Neural Plasticity in the Brain During Neuropathic Pain
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Long-Term Potentiation Differentially Affects Two Components of Synaptic
Proc. Nati. Acad. Sci. USA Vol. 85, pp. 9346-9350, December 1988 Neurobiology Long-term potentiation differentially affects two components of synaptic responses in hippocampus (plasticity/N-methyl-D-aspartate/D-2-amino-5-phosphonovglerate/facilitation) DOMINIQUE MULLER*t AND GARY LYNCH Center for the Neurobiology of Learning and Memory, University of California, Irvine, CA 92717 Communicated by Leon N Cooper, September 6, 1988 (receivedfor review June 20, 1988) ABSTRACT We have used low magnesium concentrations ing electrode was positioned in field CAlb between two and the specific antagonist D-2-amino-5-phosphonopentanoate stimulating electrodes placed in fields CAla and CAlc; this (D-AP5) to estimate the effects of long-term potentiation (LTP) allowed us to activate separate inputs to a common pool of on the N-methyl-D-aspartate (NMDA) and non-NMDA recep- target cells. Stimulation voltages were adjusted to produce tor-mediated components of postsynaptic responses. LTP in- field EPSPs of -1.5 mV and did not elicit population spikes duction resulted in a considerably larger potentiation of non- in any of the responses included for data analysis. NMDA as opposed to NMDA receptor-related currents. In- Paired-pulse facilitation was produced by applying two creasing the size of postsynaptic potentials with greater stimulation pulses separated by 30 or 50 ms to the same stimulation currents or with paired-pulse facilitation produced stimulating electrode and LTP was induced by patterned opposite effects; i.e., those aspects ofthe response dependent on burst stimulation-i.e., 10 bursts delivered at 5 Hz, each NMDA receptor's increased to a greater degree than did those burst being composed of four pulses at 100 Hz (see ref. -
Targeting Neuroplasticity for Balance Or Gait Deficit
August 2021 Volume 1 Issue 8 CADTH Horizon Scan The Portable Neuromodulation Stimulator: Targeting Neuroplasticity for Balance or Gait Deficit Health Technology Update Authors: Sara D. Khangura ISSN: 2563-6596 Disclaimer: The information in this document is intended to help Canadian health care decision-makers, health care professionals, health systems leaders, and policy-makers make well-informed decisions and thereby improve the quality of health care services. While patients and others may access this document, the document is made available for informational purposes only and no representations or warranties are made with respect to its fitness for any particular purpose. The information in this document should not be used as a substitute for professional medical advice or as a substitute for the application of clinical judgment in respect of the care of a particular patient or other professional judgment in any decision-making process. The Canadian Agency for Drugs and Technologies in Health (CADTH) does not endorse any information, drugs, therapies, treatments, products, processes, or services. While care has been taken to ensure that the information prepared by CADTH in this document is accurate, complete, and up to date as at the applicable date the material was first published by CADTH, CADTH does not make any guarantees to that effect. CADTH does not guarantee and is not responsible for the quality, currency, propriety, accuracy, or reasonableness of any statements, information, or conclusions contained in any third-party materials used in preparing this document. The views and opinions of third parties published in this document do not necessarily state or reflect those of CADTH. -
The Creation of Neuroscience
The Creation of Neuroscience The Society for Neuroscience and the Quest for Disciplinary Unity 1969-1995 Introduction rom the molecular biology of a single neuron to the breathtakingly complex circuitry of the entire human nervous system, our understanding of the brain and how it works has undergone radical F changes over the past century. These advances have brought us tantalizingly closer to genu- inely mechanistic and scientifically rigorous explanations of how the brain’s roughly 100 billion neurons, interacting through trillions of synaptic connections, function both as single units and as larger ensem- bles. The professional field of neuroscience, in keeping pace with these important scientific develop- ments, has dramatically reshaped the organization of biological sciences across the globe over the last 50 years. Much like physics during its dominant era in the 1950s and 1960s, neuroscience has become the leading scientific discipline with regard to funding, numbers of scientists, and numbers of trainees. Furthermore, neuroscience as fact, explanation, and myth has just as dramatically redrawn our cultural landscape and redefined how Western popular culture understands who we are as individuals. In the 1950s, especially in the United States, Freud and his successors stood at the center of all cultural expla- nations for psychological suffering. In the new millennium, we perceive such suffering as erupting no longer from a repressed unconscious but, instead, from a pathophysiology rooted in and caused by brain abnormalities and dysfunctions. Indeed, the normal as well as the pathological have become thoroughly neurobiological in the last several decades. In the process, entirely new vistas have opened up in fields ranging from neuroeconomics and neurophilosophy to consumer products, as exemplified by an entire line of soft drinks advertised as offering “neuro” benefits. -
Neurophysiology of Frog Dorsal Root Afferent Fibers and Their Intraspinal Processes
Loyola University Chicago Loyola eCommons Dissertations Theses and Dissertations 1989 Neurophysiology of Frog Dorsal Root Afferent Fibers and Their Intraspinal Processes Nancy C. Tkacs Loyola University Chicago Follow this and additional works at: https://ecommons.luc.edu/luc_diss Part of the Physiology Commons Recommended Citation Tkacs, Nancy C., "Neurophysiology of Frog Dorsal Root Afferent Fibers and Their Intraspinal Processes" (1989). Dissertations. 2652. https://ecommons.luc.edu/luc_diss/2652 This Dissertation is brought to you for free and open access by the Theses and Dissertations at Loyola eCommons. It has been accepted for inclusion in Dissertations by an authorized administrator of Loyola eCommons. For more information, please contact [email protected]. This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License. Copyright © 1989 Nancy C. Tkacs UBRA~Y·· NEUROPHYSIOLOGY OF FROG DORSAL ROOT AFFERENT FIBERS AND THEIR INTRASPINAL PROCESSES by Nancy C. Tkacs A Dissertation Submitted to the Faculty of the Graduate School of .Loyola University of Chicago in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy April 1989 DEDICATION To Bill, with deep love and gratitude ii ACKNOWLEDG.EMENTS I would like to thank the faculty of the Department of Physiology for the excellent training I have received. I am particularly grateful to Dr. James Filkins for supporting my dissertation research. My thanks also go to Dr. Charles Webber, Dr. David Euler, Dr. David Carpenter, and Dr. Sarah Shefner for serving on my dissertation committee. Their helpful suggestions added much to the research and the dissertation. My gratitude goes to several individuals who unselfishly shared their time, resources, and expertise. -
Action Potential and Synapses
SENSORY RECEPTORS RECEPTORS GATEWAY TO THE PERCEPTION AND SENSATION Registering of inputs, coding, integration and adequate response PROPERTIES OF THE SENSORY SYSTEM According the type of the stimulus: According to function: MECHANORECEPTORS Telereceptors CHEMORECEPTORS Exteroreceptors THERMORECEPTORS Proprioreceptors PHOTORECEPTORS interoreceptors NOCICEPTORS STIMULUS Reception Receptor – modified nerve or epithelial cell responsive to changes in external or internal environment with the ability to code these changes as electrical potentials Adequate stimulus – stimulus to which the receptor has lowest threshold – maximum sensitivity Transduction – transformation of the stimulus to membrane potential – to generator potential– to action potential Transmission – stimulus energies are transported to CNS in the form of action potentials Integration – sensory information is transported to CNS as frequency code (quantity of the stimulus, quantity of environmental changes) •Sensation is the awareness of changes in the internal and external environment •Perception is the conscious interpretation of those stimuli CLASSIFICATION OF RECEPTORS - adaptation NONADAPTING RECEPTORS WITH CONSTANT FIRING BY CONSTANT STIMULUS NONADAPTING – PAIN TONIC – SLOWLY ADAPTING With decrease of firing (AP frequency) by constant stimulus PHASIC– RAPIDLY ADAPTING With rapid decrease of firing (AP frequency) by constant stimulus ACCOMODATION – ADAPTATION CHARACTERISTICS OF PHASIC RECEPTORS ALTERATIONS OF THE MEMBRANE POTENTIAL ACTION POTENTIAL TRANSMEMBRANE POTENTIAL -
Brain Stimulation and Neuroplasticity
brain sciences Editorial Brain Stimulation and Neuroplasticity Ulrich Palm 1,2,* , Moussa A. Chalah 3,4 and Samar S. Ayache 3,4 1 Department of Psychiatry and Psychotherapy, Klinikum der Universität München, 80336 Munich, Germany 2 Medical Park Chiemseeblick, Rasthausstr. 25, 83233 Bernau-Felden, Germany 3 EA4391 Excitabilité Nerveuse & Thérapeutique, Université Paris Est Créteil, 94010 Créteil, France; [email protected] (M.A.C.); [email protected] (S.S.A.) 4 Service de Physiologie—Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique—Hôpitaux de Paris, 94010 Créteil, France * Correspondence: [email protected] Electrical or magnetic stimulation methods for brain or nerve modulation have been widely known for centuries, beginning with the Atlantic torpedo fish for the treatment of headaches in ancient Greece, followed by Luigi Galvani’s experiments with frog legs in baroque Italy, and leading to the interventional use of brain stimulation methods across Europe in the 19th century. However, actual research focusing on the development of tran- scranial magnetic stimulation (TMS) is beginning in the 1980s and transcranial electrical brain stimulation methods, such as transcranial direct current stimulation (tDCS), tran- scranial alternating current stimulation (tACS), and transcranial random noise stimulation (tRNS), are investigated from around the year 2000. Today, electrical, or magnetic stimulation methods are used for either the diagnosis or exploration of neurophysiology and neuroplasticity functions, or as a therapeutic interven- tion in neurologic or psychiatric disorders (i.e., structural damage or functional impairment of central or peripheral nerve function). This Special Issue ‘Brain Stimulation and Neuroplasticity’ gathers ten research articles Citation: Palm, U.; Chalah, M.A.; and two review articles on various magnetic and electrical brain stimulation methods in Ayache, S.S. -
Fast and Slow Synaptic Potentials Produced Ina Mammalian
Proc. Nat!. Acad. Sci. USA Vol. 83, pp. 1941-1944, March 1986 Neurobiology Fast and slow synaptic potentials produced in a mammalian sympathetic ganglion by colon distension (visceral afferent/inferior mesenteric ganglion/noncholinergic) STEPHEN PETERS AND DAVID L. KREULEN Department of Pharmacology, University of Arizona Health Sciences Center, Tucson, AZ 85724 Communicated by C. Ladd Prosser, November 1, 1985 ABSTRACT Radial distension of the large intestine pro- way also comprises noncholinergic fibers; indeed, it remains duced a slow depolarization in a population of neurons in the to be determined whether noncholinergic slow EPSPs even inferior mesenteric ganglion of the guinea pig. The slow occur physiologically. potentials often occurred simultaneously with cholinergic fast We report here the discovery of a noncholinergic sensory potentials [(excitatory postsynaptic potentials (EPSPs)] yet pathway that projects from the distal colon to the inferior persisted in the presence of nicotinic and muscarinic choliner- mesenteric ganglion (1MG) of the guinea pig. This pathway, gic antagonists when all fast EPSPs were absent. The amplitude activated by colon distension, produces noncholinergic slow of the distension-induced noncholinergic slow depolarization depolarizations resembling nerve-evoked slow EPSPs in increased with increasing distension pressure. For distensions sympathetic ganglion cells. Often, distension of the colon of 1-min duration at pressures of 10-20 cm of water, the mean produced both an increase in cholinergic EPSPs and a slow depolarization amplitude was 3.4 mV. The slow depolarization depolarization, suggesting a simultaneous action of two was associated with an increase in membrane resistance, and cell. The prolonged periods ofcolon distension resulted in a tachyphylax- different neurotransmitters on a single ganglion is of the depolarization. -
How Drugs Affect the Brain and Medication‐Assisted Treatment
How Drugs Affect the Brain And Medication‐Assisted Treatment Presented by Carl M. Dawson, M.S., MAC, LPC, Q‐SAP Learning Objectives After completing this section, participants will be able to: • Understand the scientific modalities neuroscientists use when studying addictions (Bio‐Psycho‐Social model of addictions, genetics and neuroplasticity) • Explore basic facts regarding the development and function of the human brain • Identify three “Feel Good” chemicals released by the brain (dopamine, serotonin, norepinephrine) • Discuss how addictive behaviors and drugs routinely “hijack” the human brain How Neuroscientists Study Addiction • All addictions (alcohol, drugs, gambling, porn, video games, food) activate the same neurological pleasure (reward) routes (pathways) in the brain • Addictionology uses the “Bio‐Psycho‐Social” model when studying addictions • Research has identified a strong genetic basis for all addiction behaviors (There is no single “addiction” gene, there are approx. 90 genes associated with addictions) How Neuroscientists Study Addiction • Remember: “Our genetics load the gun, but the environment pulls the trigger” • Addictions aren't only hijacking the brain’s activities but they have the ability to modify the neurological structures and activities of the brain (neuroplasticity) Neuroplasticity: is a term used in the field of neuroscience that defines the brain's ability to adapt, adjust and change based upon the strength and reward of the experience ‐ “Neurons that Fire Together, Wire Together” Donald O. Hebb (1904‐1985) Basic Facts and Regions of the Human Brain The average human brain weighs approximately three (3 lbs.) pounds, consisting of 60% protein (fat), possessing approximately 85 to 110 billion neurons and produces 15 watts of electricity, traveling at a speed of one‐half to 250 miles per hour Approximate Ages of the Human Brain 7,000 7,000 480,000 6 to 10 mil. -
The Brain That Changes Itself
The Brain That Changes Itself Stories of Personal Triumph from the Frontiers of Brain Science NORMAN DOIDGE, M.D. For Eugene L. Goldberg, M.D., because you said you might like to read it Contents 1 A Woman Perpetually Falling . Rescued by the Man Who Discovered the Plasticity of Our Senses 2 Building Herself a Better Brain A Woman Labeled "Retarded" Discovers How to Heal Herself 3 Redesigning the Brain A Scientist Changes Brains to Sharpen Perception and Memory, Increase Speed of Thought, and Heal Learning Problems 4 Acquiring Tastes and Loves What Neuroplasticity Teaches Us About Sexual Attraction and Love 5 Midnight Resurrections Stroke Victims Learn to Move and Speak Again 6 Brain Lock Unlocked Using Plasticity to Stop Worries, OPsessions, Compulsions, and Bad Habits 7 Pain The Dark Side of Plasticity 8 Imagination How Thinking Makes It So 9 Turning Our Ghosts into Ancestors Psychoanalysis as a Neuroplastic Therapy 10 Rejuvenation The Discovery of the Neuronal Stem Cell and Lessons for Preserving Our Brains 11 More than the Sum of Her Parts A Woman Shows Us How Radically Plastic the Brain Can Be Appendix 1 The Culturally Modified Brain Appendix 2 Plasticity and the Idea of Progress Note to the Reader All the names of people who have undergone neuroplastic transformations are real, except in the few places indicated, and in the cases of children and their families. The Notes and References section at the end of the book includes comments on both the chapters and the appendices. Preface This book is about the revolutionary discovery that the human brain can change itself, as told through the stories of the scientists, doctors, and patients who have together brought about these astonishing transformations. -
Michael M. Merzenich
Michael M. Merzenich BORN: Lebanon, Oregon May 15, 1942 EDUCATION: Public Schools, Lebanon, Oregon (1924–1935) University of Portland (Oregon), B.S. (1965) Johns Hopkins University, Ph.D. (1968) University of Wisconsin Postdoctoral Fellow (1968–1971) APPOINTMENTS: Assistant and Associate Professor, University of California at San Francisco (1971–1980) Francis A. Sooy Professor, University of California at San Francisco (1981–2008) President and CEO, Scientifi c Learning Corporation (1995–1996) Chief Scientifi c Offi cer, Scientifi c Learning Corporation (1996–2003) Chief Scientifi c Offi cer, Posit Science Corporation (2004–present) President and CEO, Brain Plasticity Institute (2008–present) HONORS AND AWARDS (SELECTED): Cortical Discoverer Prize, Cajal Club (1994) IPSEN Prize (Paris, 1997) Zotterman Prize (Stockholm, 1998) Craik Prize (Cambridge, 1998) National Academy of Sciences, U.S.A. (1999) Lashley Award, American Philosophical Society (1999) Thomas Edison Prize (Menlo Park, NJ, 2000) American Psychological Society Distinguished Scientifi c Contribution Award (2001) Zülch Prize, Max-Planck Society (2002) Genius Award, Cure Autism Now (2002) Purkinje Medal, Czech Academy (2003) Neurotechnologist of the Year (2006) Institute of Medicine (2008) Michael M. Merzenich has conducted studies defi ning the functional organization of the auditory and somatosensory nervous systems. Initial models of a commercially successful cochlear implant (now distributed by Boston Scientifi c) were developed in his laboratory. Seminal research on cortical plasticity conducted in his laboratory contributed to our current understanding of the phenomenology of brain plasticity across the human lifetime. Merzenich extended this research into the commercial world by co-founding three brain plasticity-based therapeutic software companies (Scientifi c Learning, Posit Science, and Brain Plasticity Institute). -
Protocol Title: Cracking Addiction
Protocol Title: Cracking addiction: does BRAIN Stimulation-induced neuroplasticity reverse prefrontal cortex hypoactivity in cocaine and neW stImulanTs addiCtion in Humans (BRAIN SWITCH)? Abbreviated title: Transcranial Magnetic Stimulation for Cocaine Addiction Protocol Number: 1496 Date of Approval: June 29, 2017 Principal Investigator Name, Degree Branch/Institute Phone E-mail Massimo di Dept. of +39 0871358928 [email protected] Giannantonio, Neuroscience, MD Imaging and Clinical Sciences (ITAB) – University of Chieti Co- Principal Investigator Name, Degree Branch/Institute Phone E-mail Giovanni Dept. of +39 08713556914 [email protected] Martinotti, M.D., Neuroscience, Ph.D. Imaging and Clinical Sciences (ITAB) – University of Chieti Villa Maria Pia Clinic - Rome Associate Investigators Name, Degree Branch/Institute Phone E-mail Chiara MNB/NINDS +39 3281264713 [email protected] Montemitro, M.D. Mauro MNB/NINDS +39 3391979487 [email protected] Pettorruso, M.D. Lamberto Office of +39 3474727282 [email protected] Manzoli, Ph.D. Biostatistics/ University of Ferrara Referral Contact Name, Degree Branch/Institute Phone E-mail Mauro Pettorruso, MNB/NINDS +39 3391979487 [email protected] M.D. 1 Accountable Investigator Name, Degree Branch/Institute Phone E-mail Giovanni Dept. of +39 08713556914 [email protected] Martinotti, M.D., Neuroscience, Ph.D. Imaging and Clinical Sciences (ITAB) – University of Chieti Villa Maria Pia Clinic - Rome 2 A. Précis Background: Cocaine use disorder (CUD) are a major public health concern, associated with high relapse rates, significant disability and substantial mortality. In Italy, it has been recently estimated that up to 4.8% of subjects between the ages of 15-64 have assumed cocaine at least once, whereas 1.3% subjects currently have a diagnosis of CUD. -
Nervous Tissue
Nervous Tissue • Controls and integrates all body activities within limits that maintain life • Three basic functions – sensing changes with sensory receptors • fullness of stomach or sun on your face – interpreting and remembering those changes – reacting to those changes with effectors • muscular contractions • glandular secretions 12-1 Major Structures of the Nervous System • Brain, cranial nerves, spinal cord, spinal nerves, ganglia, enteric plexuses and sensory receptors 12-2 Organization of the Nervous System • CNS is brain and spinal cord • PNS is everything else 12-3 Nervous System Divisions • Central nervous system (CNS) – consists of the brain and spinal cord • Peripheral nervous system (PNS) – consists of cranial and spinal nerves that contain both sensory and motor fibers – connects CNS to muscles, glands & all sensory receptors 12-4 Subdivisions of the PNS • Somatic (voluntary) nervous system (SNS) – neurons from cutaneous and special sensory receptors to the CNS – motor neurons to skeletal muscle tissue • Autonomic (involuntary) nervous systems – sensory neurons from visceral organs to CNS – motor neurons to smooth & cardiac muscle and glands • sympathetic division (speeds up heart rate) • parasympathetic division (slow down heart rate) • Enteric nervous system (ENS) – involuntary sensory & motor neurons control GI tract – neurons function independently of ANS & CNS 12-5 Neurons • Functional unit of nervous system • Have capacity to produce action potentials – electrical excitability • Cell body • Cell processes = dendrites