Neural Projections from Nucleus Accumbens To
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Gene Expression of Prohormone and Proprotein Convertases in the Rat CNS: a Comparative in Situ Hybridization Analysis
The Journal of Neuroscience, March 1993. 73(3): 1258-1279 Gene Expression of Prohormone and Proprotein Convertases in the Rat CNS: A Comparative in situ Hybridization Analysis Martin K.-H. Schafer,i-a Robert Day,* William E. Cullinan,’ Michel Chri?tien,3 Nabil G. Seidah,* and Stanley J. Watson’ ‘Mental Health Research Institute, University of Michigan, Ann Arbor, Michigan 48109-0720 and J. A. DeSeve Laboratory of *Biochemical and 3Molecular Neuroendocrinology, Clinical Research Institute of Montreal, Montreal, Quebec, Canada H2W lR7 Posttranslational processing of proproteins and prohor- The participation of neuropeptides in the modulation of a va- mones is an essential step in the formation of bioactive riety of CNS functions is well established. Many neuropeptides peptides, which is of particular importance in the nervous are synthesized as inactive precursor proteins, which undergo system. Following a long search for the enzymes responsible an enzymatic cascade of posttranslational processing and mod- for protein precursor cleavage, a family of Kexin/subtilisin- ification events during their intracellular transport before the like convertases known as PCl, PC2, and furin have recently final bioactive products are secreted and act at either pre- or been characterized in mammalian species. Their presence postsynaptic receptors. Initial endoproteolytic cleavage occurs in endocrine and neuroendocrine tissues has been dem- C-terminal to pairs of basic amino acids such as lysine-arginine onstrated. This study examines the mRNA distribution of (Docherty and Steiner, 1982) and is followed by the removal these convertases in the rat CNS and compares their ex- of the basic residues by exopeptidases. Further modifications pression with the previously characterized processing en- can occur in the form of N-terminal acetylation or C-terminal zymes carboxypeptidase E (CPE) and peptidylglycine a-am- amidation, which is essential for the bioactivity of many neu- idating monooxygenase (PAM) using in situ hybridization ropeptides. -
Imaging of the Confused Patient: Toxic Metabolic Disorders Dara G
Imaging of the Confused Patient: Toxic Metabolic Disorders Dara G. Jamieson, M.D. Weill Cornell Medicine, New York, NY The patient who presents with either acute or subacute confusion, in the absence of a clearly defined speech disorder and focality on neurological examination that would indicate an underlying mass lesion, needs to be evaluated for a multitude of neurological conditions. Many of the conditions that produce the recent onset of alteration in mental status, that ranges from mild confusion to florid delirium, may be due to infectious or inflammatory conditions that warrant acute intervention such as antimicrobial drugs, steroids or plasma exchange. However, some patients with recent onset of confusion have an underlying toxic-metabolic disorders indicating a specific diagnosis with need for appropriate treatment. The clinical presentations of some patients may indicate the diagnosis (e.g. hypoglycemia, chronic alcoholism) while the imaging patterns must be recognized to make the diagnosis in other patients. Toxic-metabolic disorders constitute a group of diseases and syndromes with diverse causes and clinical presentations. Many toxic-metabolic disorders have no specific neuroimaging correlates, either at early clinical stages or when florid symptoms develop. However, some toxic-metabolic disorders have characteristic abnormalities on neuroimaging, as certain areas of the central nervous system appear particularly vulnerable to specific toxins and metabolic perturbations. Areas of particular vulnerability in the brain include: 1) areas of high-oxygen demand (e.g. basal ganglia, cerebellum, hippocampus), 2) the cerebral white matter and 3) the mid-brain. Brain areas of high-oxygen demand are particularly vulnerable to toxins that interfere with cellular respiratory metabolism. -
The Claustrum: Three-Dimensional Reconstruction, Photorealistic Imaging, and Stereotactic Approach
Folia Morphol. Vol. 70, No. 4, pp. 228–234 Copyright © 2011 Via Medica O R I G I N A L A R T I C L E ISSN 0015–5659 www.fm.viamedica.pl The claustrum: three-dimensional reconstruction, photorealistic imaging, and stereotactic approach S. Kapakin Department of Anatomy, Faculty of Medicine, Atatürk University, Erzurum, Turkey [Received 7 July 2011; Accepted 25 September 2011] The purpose of this study was to reveal the computer-aided three-dimensional (3D) appearance, the dimensions, and neighbourly relations of the claustrum and make a stereotactic approach to it by using serial sections taken from the brain of a human cadaver. The Snake technique was used to carry out 3D reconstructions of the claustra and surrounding structures. The photorealistic imaging and stereo- tactic approach were rendered by using the Advanced Render Module in Cinema 4D software. The claustrum takes the form of the concavity of the insular cortex and the convexity of the putamen. The inferior border of the claustrum is at about the same level as the bottom edge of the insular cortex and the putamen, but the superior border of the claustrum is at a lower level than the upper edge of the insular cortex and the putamen. The volume of the right claustrum, in the dimen- sions of 35.5710 mm ¥ 1.0912 mm ¥ 16.0000 mm, was 828.8346 mm3, and the volume of the left claustrum, in the dimensions of 32.9558 mm ¥ 0.8321 mm ¥ ¥ 19.0000 mm, was 705.8160 mm3. The surface areas of the right and left claustra were calculated to be 1551.149697 mm2 and 1439.156450 mm2 by using Surf- driver software. -
Motor Systems Basal Ganglia
Motor systems 409 Basal Ganglia You have just read about the different motor-related cortical areas. Premotor areas are involved in planning, while MI is involved in execution. What you don’t know is that the cortical areas involved in movement control need “help” from other brain circuits in order to smoothly orchestrate motor behaviors. One of these circuits involves a group of structures deep in the brain called the basal ganglia. While their exact motor function is still debated, the basal ganglia clearly regulate movement. Without information from the basal ganglia, the cortex is unable to properly direct motor control, and the deficits seen in Parkinson’s and Huntington’s disease and related movement disorders become apparent. Let’s start with the anatomy of the basal ganglia. The important “players” are identified in the adjacent figure. The caudate and putamen have similar functions, and we will consider them as one in this discussion. Together the caudate and putamen are called the neostriatum or simply striatum. All input to the basal ganglia circuit comes via the striatum. This input comes mainly from motor cortical areas. Notice that the caudate (L. tail) appears twice in many frontal brain sections. This is because the caudate curves around with the lateral ventricle. The head of the caudate is most anterior. It gives rise to a body whose “tail” extends with the ventricle into the temporal lobe (the “ball” at the end of the tail is the amygdala, whose limbic functions you will learn about later). Medial to the putamen is the globus pallidus (GP). -
A Comparative Analysis of the Distribution of Immunoreactive Orexin a and B in the Brains of Nocturnal and Diurnal Rodents Joshua P Nixon*1,2 and Laura Smale1
Behavioral and Brain Functions BioMed Central Research Open Access A comparative analysis of the distribution of immunoreactive orexin A and B in the brains of nocturnal and diurnal rodents Joshua P Nixon*1,2 and Laura Smale1 Address: 1Department of Zoology, Michigan State University, 203 Natural Science Building, East Lansing, MI 48824-1115 USA and 2Department of Food Science and Nutrition and Minnesota Craniofacial Research Training Program (MinnCResT), 17-164 Moos Tower, 515 Delaware St. SE, Minneapolis, MN 55455-0357 USA Email: Joshua P Nixon* - [email protected]; Laura Smale - [email protected] * Corresponding author Published: 13 June 2007 Received: 19 November 2006 Accepted: 13 June 2007 Behavioral and Brain Functions 2007, 3:28 doi:10.1186/1744-9081-3-28 This article is available from: http://www.behavioralandbrainfunctions.com/content/3/1/28 © 2007 Nixon and Smale; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Background: The orexins (hypocretins) are a family of peptides found primarily in neurons in the lateral hypothalamus. Although the orexinergic system is generally thought to be the same across species, the orexins are involved in behaviors which show considerable interspecific variability. There are few direct cross-species comparisons of the distributions of cells and fibers containing these peptides. Here, we addressed the possibility that there might be important species differences by systematically examining and directly comparing the distribution of orexinergic neurons and fibers within the forebrains of species with very different patterns of sleep-wake behavior. -
New Roles for the External Globus Pallidus in Basal Ganglia Circuits and Behavior
15178 • The Journal of Neuroscience, November 12, 2014 • 34(46):15178–15183 Symposium New Roles for the External Globus Pallidus in Basal Ganglia Circuits and Behavior X Aryn H. Gittis,1,2 XJoshua D. Berke,3 Mark D. Bevan,4 C. Savio Chan,4 Nicolas Mallet,5 XMichelle M. Morrow,6,7 and Robert Schmidt8 1Department of Biological Sciences and 2Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, 3Department of Psychology, Department of Biomedical Engineering, and Neuroscience Program, University of Michigan, Ann Arbor, Michigan 48109, 4Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 48109, 5Institut des maladies neurode´ge´ne´ratives, CNRS UMR 5293, Universite´ de Bordeaux, 33076 Bordeaux, France, 6Center for the Neural Basis of Cognition and 7Systems Neuroscience Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, and 8BrainLinks-BrainTools, Bernstein Center Freiburg, University of Freiburg, Freiburg 79085, Germany The development of methodology to identify specific cell populations and circuits within the basal ganglia is rapidly transforming our ability to understand the function of this complex circuit. This mini-symposium highlights recent advances in delineating the organiza- tion and function of neural circuits in the external segment of the globus pallidus (GPe). Although long considered a homogeneous structure in the motor-suppressing “indirect-pathway,” the GPe consists of a number of distinct cell types and anatomical subdomains that contribute differentially to both motor and nonmotor features of behavior. Here, we integrate recent studies using techniques, such as viral tracing, transgenic mice, electrophysiology, and behavioral approaches, to create a revised framework for understanding how the GPe relates to behavior in both health and disease. -
The External Pallidum: Think Locally, Act Globally
The external pallidum: think locally, act globally Connor D. Courtney, Arin Pamukcu, C. Savio Chan Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA Correspondence should be addressed to C. Savio Chan, Department of Physiology, Feinberg School of Medicine, Northwestern University, 303 East Chicago Avenue, Chicago, IL 60611. [email protected] Running title: GPe neuron diversity & function Keywords: cellular diversity, synaptic connectivity, motor control, Parkinson’s disease Main text: 5789 words Text boxes: 997 words Acknowledgments We thank past and current members of the Chan Lab for their creativity and dedication to our understanding of the pallidum. This work was supported by NIH R01 NS069777 (CSC), R01 MH112768 (CSC), R01 NS097901 (CSC), R01 MH109466 (CSC), R01 NS088528 (CSC), and T32 AG020506 (AP). Abstract (117 words) The globus pallidus (GPe), as part of the basal ganglia, was once described as a black box. As its functions were unclear, the GPe has been underappreciated for decades. The advent of molecular tools has sparked a resurgence in interest in the GPe. A recent flurry of publications has unveiled the molecular landscape, synaptic organization, and functions of the GPe. It is now clear that the GPe plays multifaceted roles in both motor and non-motor functions, and is critically implicated in several motor disorders. Accordingly, the GPe should no longer be considered as a mere homogeneous relay within the so-called ‘indirect pathway’. Here we summarize the key findings, challenges, consensuses, and disputes from the past few years. Introduction (437 words) Our ability to move is essential to survival. We and other animals produce a rich repertoire of body movements in response to internal and external cues, requiring choreographed activity across a number of brain structures. -
Diencephalon Diencephalon
Diencephalon Diencephalon • Thalamus dorsal thalamus • Hypothalamus pituitary gland • Epithalamus habenular nucleus and commissure pineal gland • Subthalamus ventral thalamus subthalamic nucleus (STN) field of Forel Diencephalon dorsal surface Diencephalon ventral surface Diencephalon Medial Surface THALAMUS Function of the Thalamus • Sensory relay – ALL sensory information (except smell) • Motor integration – Input from cortex, cerebellum and basal ganglia • Arousal – Part of reticular activating system • Pain modulation – All nociceptive information • Memory & behavior – Lesions are disruptive Classification of Thalamic Nuclei I. Lateral Nuclear Group II. Medial Nuclear Group III. Anterior Nuclear Group IV. Posterior Nuclear Group V. Metathalamic Nuclear Group VI. Intralaminar Nuclear Group VII. Thalamic Reticular Nucleus Classification of Thalamic Nuclei LATERAL NUCLEAR GROUP Ventral Nuclear Group Ventral Posterior Nucleus (VP) ventral posterolateral nucleus (VPL) ventral posteromedial nucleus (VPM) Input to the Thalamus Sensory relay - Ventral posterior group all sensation from body and head, including pain Projections from the Thalamus Sensory relay Ventral posterior group all sensation from body and head, including pain LATERAL NUCLEAR GROUP Ventral Lateral Nucleus Ventral Anterior Nucleus Input to the Thalamus Motor control and integration Projections from the Thalamus Motor control and integration LATERAL NUCLEAR GROUP Prefrontal SMA MI, PM SI Ventral Nuclear Group SNr TTT GPi Cbll ML, STT Lateral Dorsal Nuclear Group Lateral -
Amygdaloid and Basal Forebrain Direct Connections with the Nucleus of the Solitary Tract and the Dorsal Motor Nucleus
0270~6474/82/0210-1424$02.00/O The Journal of Neuroscience Copyright 0 Society for Neuroscience Vol. 2, No. 10, pp. 1424-1438 Printed in U.S.A. October 1982 AMYGDALOID AND BASAL FOREBRAIN DIRECT CONNECTIONS WITH THE NUCLEUS OF THE SOLITARY TRACT AND THE DORSAL MOTOR NUCLEUS JAMES S. SCHWABER,2 BRUCE S. KAPP,* GERALD A. HIGGINS, AND PETER R. RAPP Departments of Anatomy and Neurobiology and of *Psychology, College of Medicine, University of Vermont, Burlington, Vermont 05405 Received August 3, 1981; Revised May 3, 1982; Accepted May 13, 1982 Abstract Although the amygdala complex has long been known to exert a profound influence on cardiovas- cular activity, the neuronal and connectional substrate mediating these influences remains unclear. This paper describes a direct amygdaloid projection to medullary sensory and motor structures involved in cardiovascular regulation, the nucleus of the solitary tract (NTS) and the dorsal motor nucleus (DVN), by the use of autoradiographic anterograde transport and retrograde horseradish peroxidase (HRP) techniques in rabbits. Since all of these structures are highly heterogeneous structurally and functionally, details of the specific areas of the neuronal origin and efferent distribution of the projection were examined in relation to these features and with reference to a cytoarchitectonic description of the relevant forebrain regions in the rabbit. Amygdaloid projections to the NTS and DVN, as determined from HRP experiments, arise from an extensive population of neurons concentrated exclusively within the ipsilateral central nucleus and confined to and distrib- uted throughout a large medial subdivision of this nucleus. Projection neurons, however, also distribute without apparent interruption beyond the amygdala dorsomedially into the sublenticular substantia innominata and the lateral part of the bed nucleus of the stria terminalis and thus delineate a single entity of possible anatomical unity across all three structures, extending rostro- caudally within the basal forebrain as a diagonal band. -
Reduced Signal Intensity on MR Images of Thalamus and Putamen in Multiple Sclerosis: Increased Iron Content?
413 Reduced Signal Intensity on MR Images of Thalamus and Putamen in Multiple Sclerosis: Increased Iron Content? l 3 Burton Drayer - High-field-strength (1.5-T) MR imaging was used to evaluate 47 patients with definite Peter Burger4 multiple sclerosis and 42 neurologically normal control patients. Abnormal, multiple foci Barrie Hurwitz2 of increased signal intensity on T2-wei hted ima !tS.,JDOsLpr.ominent.in--the...periv.e tric Deborah Dawson5 u lIrWffi e matter, were apparent in 43 of 47 MS patients and in two of 42 control John Cain1 patients. previously undescribed finding of relatively. {b!creased signal intens.i.t¥Jn.os evident in th~ ~ anq thalam s on T2-weighted images was seen in 25 of 42 ~ pa len s an corre ated It - tlieaegree of white-matter abn r ali . In the normal control patients a rominently decreased signal intensity was noted in the 9iOi>U'S pallidus, as comP-M,e.cLwi.tILtiuLputamen or thalamus, correlating closely with the distribution of ferric iron as determined in normal Perls'-stained autopsy brains. The 'decreased signa intensity (decreased T2) is due to ferritin, which causes local magnetic field inhomogeneities and is proportional to the square of the field strength. The ~-~ decreased T2 in the thalamus and striatum in MS may be related to abnQ.UD.a./ly~s_e..cl':: . iron accumulation in these locales with the underlying mechanism remaini .sp.e.culati.v.e..... MR imaging has become the primary imaging technique for the diagnosis of multiple sclerosis (MS) [1 , 2]. The basic MR abnormality, an increase in signal intensity on a T2-weighted image, results from an increase in mobile protons from either edema, gliosis, or neutral sudanophilic lipid (cholesterol esters and triglycer ides) accumulation [3]. -
Projections of the Paraventricular and Paratenial Nuclei of the Dorsal Midline Thalamus in the Rat
THE JOURNAL OF COMPARATIVE NEUROLOGY 508:212–237 (2008) Projections of the Paraventricular and Paratenial Nuclei of the Dorsal Midline Thalamus in the Rat ROBERT P. VERTES* AND WALTER B. HOOVER Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton, Florida 33431 ABSTRACT The paraventricular (PV) and paratenial (PT) nuclei are prominent cell groups of the midline thalamus. To our knowledge, only a single early report has examined PV projections and no previous study has comprehensively analyzed PT projections. By using the antero- grade anatomical tracer, Phaseolus vulgaris leucoagglutinin, and the retrograde tracer, FluoroGold, we examined the efferent projections of PV and PT. We showed that the output of PV is virtually directed to a discrete set of limbic forebrain structures, including ‘limbic’ regions of the cortex. These include the infralimbic, prelimbic, dorsal agranular insular, and entorhinal cortices, the ventral subiculum of the hippocampus, dorsal tenia tecta, claustrum, lateral septum, dorsal striatum, nucleus accumbens (core and shell), olfactory tubercle, bed nucleus of stria terminalis (BST), medial, central, cortical, and basal nuclei of amygdala, and the suprachiasmatic, arcuate, and dorsomedial nuclei of the hypothalamus. The posterior PV distributes more heavily than the anterior PV to the dorsal striatum and to the central and basal nuclei of amygdala. PT projections significantly overlap with those of PV, with some important differences. PT distributes less heavily than PV to BST and to the amygdala, but much more densely to the medial prefrontal and entorhinal cortices and to the ventral subiculum of hippocampus. As described herein, PV/PT receive a vast array of afferents from the brainstem, hypothalamus, and limbic forebrain, related to arousal and attentive states of the animal, and would appear to channel that information to structures of the limbic forebrain in the selection of appropriate responses to changing environmental conditions. -
A Central Amygdala-Globus Pallidus Circuit Conveys Unconditioned Stimulus Information 2 and Controls Fear Learning
bioRxiv preprint doi: https://doi.org/10.1101/2020.04.28.066753; this version posted April 30, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. 1 A central amygdala-globus pallidus circuit conveys unconditioned stimulus information 2 and controls fear learning 3 4 Jacqueline Giovanniello1,2, Kai Yu2 *, Alessandro Furlan2 *, Gregory Thomas Nachtrab3, 5 Radhashree Sharma2, Xiaoke Chen3, Bo Li1,2 # 6 7 1. Watson School of Biological Sciences, Cold Spring Harbor Laboratory, Cold Spring Harbor, 8 NY 11724, USA 9 2. Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA 10 3. Department of Biology, Stanford University, CA 94305, USA 11 12 * These authors contributed equally 13 # Correspondence: [email protected] (B.L.) 14 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.04.28.066753; this version posted April 30, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. 15 Abstract 16 The central amygdala (CeA) is critically involved in a range of adaptive behaviors. In particular, 17 the somatostatin-expressing (Sst+) neurons in the CeA are essential for classic fear conditioning. 18 These neurons send long-range projections to several extra-amygdala targets, but the functions of 19 these projections remain elusive. Here, we found in mice that a subset of Sst+ CeA neurons send 20 projections to the globus pallidus external segment (GPe), and constitute essentially the entire 21 GPe-projecting CeA population.