are triggered to discharge Clinically, the most commonly referenced definition of when the range of temperature or pressure corresponds pain initially described by Harold Merskey in 1964, and to what would be considered painful. The distal termi- as adopted by the International Association in the Study nals of these small C fibers display large branching den- of Pain in 1979, defines pain as “an unpleasant sensory dritic trees and are characterized as being “free” nerve and emotional experience associated with actual or po- endings. These nerve endings can be activated further tential tissue damage, or described in terms of such by many specific agents in the periphery in response damage.”1 In this chapter, we will give an overview of to tissue injury, inflammation, or infection in a the pathways involved in pain processing as it occurs concentration-dependent fashion. Table 1.1 depicts in both the central and peripheral nervous systems as the source and nature of these agents as well as the is currently conceived. This overview will include: anat- eponymous receptor on C fibers that is activated with omy involved in the processing of nociceptive stimuli; each agent. The fact that there are multiple stimulus the fundamentals of systems underlying acute nocicep- modalities for these C fibers that can lead to a signal tion and persistent pain states; and the linkage to of pain is the reason they are known as C-polymodal chronic pain and how the immune system plays a role nociceptors.
    [Show full text]
  • Acute and Chronic Effects of Resistance Exercise on Autonomic Modulation and Vascular Function in Women with Fibromyalgia James Derek Kingsley
    Florida State University Libraries Electronic Theses, Treatises and Dissertations The Graduate School 2009 Acute and Chronic Effects of Resistance Exercise on Autonomic Modulation and Vascular Function in Women with Fibromyalgia James Derek Kingsley Follow this and additional works at the FSU Digital Library. For more information, please contact [email protected] THE FLORIDA STATE UNIVERSITY COLLEGE OF HUMAN SCIENCES ACUTE AND CHRONIC EFFECTS OF RESISTANCE EXERCISE ON AUTONOMIC MODULATION AND VASCULAR FUNCTION IN WOMEN WITH FIBROMYALGIA By JAMES DEREK KINGSLEY A Dissertation submitted to the Department of Nutrition, Food and Exercise Sciences in partial fulfillment of the requirements for the degree of Doctor of Philosophy Degree Awarded: Fall Semester, 2009 The members of the committee approve the dissertation of James Derek Kingsley defended on June 2nd, 2009. ________________________ Arturo Figueroa Professor Directing Dissertation ________________________ Karen Berkley Outside Committee Member ________________________ Lynn Panton Committee Member ________________________ Michael Overton Committee Member Approved: ________________________________________ Bahram Arjmandi, Chairperson, Department of Nutrition, Food and Exercise Sciences ________________________________________ Billie Collier, Dean, College of Human Sciences The Graduate School has verified and approved the above-named committee members. ii I would like to dedicate my work to my mother, Georgia Kingsley. When I started my work with Fibromyalgia, I had no idea what it was, how to diagnose it, or how to treat it. Since then I have spearheaded 2 studies on Fibromyalgia and assisted on 2 others. I have learned about the disease from the existing literature and I have also contributed to it. I have also learned a great deal from the women that I have had the pleasure of working with through the years.
    [Show full text]
  • Does Spirituality Matter? Effects of Meditative Content
    DOES SPIRITUALITY MATTER? EFFECTS OF MEDITATIVE CONTENT AND ORIENTATION ON MIGRAINEURS Amy B. Wachholtz A Dissertation Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY May 2006 Committee: Kenneth I. Pargament, Advisor Haliu Kassa Graduate Faculty Representative Robert A. Carels Dara R. Musher-Eizenman ii ABSTRACT Kenneth I. Pargament, Advisor Migraine headaches are associated with high depressive and anxiety symptoms (Waldie & Poulton, 2002) as well as low feelings of self-efficacy, which can negatively impact pain tolerance and positive active coping (French, et al., 2000). Previous research suggests that religion can have a positive effect on physical and mental health (Koenig, McCullough, & Larson, 2001, for a review), and specifically, spiritual meditation may ameliorate some of these negative traits associated with migraine headaches (Wachholtz & Pargament, 2005). Spiritual meditation is one method that may help migraineurs to increase their spiritual experiences, reduce depression and anxiety, and improve their self-efficacy to improve both their quality of life. This study examined two primary questions: 1) Do different meditation types create different outcomes among migraineurs? and, 2) How does meditation orientation affect mental, physical, and spiritual health outcomes among migraineurs? Eighty-three meditation naïve, frequent migraineurs were gathered from the Bowling Green State University undergraduate community. Participants were taught Spiritual Meditation, Internally Focused Secular Meditation, Externally Focused Meditation, or Relaxation techniques. Participants independently practiced their techniques for twenty minutes a day for one month. Pre-post tests measured pain tolerance (with a cold pressor task), and headache frequency, as well as a number of mental, and spiritual health variables.
    [Show full text]
  • NOCICEPTORS and the PERCEPTION of PAIN Alan Fein
    NOCICEPTORS AND THE PERCEPTION OF PAIN Alan Fein, Ph.D. Revised May 2014 NOCICEPTORS AND THE PERCEPTION OF PAIN Alan Fein, Ph.D. Professor of Cell Biology University of Connecticut Health Center 263 Farmington Ave. Farmington, CT 06030-3505 Email: [email protected] Telephone: 860-679-2263 Fax: 860-679-1269 Revised May 2014 i NOCICEPTORS AND THE PERCEPTION OF PAIN CONTENTS Chapter 1: INTRODUCTION CLASSIFICATION OF NOCICEPTORS BY THE CONDUCTION VELOCITY OF THEIR AXONS CLASSIFICATION OF NOCICEPTORS BY THE NOXIOUS STIMULUS HYPERSENSITIVITY: HYPERALGESIA AND ALLODYNIA Chapter 2: IONIC PERMEABILITY AND SENSORY TRANSDUCTION ION CHANNELS SENSORY STIMULI Chapter 3: THERMAL RECEPTORS AND MECHANICAL RECEPTORS MAMMALIAN TRP CHANNELS CHEMESTHESIS MEDIATORS OF NOXIOUS HEAT TRPV1 TRPV1 AS A THERAPEUTIC TARGET TRPV2 TRPV3 TRPV4 TRPM3 ANO1 ii TRPA1 TRPM8 MECHANICAL NOCICEPTORS Chapter 4: CHEMICAL MEDIATORS OF PAIN AND THEIR RECEPTORS 34 SEROTONIN BRADYKININ PHOSPHOLIPASE-C AND PHOSPHOLIPASE-A2 PHOSPHOLIPASE-C PHOSPHOLIPASE-A2 12-LIPOXYGENASE (LOX) PATHWAY CYCLOOXYGENASE (COX) PATHWAY ATP P2X RECEPTORS VISCERAL PAIN P2Y RECEPTORS PROTEINASE-ACTIVATED RECEPTORS NEUROGENIC INFLAMMATION LOW pH LYSOPHOSPHATIDIC ACID Epac (EXCHANGE PROTEIN DIRECTLY ACTIVATED BY cAMP) NERVE GROWTH FACTOR Chapter 5: Na+, K+, Ca++ and HCN CHANNELS iii + Na CHANNELS Nav1.7 Nav1.8 Nav 1.9 Nav 1.3 Nav 1.1 and Nav 1.6 + K CHANNELS + ATP-SENSITIVE K CHANNELS GIRK CHANNELS K2P CHANNELS KNa CHANNELS + OUTWARD K CHANNELS ++ Ca CHANNELS HCN CHANNELS Chapter 6: NEUROPATHIC PAIN ANIMAL
    [Show full text]
  • Effect of Cold Pressor Test on Reaction Time.Pdf (518.1Kb)
    Effect of Cold Pressor Test on Reaction Time Authors: Matthew Laton, Hans Backlund, Elliot Toy, Majaliwa Matango, Kayla Sippl, Yunting Tao Lab 603, Group 3 Key Words: Reaction Time, Cold Pressor Test, Sympathetic Nervous System, Temperature, Blood Pressure, Pulse Number of Words: 3,474 Abstract The purpose of this study was to examine variation in reaction time when a Cold Pressor Test (CPT) was administered. The three minute CPT was conducted in attempt to increase a person’s sympathetic response. Heart rate and blood pressure measurements were recorded throughout the test to accurately monitor participant’s response. In the study, the CPT was paired with an audio reaction time test conducted during the first and third minute of the experiment. The recorded measurements were then compared to the subjects’ baseline heart rate, blood pressure, and reaction time to determine statistical significance. It was found that average initial heart rate increased (n=37, p=6.14E-7<0.05), however the average mean arterial blood pressure (MABP) showed no significant change, thus leading to inconclusiveness in the degree of sympathetic activation due to the CPT. Compared to the average reaction time in room temperature water, the average reaction time during the cold pressor test decreased (n=37, p=0.0307<0.05), suggesting that the CPT had an effect on the reaction time of the individual. Further studies that also increase the sympathetic response could be conducted in order to allow for a better comparison between sympathetic response and reaction time. Introduction Extremely cold conditions have been found to activate a physiological stress response in the body in order to maintain homeostasis (Lambert et al., 2014; Lambert and Schlaich, 2004; Victor et al., 1987).
    [Show full text]