1
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Fang LZ, Creed MC. Updating the striatal-pallidal wiring diagram. Nat Neurosci 2024; 27:15-27. [PMID: 38057614 DOI: 10.1038/s41593-023-01518-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 11/06/2023] [Indexed: 12/08/2023]
Abstract
The striatal and pallidal complexes are basal ganglia structures that orchestrate learning and execution of flexible behavior. Models of how the basal ganglia subserve these functions have evolved considerably, and the advent of optogenetic and molecular tools has shed light on the heterogeneity of subcircuits within these pathways. However, a synthesis of how molecularly diverse neurons integrate into existing models of basal ganglia function is lacking. Here, we provide an overview of the neurochemical and molecular diversity of striatal and pallidal neurons and synthesize recent circuit connectivity studies in rodents that takes this diversity into account. We also highlight anatomical organizational principles that distinguish the dorsal and ventral basal ganglia pathways in rodents. Future work integrating the molecular and anatomical properties of striatal and pallidal subpopulations may resolve controversies regarding basal ganglia network function.
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Affiliation(s)
- Lisa Z Fang
- Washington University Pain Center, Department of Anesthesiology, St. Louis, MO, USA
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John's, Newfoundland and Labrador, Canada
| | - Meaghan C Creed
- Washington University Pain Center, Department of Anesthesiology, St. Louis, MO, USA.
- Departments of Psychiatry, Neuroscience and Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA.
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2
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Lind EB, Sweis BM, Asp AJ, Esguerra M, Silvis KA, David Redish A, Thomas MJ. A quadruple dissociation of reward-related behaviour in mice across excitatory inputs to the nucleus accumbens shell. Commun Biol 2023; 6:119. [PMID: 36717646 PMCID: PMC9886947 DOI: 10.1038/s42003-023-04429-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 01/05/2023] [Indexed: 02/01/2023] Open
Abstract
The nucleus accumbens shell (NAcSh) is critically important for reward valuations, yet it remains unclear how valuation information is integrated in this region to drive behaviour during reinforcement learning. Using an optogenetic spatial self-stimulation task in mice, here we show that contingent activation of different excitatory inputs to the NAcSh change expression of different reward-related behaviours. Our data indicate that medial prefrontal inputs support place preference via repeated actions, ventral hippocampal inputs consistently promote place preferences, basolateral amygdala inputs produce modest place preferences but as a byproduct of increased sensitivity to time investments, and paraventricular inputs reduce place preferences yet do not produce full avoidance behaviour. These findings suggest that each excitatory input provides distinct information to the NAcSh, and we propose that this reflects the reinforcement of different credit assignment functions. Our finding of a quadruple dissociation of NAcSh input-specific behaviours provides insights into how types of information carried by distinct inputs to the NAcSh could be integrated to help drive reinforcement learning and situationally appropriate behavioural responses.
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Affiliation(s)
- Erin B Lind
- Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA
- Medical Discovery Team on Addiction, University of Minnesota, 3-432 McGuire Translational Research Facility, 2001 6th St SE, Minneapolis, MN, 55455, USA
| | - Brian M Sweis
- Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA
- Medical Discovery Team on Addiction, University of Minnesota, 3-432 McGuire Translational Research Facility, 2001 6th St SE, Minneapolis, MN, 55455, USA
- Department of Psychiatry, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Pl, New York, NY, 10029, USA
| | - Anders J Asp
- Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA
- Rehabilitation Medicine Research Center, Department of Physical Medicine and Rehabilitation, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA
| | - Manuel Esguerra
- Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA
- Medical Discovery Team on Addiction, University of Minnesota, 3-432 McGuire Translational Research Facility, 2001 6th St SE, Minneapolis, MN, 55455, USA
| | - Keelia A Silvis
- Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA
- Medical Discovery Team on Addiction, University of Minnesota, 3-432 McGuire Translational Research Facility, 2001 6th St SE, Minneapolis, MN, 55455, USA
| | - A David Redish
- Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA
- Medical Discovery Team on Addiction, University of Minnesota, 3-432 McGuire Translational Research Facility, 2001 6th St SE, Minneapolis, MN, 55455, USA
| | - Mark J Thomas
- Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA.
- Medical Discovery Team on Addiction, University of Minnesota, 3-432 McGuire Translational Research Facility, 2001 6th St SE, Minneapolis, MN, 55455, USA.
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3
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Connectivity Alterations in Vascular Parkinsonism: A Structural Covariance Study. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12147240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study aimed to investigate the structural covariance between the striatum and large-scale brain regions in patients with vascular parkinsonism (VP) compared to Parkinson’s disease (PD) and control subjects, and then explore the relationship between brain connectivity and the clinical features of our patients. Forty subjects (13 VP, 15 PD, and 12 age-and-sex-matched healthy controls) were enrolled in this study. They each underwent a careful clinical and neuropsychological evaluation, DAT-SPECT scintigraphy and 3T MRI scan. While there were no differences between PD and VP in the disease duration and severity, nor in terms of the DAT-SPECT evaluations, VP patients had a reduction in structural covariance between the bilateral corpus striatum (both putamen and caudate) and several brain regions, including the insula, thalamus, hippocampus, anterior cingulate cortex and orbito-frontal cortex compared to PD and controls. VP patients also showed lower scores on several neuropsychological tests. Interestingly, in the VP group, structural connectivity alterations were significantly related to cognitive evaluations exploring executive functions, memory, anxiety and depression. This compelling evidence suggests that structural disconnection in the basal ganglia circuits spreading in critical cortical regions may be involved in the pathophysiology of cognitive impairment in VP.
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4
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Kolpakova J, van der Vinne V, Giménez-Gómez P, Le T, You IJ, Zhao-Shea R, Velazquez-Marrero C, Tapper AR, Martin GE. Binge Alcohol Drinking Alters Synaptic Processing of Executive and Emotional Information in Core Nucleus Accumbens Medium Spiny Neurons. Front Cell Neurosci 2021; 15:742207. [PMID: 34867199 PMCID: PMC8635139 DOI: 10.3389/fncel.2021.742207] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 10/26/2021] [Indexed: 11/27/2022] Open
Abstract
The nucleus accumbens (NAc) is a forebrain region mediating the positive-reinforcing properties of drugs of abuse, including alcohol. It receives glutamatergic projections from multiple forebrain and limbic regions such as the prefrontal cortex (PFCx) and basolateral amygdala (BLA), respectively. However, it is unknown how NAc medium spiny neurons (MSNs) integrate PFCx and BLA inputs, and how this integration is affected by alcohol exposure. Because progress has been hampered by the inability to independently stimulate different pathways, we implemented a dual wavelength optogenetic approach to selectively and independently stimulate PFCx and BLA NAc inputs within the same brain slice. This approach functionally demonstrates that PFCx and BLA inputs synapse onto the same MSNs where they reciprocally inhibit each other pre-synaptically in a strict time-dependent manner. In alcohol-naïve mice, this temporal gating of BLA-inputs by PFCx afferents is stronger than the reverse, revealing that MSNs prioritize high-order executive processes information from the PFCx. Importantly, binge alcohol drinking alters this reciprocal inhibition by unilaterally strengthening BLA inhibition of PFCx inputs. In line with this observation, we demonstrate that in vivo optogenetic stimulation of the BLA, but not PFCx, blocks binge alcohol drinking escalation in mice. Overall, our results identify NAc MSNs as a key integrator of executive and emotional information and show that this integration is dysregulated during binge alcohol drinking.
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Affiliation(s)
- Jenya Kolpakova
- Department of Neurobiology, The Brudnick Neuropsychiatric Research Institute, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | | | - Pablo Giménez-Gómez
- Department of Neurobiology, The Brudnick Neuropsychiatric Research Institute, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - Timmy Le
- Department of Neurobiology, The Brudnick Neuropsychiatric Research Institute, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - In-Jee You
- Department of Neurobiology, The Brudnick Neuropsychiatric Research Institute, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - Rubing Zhao-Shea
- Department of Neurobiology, The Brudnick Neuropsychiatric Research Institute, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - Cristina Velazquez-Marrero
- Institute of Neurobiology, University of Puerto Rico Medical Sciences Campus, San Juan, PR, United States
| | - Andrew R Tapper
- Department of Neurobiology, The Brudnick Neuropsychiatric Research Institute, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - Gilles E Martin
- Department of Neurobiology, The Brudnick Neuropsychiatric Research Institute, University of Massachusetts Chan Medical School, Worcester, MA, United States
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5
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Xie S, Zhang X, Cheng W, Yang Z. Adolescent anxiety disorders and the developing brain: comparing neuroimaging findings in adolescents and adults. Gen Psychiatr 2021; 34:e100411. [PMID: 34423252 PMCID: PMC8340272 DOI: 10.1136/gpsych-2020-100411] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 06/21/2021] [Indexed: 02/07/2023] Open
Abstract
Adolescence is the peak period for the incidence of anxiety disorders. Recent findings have revealed the immaturity of neural networks underlying emotional regulation in this population. Brain vulnerability to anxiety in adolescence is related to the unsynchronised development of anxiety-relevant brain functional systems. However, our current knowledge on brain deficits in adolescent anxiety is mainly borrowed from studies on adults. Understanding adolescent-specific brain deficits is essential for developing biomarkers and brain-based therapies targeting adolescent anxiety. This article reviews and compares recent neuroimaging literature on anxiety-related brain structural and functional deficits between adolescent and adult populations, and proposes a model highlighting the differences between adolescence and adulthood in anxiety-related brain networks. This model emphasises that in adolescence the emotional control system tends to be hypoactivated, the fear conditioning system is immature, and the reward and stress response systems are hypersensitive. Furthermore, the striatum’s functional links to the amygdala and the prefrontal cortex are strengthened, while the link between the prefrontal cortex and the amygdala is weakened in adolescence. This model helps to explain why adolescents are vulnerable to anxiety disorders and provides insights into potential brain-based approaches to intervene in adolescent anxiety disorders.
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Affiliation(s)
- Shuqi Xie
- Laboratory of Psychological Health and Imaging, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaochen Zhang
- Laboratory of Psychological Health and Imaging, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenhong Cheng
- Department of Child and Adolescent Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Psychological Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhi Yang
- Laboratory of Psychological Health and Imaging, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Institute of Psychological and Behavioral Sciences, Shanghai Jiao Tong University, Shanghai, China
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6
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Christoffel DJ, Walsh JJ, Heifets BD, Hoerbelt P, Neuner S, Sun G, Ravikumar VK, Wu H, Halpern CH, Malenka RC. Input-specific modulation of murine nucleus accumbens differentially regulates hedonic feeding. Nat Commun 2021; 12:2135. [PMID: 33837200 PMCID: PMC8035198 DOI: 10.1038/s41467-021-22430-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/05/2021] [Indexed: 02/08/2023] Open
Abstract
Hedonic feeding is driven by the "pleasure" derived from consuming palatable food and occurs in the absence of metabolic need. It plays a critical role in the excessive feeding that underlies obesity. Compared to other pathological motivated behaviors, little is known about the neural circuit mechanisms mediating excessive hedonic feeding. Here, we show that modulation of prefrontal cortex (PFC) and anterior paraventricular thalamus (aPVT) excitatory inputs to the nucleus accumbens (NAc), a key node of reward circuitry, has opposing effects on high fat intake in mice. Prolonged high fat intake leads to input- and cell type-specific changes in synaptic strength. Modifying synaptic strength via plasticity protocols, either in an input-specific optogenetic or non-specific electrical manner, causes sustained changes in high fat intake. These results demonstrate that input-specific NAc circuit adaptations occur with repeated exposure to a potent natural reward and suggest that neuromodulatory interventions may be therapeutically useful for individuals with pathologic hedonic feeding.
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Affiliation(s)
- Daniel J Christoffel
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - Jessica J Walsh
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - Boris D Heifets
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Paul Hoerbelt
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - Sophie Neuner
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - Gordon Sun
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - Vinod K Ravikumar
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Hemmings Wu
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Casey H Halpern
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Robert C Malenka
- Nancy Pritzker Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA.
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7
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Wang J, Zhang Y, Zhang H, Wang K, Wang H, Qian D, Qi S, Yang K, Long H. Nucleus accumbens shell: A potential target for drug-resistant epilepsy with neuropsychiatric disorders. Epilepsy Res 2020; 164:106365. [PMID: 32460115 DOI: 10.1016/j.eplepsyres.2020.106365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/25/2020] [Accepted: 05/05/2020] [Indexed: 10/24/2022]
Abstract
The nucleus accumbens (NAc) is an important component of the ventral striatum, involving motivational and emotional processes, limbic-motor interfaces. Recently, experimental and clinical data have shown that NAc, particularly NAc shell (NAcs), participates in ictogenesis and epileptogensis in drug-resistant epilepsy (DRE). Therefore, we summarize the existing literature on NAcs and potential role in epilepsy, from the bench to the clinic. Connection abnormalities between NAcs and remainings, degeneration of NAc neurons, and an aberrant distribution of neuroactive substances have been reported in patients with DRE. These changes may be underlying the pathophysiological mechanism of the involvement of NAcs in DRE. Furthermore, alterations in NAcs may also be involved in neuropsychiatric disorders in patients with DRE. These observational studies demonstrate the multiple properties of NAcs and the complex relationship between the limbic system and DRE with neuropsychiatric disorders. NAcs can be a potential target for DBS and stereotactic lesioning to manage DRE with neuropsychiatric disorders. Future studies are warranted to further clarify the role of NAcs in epilepsy.
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Affiliation(s)
- Jun Wang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, China; The First Clinical Medicine College, Southern Medical University, China; Neural Networks Surgery Team, Southern Medical University, China.
| | - Yuzhen Zhang
- The First Clinical Medicine College, Southern Medical University, China; Neural Networks Surgery Team, Southern Medical University, China
| | - Henghui Zhang
- The First Clinical Medicine College, Southern Medical University, China; Neural Networks Surgery Team, Southern Medical University, China
| | - Kewan Wang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, China; The First Clinical Medicine College, Southern Medical University, China
| | - Hongxiao Wang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, China; The First Clinical Medicine College, Southern Medical University, China
| | - Dadi Qian
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, China; The First Clinical Medicine College, Southern Medical University, China
| | - Songtao Qi
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, China; The First Clinical Medicine College, Southern Medical University, China
| | - Kaijun Yang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, China; The First Clinical Medicine College, Southern Medical University, China.
| | - Hao Long
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, China; The First Clinical Medicine College, Southern Medical University, China.
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8
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Nucleus Accumbens Cell Type- and Input-Specific Suppression of Unproductive Reward Seeking. Cell Rep 2020; 30:3729-3742.e3. [DOI: 10.1016/j.celrep.2020.02.095] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 08/11/2019] [Accepted: 02/26/2020] [Indexed: 12/11/2022] Open
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9
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Synaptic Integration of Thalamic and Limbic Inputs in Rodent Gustatory Cortex. eNeuro 2020; 7:ENEURO.0199-19.2019. [PMID: 32019871 PMCID: PMC7029183 DOI: 10.1523/eneuro.0199-19.2019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 12/10/2019] [Accepted: 12/12/2019] [Indexed: 01/03/2023] Open
Abstract
Neurons in the gustatory cortex (GC) process multiple aspects of a tasting experience, encoding not only the physiochemical identity of tastes, but also their anticipation and hedonic value. Information pertaining to these stimulus features is relayed to GC via the gustatory thalamus (VPMpc) and basolateral amygdala (BLA). It is not known whether these inputs drive separate groups of neurons, thus activating separate channels of information, or are integrated by neurons that receive both afferents. Here, we used anterograde labeling and in vivo intracellular recordings in anesthetized rats to assess the potential convergence of BLA and VPMpc inputs in GC, and to investigate the dynamics of integration of these inputs. We report substantial anatomic overlap of BLA and VPMpc axonal fields across GC, and identify a population of GC neurons receiving converging BLA and VPMpc inputs. Our data show that BLA modulates the gain of VPMpc-evoked responses in a time-dependent fashion and that this modulation is dependent on the recruitment of synaptic inhibition by both BLA and VPMpc. Our results suggest that BLA shapes cortical processing of thalamic inputs by dynamically gating the excitatory/inhibitory balance of the GC circuit.
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10
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Piantadosi PT, Yeates DC, Floresco SB. Cooperative and dissociable involvement of the nucleus accumbens core and shell in the promotion and inhibition of actions during active and inhibitory avoidance. Neuropharmacology 2018; 138:57-71. [DOI: 10.1016/j.neuropharm.2018.05.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 05/07/2018] [Accepted: 05/21/2018] [Indexed: 11/28/2022]
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11
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Bueno-Junior LS, Leite JP. Input Convergence, Synaptic Plasticity and Functional Coupling Across Hippocampal-Prefrontal-Thalamic Circuits. Front Neural Circuits 2018; 12:40. [PMID: 29875637 PMCID: PMC5975431 DOI: 10.3389/fncir.2018.00040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/26/2018] [Indexed: 01/19/2023] Open
Abstract
Executive functions and working memory are long known to involve the prefrontal cortex (PFC), and two PFC-projecting areas: midline/paramidline thalamus (MLT) and cornus ammonis 1 (CA1)/subiculum of the hippocampal formation (HF). An increasing number of rodent electrophysiology studies are examining these substrates together, thus providing circuit-level perspectives on input convergence, synaptic plasticity and functional coupling, as well as insights into cognition mechanisms and brain disorders. Our review article puts this literature into a method-oriented narrative. As revisited throughout the text, limbic thalamic and hippocampal afferents to the PFC gate one another’s inputs, which in turn are modulated by PFC interneurons and ascending monoaminergic projections. In addition, long-term synaptic plasticity, paired-pulse facilitation (PPF), and event-related potentials (ERP) dynamically vary across PFC-related circuits during learning paradigms and drug effects. Finally, thalamic-prefrontal loops, which have been shown to amplify both cognitive processes and limbic seizures, are also being implicated as relays in the prefrontal-hippocampal feedback, contributing to spatial navigation and decision making. Based on these issues, we conclude the review with a critical synthesis and some research directions.
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Affiliation(s)
- Lezio S Bueno-Junior
- Department of Neuroscience and Behavioral Sciences, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Joao P Leite
- Department of Neuroscience and Behavioral Sciences, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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12
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Kappa Opioid Receptors Mediate Heterosynaptic Suppression of Hippocampal Inputs in the Rat Ventral Striatum. J Neurosci 2017. [PMID: 28642282 DOI: 10.1523/jneurosci.0876-17.2017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Kappa opioid receptors (KORs) are highly enriched within the ventral striatum (VS) and are thought to modulate striatal neurotransmission. This includes presynaptic inhibition of local glutamatergic release from excitatory inputs to the VS. However, it is not known which inputs drive this modulation and what impact they have on the local circuit dynamics within the VS. Individual medium spiny neurons (MSNs) within the VS serve as a site of convergence for glutamatergic inputs arising from the PFC and limbic regions, such as the hippocampus (HP). Recent data suggest that competition can arise between these inputs with robust cortical activation leading to a reduction in ongoing HP-evoked MSN responses. Here, we investigated the contribution of KOR signaling in PFC-driven heterosynaptic suppression of HP inputs onto MSNs using whole-cell patch-clamp recordings in slices from adult rats. Optogenetically evoked HP EPSPs were greatly attenuated after a short latency (50 ms) following burst-like PFC electrical stimulation, and the magnitude of this suppression was partially reversed following blockade of GABAARs (GABA Type A receptors), but not GABABRs (GABA Type B receptors). A similar reduction in suppression was observed in the presence of the KOR antagonist, norBNI. Combined blockade of local GABAARs and KORs resulted in complete blockade of PFC-induced heterosynaptic suppression of less salient HP inputs. These findings highlight a mechanism by which strong, transient PFC activity can take precedence over other excitatory inputs to the VS.SIGNIFICANCE STATEMENT Emerging evidence suggests that kappa opioid receptor (KOR) activation can selectively modulate striatal glutamatergic inputs onto medium spiny neurons (MSNs). In this study, we found that robust cortical stimulation leads to a reduction in ongoing hippocampal-evoked MSNs responses through the combined recruitment of local inhibitory mechanisms and activation of presynaptic KORs in the ventral striatum (VS). These processes are likely to facilitate the efficient transfer of cortical information through the VS during critical decision making by dampening competing information from less salient excitatory inputs. These data provide a novel mechanism through which VS information processing could influence decision making, a function thought to occur primarily in the PFC.
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13
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Dopamine Depletion Impairs Bilateral Sensory Processing in the Striatum in a Pathway-Dependent Manner. Neuron 2017; 94:855-865.e5. [DOI: 10.1016/j.neuron.2017.05.004] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 03/18/2017] [Accepted: 05/02/2017] [Indexed: 01/05/2023]
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14
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Silveira MM, Arnold JC, Laviolette SR, Hillard CJ, Celorrio M, Aymerich MS, Adams WK. Seeing through the smoke: Human and animal studies of cannabis use and endocannabinoid signalling in corticolimbic networks. Neurosci Biobehav Rev 2017; 76:380-395. [PMID: 27639448 PMCID: PMC5350061 DOI: 10.1016/j.neubiorev.2016.09.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 08/02/2016] [Accepted: 09/13/2016] [Indexed: 02/07/2023]
Abstract
Public opinion surrounding the recreational use and therapeutic potential of cannabis is shifting. This review describes new work examining the behavioural and neural effects of cannabis and the endocannabinoid system, highlighting key regions within corticolimbic brain circuits. First, we consider the role of human genetic factors and cannabis strain chemotypic differences in contributing to interindividual variation in the response to cannabinoids, such as THC, and review studies demonstrating that THC-induced impairments in decision-making processes are mediated by actions at prefrontal CB1 receptors. We further describe evidence that signalling through prefrontal or ventral hippocampal CB1 receptors modulates mesolimbic dopamine activity, aberrations of which may contribute to emotional processing deficits in schizophrenia. Lastly, we review studies suggesting that endocannabinoid tone in the amygdala is a critical regulator of anxiety, and report new data showing that FAAH activity is integral to this response. Together, these findings underscore the importance of cannabinoid signalling in the regulation of cognitive and affective behaviours, and encourage further research given their social, political, and therapeutic implications.
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Affiliation(s)
- Mason M Silveira
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.
| | - Jonathon C Arnold
- The Brain and Mind Centre and Discipline of Pharmacology, University of Sydney, Sydney, NSW, Australia
| | - Steven R Laviolette
- Addiction Research Group and Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON, Canada
| | - Cecilia J Hillard
- Department of Pharmacology and Toxicology, Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Marta Celorrio
- Program of Neurosciences, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona 31008, Spain; Department of Biochemistry and Genetics, School of Science, University of Navarra, Pamplona 31008, Spain
| | - María S Aymerich
- Program of Neurosciences, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona 31008, Spain; Department of Biochemistry and Genetics, School of Science, University of Navarra, Pamplona 31008, Spain; IdiSNA, Navarra Institute for Health Research, Pamplona 31008, Spain
| | - Wendy K Adams
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.
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15
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Contributions of basolateral amygdala and nucleus accumbens subregions to mediating motivational conflict during punished reward-seeking. Neurobiol Learn Mem 2017; 140:92-105. [DOI: 10.1016/j.nlm.2017.02.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/16/2017] [Accepted: 02/22/2017] [Indexed: 12/20/2022]
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16
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Effort-Based Reinforcement Processing and Functional Connectivity Underlying Amotivation in Medicated Patients with Depression and Schizophrenia. J Neurosci 2017; 37:4370-4380. [PMID: 28283562 DOI: 10.1523/jneurosci.2524-16.2017] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 02/25/2017] [Accepted: 02/28/2017] [Indexed: 11/21/2022] Open
Abstract
Amotivation is a common phenotype of major depressive disorder and schizophrenia, which are clinically distinct disorders. Effective treatment targets and strategies can be discovered by examining the dopaminergic reward network function underlying amotivation between these disorders. We conducted an fMRI study in healthy human participants and medicated patients with depression and schizophrenia using an effort-based reinforcement task. We examined regional activations related to reward type (positive and negative reinforcement), effort level, and their composite value, as well as resting-state functional connectivities within the meso-striatal-prefrontal pathway. We found that integrated reward and effort values of low effort-positive reinforcement and high effort-negative reinforcement were behaviorally anticipated and represented in the putamen and medial orbitofrontal cortex activities. Patients with schizophrenia and depression did not show anticipation-related and work-related reaction time reductions, respectively. Greater amotivation severity correlated with smaller work-related putamen activity changes according to reward type in schizophrenia and effort level in depression. Patients with schizophrenia showed feedback-related putamen hyperactivity of low effort compared with healthy controls and depressed patients. The strength of medial orbitofrontal-striatal functional connectivity predicted work-related reaction time reduction of high effort negative reinforcement in healthy controls and amotivation severity in both patients with schizophrenia and those with depression. Patients with depression showed deficient medial orbitofrontal-striatal functional connectivity compared with healthy controls and patients with schizophrenia. These results indicate that amotivation in depression and schizophrenia involves different pathophysiology in the prefrontal-striatal circuitry.SIGNIFICANCE STATEMENT Amotivation is present in both depression and schizophrenia. However, treatment involves the use of drugs that enhance serotonin activity in depression and inhibit serotonin and dopamine activity in schizophrenia. Understanding how motivation processed in the mesocorticolimbic and nigostriatal pathways is affected in depression and schizophrenia is important in discovering treatment targets and strategies for amotivation. To our knowledge, this is the first study to compare patients with depression and schizophrenia in a common functional construct. By using an effort-based reinforcement task and examining resting-state functional connectivity in the dopaminergic network, we propose that difference in striato-orbitofrontal dysfunction in effort-based reinforcement between depression and schizophrenia may be related to differences in the extent of functional dysconnectivity in the dopaminergic pathway.
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Saedi Marghmaleki V, Alaei H. Effect of Treadmill Running on Morphine Dependence Before and After Medial Prefrontal Cortex Lesion in Rats. Asian J Sports Med 2017; 7:e35181. [PMID: 28144409 PMCID: PMC5259673 DOI: 10.5812/asjsm.35181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 04/05/2016] [Accepted: 04/13/2016] [Indexed: 11/29/2022] Open
Abstract
Background Previous studies on the medial prefrontal cortex (mPFC) has shown that this area plays an important role in addiction behavior. Other studies also indicated that exercise decreases use of morphine. Objectives The aim of this study was to evaluate the effects of short-term exercise on trends for use of morphine with an intact mPFC and lesion of that area. Methods 50 rats randomly were selected and divided into 5 groups. 1-exercise. 2- Morphine + Lesion. 3- Morphine + Exercise + Lesion. 4- Morphine. 5- Morphine and Exercise. All groups received morphine for 9 days except exercise group. On the 10th day, the symptoms of addiction were evaluated. To determine the effects of exercise, a treadmill apparatus was used for exercising. Results Our results indicated that exercise with intact mPFC area significantly decreased the tendency of using morphine which is verified by changes in symptoms (P < 0.05), but after a lesion of this area exercise did not significantly affect these withdrawal symptoms Conclusions It seems that a lesion of mPFC area significantly reduced the effect of short-term exercise on the usage pattern of morphine.
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Affiliation(s)
- Vajihe Saedi Marghmaleki
- Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran
| | - Hojjatallah Alaei
- Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran
- Corresponding author: Hojjatallah Alaei, Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran. Tel: +98-3137929007, Fax: +98-3136688597, E-mail:
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Mulej Bratec S, Xie X, Wang Y, Schilbach L, Zimmer C, Wohlschläger AM, Riedl V, Sorg C. Cognitive emotion regulation modulates the balance of competing influences on ventral striatal aversive prediction error signals. Neuroimage 2016; 147:650-657. [PMID: 28040541 DOI: 10.1016/j.neuroimage.2016.12.078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 12/02/2016] [Accepted: 12/28/2016] [Indexed: 11/25/2022] Open
Abstract
Cognitive emotion regulation (CER) is a critical human ability to face aversive emotional stimuli in a flexible way, via recruitment of specific prefrontal brain circuits. Animal research reveals a central role of ventral striatum in emotional behavior, for both aversive conditioning, with striatum signaling aversive prediction errors (aPE), and for integrating competing influences of distinct striatal inputs from regions such as the prefrontal cortex (PFC), amygdala, hippocampus and ventral tegmental area (VTA). Translating these ventral striatal findings from animal research to human CER, we hypothesized that successful CER would affect the balance of competing influences of striatal afferents on striatal aPE signals, in a way favoring PFC as opposed to 'subcortical' (i.e., non-isocortical) striatal inputs. Using aversive Pavlovian conditioning with and without CER during fMRI, we found that during CER, superior regulators indeed reduced the modulatory impact of 'subcortical' striatal afferents (hippocampus, amygdala and VTA) on ventral striatal aPE signals, while keeping the PFC impact intact. In contrast, inferior regulators showed an opposite pattern. Our results demonstrate that ventral striatal aPE signals and associated competing modulatory inputs are critical mechanisms underlying successful cognitive regulation of aversive emotions in humans.
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Affiliation(s)
- Satja Mulej Bratec
- Klinikum rechts der Isar, Technische Universität München, Department of Neuroradiology, Munich 81675, Germany; Klinikum rechts der Isar, Technische Universität München, TUM-NIC Neuroimaging Center, Munich 81675, Germany; Ludwig-Maximilians-Universität München, Graduate School of Systemic Neurosciences, Planegg-Martinsried 82152, Germany
| | - Xiyao Xie
- Klinikum rechts der Isar, Technische Universität München, Department of Neuroradiology, Munich 81675, Germany; Klinikum rechts der Isar, Technische Universität München, TUM-NIC Neuroimaging Center, Munich 81675, Germany; Ludwig-Maximilians-Universität München, Department of Psychology, Munich 80802, Germany
| | - Yijun Wang
- Klinikum rechts der Isar, Technische Universität München, TUM-NIC Neuroimaging Center, Munich 81675, Germany; Duke-NUS Graduate Medical School Singapore, Singapore 169857, Singapore
| | - Leonhard Schilbach
- Max Planck Institute of Psychiatry, Independent Max Planck Research Group Social Neuroscience, Munich 80804, Germany; University Hospital of Cologne, Department of Psychiatry, Cologne 50924, Germany
| | - Claus Zimmer
- Klinikum rechts der Isar, Technische Universität München, Department of Neuroradiology, Munich 81675, Germany
| | - Afra M Wohlschläger
- Klinikum rechts der Isar, Technische Universität München, Department of Neuroradiology, Munich 81675, Germany; Klinikum rechts der Isar, Technische Universität München, TUM-NIC Neuroimaging Center, Munich 81675, Germany
| | - Valentin Riedl
- Klinikum rechts der Isar, Technische Universität München, Department of Neuroradiology, Munich 81675, Germany; Klinikum rechts der Isar, Technische Universität München, TUM-NIC Neuroimaging Center, Munich 81675, Germany; Klinikum rechts der Isar, Technische Universität München, Department of Nuclear Medicine, Munich 81675, Germany
| | - Christian Sorg
- Klinikum rechts der Isar, Technische Universität München, Department of Neuroradiology, Munich 81675, Germany; Klinikum rechts der Isar, Technische Universität München, TUM-NIC Neuroimaging Center, Munich 81675, Germany; Klinikum rechts der Isar, Technische Universität München, Department of Psychiatry, Munich 81675, Germany.
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Reig R, Silberberg G. Distinct Corticostriatal and Intracortical Pathways Mediate Bilateral Sensory Responses in the Striatum. Cereb Cortex 2016; 26:4405-4415. [PMID: 27664965 PMCID: PMC5193142 DOI: 10.1093/cercor/bhw268] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 08/04/2016] [Accepted: 08/04/2016] [Indexed: 01/13/2023] Open
Abstract
Individual striatal neurons integrate somatosensory information from both sides of the body, however, the afferent pathways mediating these bilateral responses are unclear. Whereas ipsilateral corticostriatal projections are prevalent throughout the neocortex, contralateral projections provide sparse input from primary sensory cortices, in contrast to the dense innervation from motor and frontal regions. There is, therefore, an apparent discrepancy between the observed anatomical pathways and the recorded striatal responses. We used simultaneous in vivo whole-cell and extracellular recordings combined with focal cortical silencing, to dissect the afferent pathways underlying bilateral sensory integration in the mouse striatum. We show that unlike direct corticostriatal projections mediating responses to contralateral whisker deflection, responses to ipsilateral stimuli are mediated mainly by intracortical projections from the contralateral somatosensory cortex (S1). The dominant pathway is the callosal projection from contralateral to ipsilateral S1. Our results suggest a functional difference between the cortico-basal ganglia pathways underlying bilateral sensory and motor processes.
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Affiliation(s)
- Ramon Reig
- Department of Neuroscience, Karolinska Institute, Stockholm 17177, Sweden
| | - Gilad Silberberg
- Department of Neuroscience, Karolinska Institute, Stockholm 17177, Sweden
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20
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McGlinchey EM, James MH, Mahler SV, Pantazis C, Aston-Jones G. Prelimbic to Accumbens Core Pathway Is Recruited in a Dopamine-Dependent Manner to Drive Cued Reinstatement of Cocaine Seeking. J Neurosci 2016; 36:8700-11. [PMID: 27535915 PMCID: PMC4987439 DOI: 10.1523/jneurosci.1291-15.2016] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 06/27/2016] [Accepted: 06/30/2016] [Indexed: 12/22/2022] Open
Abstract
UNLABELLED Glutamate inputs to nucleus accumbens (NAc) facilitate conditioned drug-seeking behavior and primarily originate from medial prefrontal cortex (mPFC), basolateral amygdala (BLA), and ventral subiculum of the hippocampus (vSub). These regions express Fos (a marker of neural activity) during cue-induced reinstatement of cocaine seeking, but only subpopulations of neurons within these regions drive drug seeking. One way to identify and functionally distinguish neural subpopulations activated during drug-seeking is to examine their projection targets. In rats, we examined Fos expression during cue-induced reinstatement of cocaine- and sucrose-seeking in prelimbic cortex (PL), infralimbic cortex (IL), BLA, and vSub neurons that project to NAc core (NAcC) or NAc shell (NAcSh). Neurons in PL, BLA, and vSub that project to NAcC, but not NAcSh, expressed Fos during cue-induced cocaine seeking, but not sucrose seeking. However, only activation of the PL-NAcC pathway positively correlated with cocaine reinstatement behavior, unlike BLA or vSub inputs to NAcC. To confirm a functional role for the PL-NAcC pathway, and to test the hypothesis that this pathway is recruited in a dopamine-dependent manner, we used a pharmacological disconnection approach whereby dopamine signaling was blocked in PL and glutamate signaling was blocked in the contralateral NAcC. This disconnection attenuated cue-induced reinstatement of cocaine seeking but had no effect on reinstatement of sucrose seeking. Our results highlight a role for the PL-NAcC pathway in cocaine seeking and show that these glutamatergic projections are recruited in a dopamine-dependent manner to drive reinstatement. SIGNIFICANCE STATEMENT Relapse represents a significant barrier to the successful treatment of cocaine addiction. Here, we characterize the relative activation of glutamatergic inputs to nucleus accumbens during cued reinstatement of cocaine seeking versus sucrose seeking. Prelimbic cortex (PL) projections to nucleus accumbens core (NAcC) uniquely expressed Fos in a manner that positively correlated with cocaine-seeking, but not sucrose-seeking, behavior. Additional functional experiments showed that the PL-NAcC pathway was recruited by drug-associated cues in a dopamine-dependent manner to drive cocaine-seeking, but not sucrose-seeking, behavior. These data highlight PL neurons that project to NAcC, and their regulation by dopamine, as potential targets for therapeutics designed to treat cocaine relapse that do not affect natural reward seeking.
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Affiliation(s)
- Ellen M McGlinchey
- Department of Neurosciences, Medical University of South Carolina, Charleston, South Carolina 29403, Brain Health Institute, Rutgers University and Rutgers Biomedical and Health Sciences, Piscataway, New Jersey 08854, and
| | - Morgan H James
- Brain Health Institute, Rutgers University and Rutgers Biomedical and Health Sciences, Piscataway, New Jersey 08854, and
| | - Stephen V Mahler
- Department of Neurosciences, Medical University of South Carolina, Charleston, South Carolina 29403, Department of Neurobiology and Behavior, University of California, Irvine, California 92697
| | - Caroline Pantazis
- Brain Health Institute, Rutgers University and Rutgers Biomedical and Health Sciences, Piscataway, New Jersey 08854, and
| | - Gary Aston-Jones
- Brain Health Institute, Rutgers University and Rutgers Biomedical and Health Sciences, Piscataway, New Jersey 08854, and
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21
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Stenner MP, Dürschmid S, Rutledge RB, Zaehle T, Schmitt FC, Kaufmann J, Voges J, Heinze HJ, Dolan RJ, Schoenfeld MA. Perimovement decrease of alpha/beta oscillations in the human nucleus accumbens. J Neurophysiol 2016; 116:1663-1672. [PMID: 27486103 PMCID: PMC5144692 DOI: 10.1152/jn.00142.2016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 07/09/2016] [Indexed: 11/23/2022] Open
Abstract
The present work clarifies how the nucleus accumbens contributes to action. This region is often assumed to influence behavior “off-line” by evaluating outcomes. Studying rare recordings of local field potentials from the human nucleus accumbens, we observe a perimovement decrease of alpha and beta oscillations in seven of eight individuals, a signal that, in the motor system, is directly related to action preparation. Our results support the idea of an online role of this region for imminent action. The human nucleus accumbens is thought to play an important role in guiding future action selection via an evaluation of current action outcomes. Here we provide electrophysiological evidence for a more direct, i.e., online, role during action preparation. We recorded local field potentials from the nucleus accumbens in patients with epilepsy undergoing surgery for deep brain stimulation. We found a consistent decrease in the power of alpha/beta oscillations (10–30 Hz) before and around the time of movements. This perimovement alpha/beta desynchronization was observed in seven of eight patients and was present both before instructed movements in a serial reaction time task as well as before self-paced, deliberate choices in a decision making task. A similar beta decrease over sensorimotor cortex and in the subthalamic nucleus has been directly related to movement preparation and execution. Our results support the idea of a direct role of the human nucleus accumbens in action preparation and execution.
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Affiliation(s)
- Max-Philipp Stenner
- Department of Neurology, Otto von Guericke University, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany;
| | - Stefan Dürschmid
- Department of Neurology, Otto von Guericke University, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany
| | - Robb B Rutledge
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Max Planck University College London Centre for Computational Psychiatry and Ageing Research, London, United Kingdom; and
| | - Tino Zaehle
- Department of Neurology, Otto von Guericke University, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany
| | | | - Jörn Kaufmann
- Department of Neurology, Otto von Guericke University, Magdeburg, Germany
| | - Jürgen Voges
- Department of Stereotactic Neurosurgery, Otto von Guericke University, Magdeburg, Germany
| | - Hans-Jochen Heinze
- Department of Neurology, Otto von Guericke University, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany
| | - Raymond J Dolan
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Max Planck University College London Centre for Computational Psychiatry and Ageing Research, London, United Kingdom; and
| | - Mircea Ariel Schoenfeld
- Department of Neurology, Otto von Guericke University, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany
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Brooks JM, O'Donnell P, Frost DO. Olanzapine Treatment of Adolescent Rats Alters Adult D2 Modulation of Cortical Inputs to the Ventral Striatum. Int J Neuropsychopharmacol 2016; 19:pyw034. [PMID: 27207908 PMCID: PMC5091821 DOI: 10.1093/ijnp/pyw034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 04/13/2016] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND The striatal dopamine system undergoes vast ontogenetic changes during adolescence, making the brain vulnerable to drug treatments that target this class of neurotransmitters. Atypical antipsychotic drugs are often prescribed to children and adolescents for off-label treatment of neuropsychiatric disorders, yet the long-term impact this treatment has on brain development remains largely unknown. METHODS Adolescent male rats were treated with olanzapine or vehicle for 3 weeks (during postnatal day 28-49) using a dosing condition designed to approximate closely D2 receptor occupancies in the human therapeutic range. We assessed D2 receptor modulation of corticostriatal inputs onto medium spiny neurons in the adult ventral striatum using in vitro whole-cell current clamp recordings. RESULTS The D2/D3 agonist quinpirole (5 µM) enhanced cortically driven medium spiny neuron synaptic responses in slices taken from adult rats treated with vehicle during adolescence, as in untreated adult rats. However, in slices from mature rats treated with olanzapine during adolescence, quinpirole reduced medium spiny neuron activation. The magnitude of decrease was similar to previous observations in untreated, prepubertal rats. These changes may reflect alterations in local inhibitory circuitry, as the GABA-A antagonist picrotoxin (100 µM) reversed the effects of quinpirole in vehicle-treated slices but had no impact on cortically evoked responses in olanzapine-treated slices. CONCLUSIONS These data suggest that adolescent atypical antipsychotic drug treatment leads to enduring changes in dopamine modulation of corticostriatal synaptic function.
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23
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Organization of Prefrontal-Striatal Connections. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/b978-0-12-802206-1.00021-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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24
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Calhoon GG, Tye KM. Resolving the neural circuits of anxiety. Nat Neurosci 2015; 18:1394-404. [PMID: 26404714 DOI: 10.1038/nn.4101] [Citation(s) in RCA: 423] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 07/30/2015] [Indexed: 12/12/2022]
Abstract
Although anxiety disorders represent a major societal problem demanding new therapeutic targets, these efforts have languished in the absence of a mechanistic understanding of this subjective emotional state. While it is impossible to know with certainty the subjective experience of a rodent, rodent models hold promise in dissecting well-conserved limbic circuits. The application of modern approaches in neuroscience has already begun to unmask the neural circuit intricacies underlying anxiety by allowing direct examination of hypotheses drawn from existing psychological concepts. This information points toward an updated conceptual model for what neural circuit perturbations could give rise to pathological anxiety and thereby provides a roadmap for future therapeutic development.
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Affiliation(s)
- Gwendolyn G Calhoon
- The Picower Institute for Learning and Memory, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Kay M Tye
- The Picower Institute for Learning and Memory, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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25
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Directed Communication between Nucleus Accumbens and Neocortex in Humans Is Differentially Supported by Synchronization in the Theta and Alpha Band. PLoS One 2015; 10:e0138685. [PMID: 26394404 PMCID: PMC4579059 DOI: 10.1371/journal.pone.0138685] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 09/02/2015] [Indexed: 01/01/2023] Open
Abstract
Here, we report evidence for oscillatory bi-directional interactions between the nucleus accumbens and the neocortex in humans. Six patients performed a demanding covert visual attention task while we simultaneously recorded brain activity from deep-brain electrodes implanted in the nucleus accumbens and the surface electroencephalogram (EEG). Both theta and alpha oscillations were strongly coherent with the frontal and parietal EEG during the task. Theta-band coherence increased during processing of the visual stimuli. Granger causality analysis revealed that the nucleus accumbens was communicating with the neocortex primarily in the theta-band, while the cortex was communicating the nucleus accumbens in the alpha-band. These data are consistent with a model, in which theta- and alpha-band oscillations serve dissociable roles: Prior to stimulus processing, the cortex might suppress ongoing processing in the nucleus accumbens by modulating alpha-band activity. Subsequently, upon stimulus presentation, theta oscillations might facilitate the active exchange of stimulus information from the nucleus accumbens to the cortex.
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26
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Escobar AP, Cornejo FA, Olivares-Costa M, González M, Fuentealba JA, Gysling K, España RA, Andrés ME. Reduced dopamine and glutamate neurotransmission in the nucleus accumbens of quinpirole-sensitized rats hints at inhibitory D2 autoreceptor function. J Neurochem 2015; 134:1081-90. [PMID: 26112331 DOI: 10.1111/jnc.13209] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Revised: 06/02/2015] [Accepted: 06/16/2015] [Indexed: 11/28/2022]
Abstract
Dopamine from the ventral tegmental area and glutamate from several brain nuclei converge in the nucleus accumbens (NAc) to drive motivated behaviors. Repeated activation of D2 receptors with quinpirole (QNP) induces locomotor sensitization and compulsive behaviors, but the mechanisms are unknown. In this study, in vivo microdialysis and fast scan cyclic voltammetry in adult anesthetized rats were used to investigate the effect of repeated QNP on dopamine and glutamate neurotransmission within the NAc. Following eight injections of QNP, a significant decrease in phasic and tonic dopamine release was observed in rats that displayed locomotor sensitization. Either a systemic injection or the infusion of QNP into the NAc decreased dopamine release, and the extent of this effect was similar in QNP-sensitized and control rats, indicating that inhibitory D2 autoreceptor function is maintained despite repeated activation of D2 receptors and decreased dopamine extracellular levels. Basal extracellular levels of glutamate in the NAc were also significantly lower in QNP-treated rats than in controls. Moreover, the increase in NAc glutamate release induced by direct stimulation of medial prefrontal cortex was significantly lower in QNP-sensitized rats. Together, these results indicate that repeated activation of D2 receptors disconnects NAc from medial prefrontal cortex and ventral tegmental area. Repeated administration of the dopamine D2 receptor agonist quinpirole (QNP) induces locomotor sensitization. We found that the NAc of QNP-sensitized rats has reduced glutamate levels coming from prefrontal cortex together with a decreased phasic and tonic dopamine neurotransmission but a conserved presynaptic D2 receptor function. We suggest that locomotor sensitization is because of increased affinity state of D2 post-synaptic receptors.
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Affiliation(s)
- Angélica P Escobar
- Millennium Science Nucleus in Stress and Addiction, Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Cellular and Molecular Biology, Faculty of Biological Science, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Francisca A Cornejo
- Millennium Science Nucleus in Stress and Addiction, Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Cellular and Molecular Biology, Faculty of Biological Science, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Montserrat Olivares-Costa
- Millennium Science Nucleus in Stress and Addiction, Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Cellular and Molecular Biology, Faculty of Biological Science, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Marcela González
- Millennium Science Nucleus in Stress and Addiction, Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Cellular and Molecular Biology, Faculty of Biological Science, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - José A Fuentealba
- Millennium Science Nucleus in Stress and Addiction, Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Pharmacy, Faculty of Chemistry, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Katia Gysling
- Millennium Science Nucleus in Stress and Addiction, Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Cellular and Molecular Biology, Faculty of Biological Science, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rodrigo A España
- Department Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - María E Andrés
- Millennium Science Nucleus in Stress and Addiction, Pontificia Universidad Católica de Chile, Santiago, Chile.,Department of Cellular and Molecular Biology, Faculty of Biological Science, Pontificia Universidad Católica de Chile, Santiago, Chile
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27
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Stenner MP, Rutledge RB, Zaehle T, Schmitt FC, Kopitzki K, Kowski AB, Voges J, Heinze HJ, Dolan RJ. No unified reward prediction error in local field potentials from the human nucleus accumbens: evidence from epilepsy patients. J Neurophysiol 2015; 114:781-92. [PMID: 26019312 PMCID: PMC4533060 DOI: 10.1152/jn.00260.2015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 05/26/2015] [Indexed: 11/22/2022] Open
Abstract
Functional magnetic resonance imaging (fMRI), cyclic voltammetry, and single-unit electrophysiology studies suggest that signals measured in the nucleus accumbens (Nacc) during value-based decision making represent reward prediction errors (RPEs), the difference between actual and predicted rewards. Here, we studied the precise temporal and spectral pattern of reward-related signals in the human Nacc. We recorded local field potentials (LFPs) from the Nacc of six epilepsy patients during an economic decision-making task. On each trial, patients decided whether to accept or reject a gamble with equal probabilities of a monetary gain or loss. The behavior of four patients was consistent with choices being guided by value expectations. Expected value signals before outcome onset were observed in three of those patients, at varying latencies and with nonoverlapping spectral patterns. Signals after outcome onset were correlated with RPE regressors in all subjects. However, further analysis revealed that these signals were better explained as outcome valence rather than RPE signals, with gamble gains and losses differing in the power of beta oscillations and in evoked response amplitudes. Taken together, our results do not support the idea that postsynaptic potentials in the Nacc represent a RPE that unifies outcome magnitude and prior value expectation. We discuss the generalizability of our findings to healthy individuals and the relation of our results to measurements of RPE signals obtained from the Nacc with other methods.
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Affiliation(s)
- Max-Philipp Stenner
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany;
| | - Robb B Rutledge
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Max Planck University College London Centre for Computational Psychiatry and Ageing Research, London, United Kingdom
| | - Tino Zaehle
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany
| | | | - Klaus Kopitzki
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
| | - Alexander B Kowski
- Epilepsy-Center Berlin-Brandenburg, Department of Neurology, Charité Universitätsmedizin, Berlin, Germany; and
| | - Jürgen Voges
- Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany; Department of Stereotactic Neurosurgery, Otto-von-Guericke University, Magdeburg, Germany
| | - Hans-Jochen Heinze
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany
| | - Raymond J Dolan
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Max Planck University College London Centre for Computational Psychiatry and Ageing Research, London, United Kingdom
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Mizumori SJY, Tryon VL. Integrative hippocampal and decision-making neurocircuitry during goal-relevant predictions and encoding. PROGRESS IN BRAIN RESEARCH 2015; 219:217-42. [PMID: 26072241 DOI: 10.1016/bs.pbr.2015.03.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
It has become clear that the hippocampus plays a critical role in the identification of new contexts and for the detection of changes in familiar contexts. The hippocampus accomplishes these goals through a continual process of comparing predicted features of a context or situation to those actually experienced. A mismatch between expected and experienced context expectations is thought to lead to the generation of a context prediction error (Mizumori, 2013) that functionally alerts connected brain areas to alter subsequent decision making and response selection. Little is understood about how hippocampal context analyses impact downstream decision processes. This issue is evaluated here first by comparing the nature of the information represented in hippocampus and decision-related midbrain-striatal structures, while rats perform a hippocampal-dependent spatial memory task in which rewards of different value are found at different locations. In contrast to place-specific and egocentric neural representations, neural representations of goal information are broadly distributed in hippocampal and decision neural circuitry, but they appear in different forms for different brain structures. It is suggested that further researching on how goal information processing occurs in hippocampus and decision neural circuitry may reveal insights into the nature of the interaction between memory and decision systems. The second part of this review describes neural pathways by which hippocampal context information might arrive within the decision circuit. The third section presents a hypothesis that the nature of the interactions between hippocampal and midbrain-striatal circuitry is regulated by the prefrontal cortex.
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Affiliation(s)
| | - Valerie L Tryon
- Psychology Department, University of Washington, Seattle, WA, USA
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Stenner MP, Litvak V, Rutledge RB, Zaehle T, Schmitt FC, Voges J, Heinze HJ, Dolan RJ. Cortical drive of low-frequency oscillations in the human nucleus accumbens during action selection. J Neurophysiol 2015; 114:29-39. [PMID: 25878159 PMCID: PMC4518721 DOI: 10.1152/jn.00988.2014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 04/09/2015] [Indexed: 11/24/2022] Open
Abstract
The nucleus accumbens is thought to contribute to action selection by integrating behaviorally relevant information from multiple regions, including prefrontal cortex. Studies in rodents suggest that information flow to the nucleus accumbens may be regulated via task-dependent oscillatory coupling between regions. During instrumental behavior, local field potentials (LFP) in the rat nucleus accumbens and prefrontal cortex are coupled at delta frequencies (Gruber AJ, Hussain RJ, O'Donnell P. PLoS One 4: e5062, 2009), possibly mediating suppression of afferent input from other areas and thereby supporting cortical control (Calhoon GG, O'Donnell P. Neuron 78: 181–190, 2013). In this report, we demonstrate low-frequency cortico-accumbens coupling in humans, both at rest and during a decision-making task. We recorded LFP from the nucleus accumbens in six epilepsy patients who underwent implantation of deep brain stimulation electrodes. All patients showed significant coherence and phase-synchronization between LFP and surface EEG at delta and low theta frequencies. Although the direction of this coupling as indexed by Granger causality varied between subjects in the resting-state data, all patients showed a cortical drive of the nucleus accumbens during action selection in a decision-making task. In three patients this was accompanied by a significant coherence increase over baseline. Our results suggest that low-frequency cortico-accumbens coupling represents a highly conserved regulatory mechanism for action selection.
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Affiliation(s)
- Max-Philipp Stenner
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Department of Neurology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany;
| | - Vladimir Litvak
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom
| | - Robb B Rutledge
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Max Planck University College London Centre for Computational Psychiatry and Ageing Research, London, United Kingdom
| | - Tino Zaehle
- Department of Neurology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - Friedhelm C Schmitt
- Department of Neurology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - Jürgen Voges
- Department of Stereotactic Neurosurgery, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany; and
| | - Hans-Jochen Heinze
- Department of Neurology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany; and
| | - Raymond J Dolan
- Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Max Planck University College London Centre for Computational Psychiatry and Ageing Research, London, United Kingdom
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López-Ramos JC, Guerra-Narbona R, Delgado-García JM. Different forms of decision-making involve changes in the synaptic strength of the thalamic, hippocampal, and amygdalar afferents to the medial prefrontal cortex. Front Behav Neurosci 2015; 9:7. [PMID: 25688195 PMCID: PMC4311640 DOI: 10.3389/fnbeh.2015.00007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 01/08/2015] [Indexed: 01/18/2023] Open
Abstract
Decision-making and other cognitive processes are assumed to take place in the prefrontal cortex. In particular, the medial prefrontal cortex (mPFC) is identified in rodents by its dense connectivity with the mediodorsal (MD) thalamus, and because of its inputs from other sites, such as hippocampus and amygdala (Amyg). The aim of this study was to find a putative relationship between the behavior of mice during the performance of decision-making tasks that involve penalties as a consequence of induced actions, and the strength of field postsynaptic potentials (fPSPs) evoked in the prefrontal cortex from its thalamic, hippocampal, and amygdalar afferents. Mice were chronically implanted with stimulating electrodes in the MD thalamus, the hippocampal CA1 area, or the basolateral amygdala (BLA), and with recording electrodes in the prelimbic/infralimbic area of the prefrontal cortex. Additional stimulating electrodes aimed at evoking negative reinforcements were implanted on the trigeminal nerve. FPSPs evoked at the mPFC from the three selected projecting areas during the food/shock decision-making task decreased in amplitude with shock intensity and animals' avoidance of the reward. FPSPs collected during the operant task also decreased in amplitude (but that evoked by amygdalar stimulation) when lever presses were associated with a trigeminal shock. Results showed a general decrease in the strength of these potentials when animals inhibited their natural or learned appetitive behaviors, suggesting an inhibition of the prefrontal cortex in these conflicting situations.
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Tejeda HA, O'Donnell P. Amygdala inputs to the prefrontal cortex elicit heterosynaptic suppression of hippocampal inputs. J Neurosci 2014; 34:14365-74. [PMID: 25339749 PMCID: PMC4205558 DOI: 10.1523/jneurosci.0837-14.2014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 09/13/2014] [Accepted: 09/18/2014] [Indexed: 11/21/2022] Open
Abstract
Whereas cooperative communication between the hippocampus (HP) and prefrontal cortex (PFC) is critical for cognitive functions, an antagonistic relationship may exist between the basolateral amygdala (BLA) and PFC during emotional processing. As PFC neurons integrate information from converging excitatory BLA and HP inputs, we explored whether the ability of BLA inputs to evoke feedforward inhibition in the PFC affects converging HP synaptic inputs using in vivo intracellular recordings in anesthetized rats. BLA train stimulation decreased HP synaptic responses in the PFC in vivo. This effect was dependent on the timing of HP-evoked responses and the strength of BLA activation. BLA train stimulation also produced heterosynaptic suppression of responses from the amygdalo-piriform cortex, an associative temporal cortical structure. Heterosynaptic suppression was unidirectional as HP trains failed to modify BLA synaptic responses. These findings provide a mechanism by which BLA activation could decrease PFC neural activity and transiently attenuate the HP influence on PFC function.
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Affiliation(s)
- Hugo A Tejeda
- Department of Anatomy and Neurobiology, Program in Neuroscience/National Institutes of Health Graduate Partnership Program, and
| | - Patricio O'Donnell
- Department of Anatomy and Neurobiology, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland 21201
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Mizumori SJY, Jo YS. Homeostatic regulation of memory systems and adaptive decisions. Hippocampus 2014; 23:1103-24. [PMID: 23929788 PMCID: PMC4165303 DOI: 10.1002/hipo.22176] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/17/2013] [Indexed: 11/07/2022]
Abstract
While it is clear that many brain areas process mnemonic information, understanding how their interactions result in continuously adaptive behaviors has been a challenge. A homeostatic-regulated prediction model of memory is presented that considers the existence of a single memory system that is based on a multilevel coordinated and integrated network (from cells to neural systems) that determines the extent to which events and outcomes occur as predicted. The “multiple memory systems of the brain” have in common output that signals errors in the prediction of events and/or their outcomes, although these signals differ in terms of what the error signal represents (e.g., hippocampus: context prediction errors vs. midbrain/striatum: reward prediction errors). The prefrontal cortex likely plays a pivotal role in the coordination of prediction analysis within and across prediction brain areas. By virtue of its widespread control and influence, and intrinsic working memory mechanisms. Thus, the prefrontal cortex supports the flexible processing needed to generate adaptive behaviors and predict future outcomes. It is proposed that prefrontal cortex continually and automatically produces adaptive responses according to homeostatic regulatory principles: prefrontal cortex may serve as a controller that is intrinsically driven to maintain in prediction areas an experience-dependent firing rate set point that ensures adaptive temporally and spatially resolved neural responses to future prediction errors. This same drive by prefrontal cortex may also restore set point firing rates after deviations (i.e. prediction errors) are detected. In this way, prefrontal cortex contributes to reducing uncertainty in prediction systems. An emergent outcome of this homeostatic view may be the flexible and adaptive control that prefrontal cortex is known to implement (i.e. working memory) in the most challenging of situations. Compromise to any of the prediction circuits should result in rigid and suboptimal decision making and memory as seen in addiction and neurological disease. © 2013 The Authors. Hippocampus Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Sheri J Y Mizumori
- This is an open access article under the terms of the Creative Commons Attribution-Non-Commercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. Psychology Department, University of Washington, Seattle, Washington
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Hayes DJ, Jupp B, Sawiak SJ, Merlo E, Caprioli D, Dalley JW. Brain γ-aminobutyric acid: a neglected role in impulsivity. Eur J Neurosci 2014; 39:1921-32. [DOI: 10.1111/ejn.12485] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 12/16/2013] [Accepted: 12/17/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Dave J. Hayes
- Toronto Western Research Institute; Toronto Western Hospital and Division of Neurosurgery; University of Toronto; Toronto ON Canada
- Mind, Brain Imaging and Neuroethics; Institute of Mental Health Research; University of Ottawa; Ottawa ON Canada
- Behavioural and Clinical Neuroscience Institute; University of Cambridge; Cambridge UK
- Department of Psychology; University of Cambridge; Cambridge CB2 3EB UK
| | - Bianca Jupp
- Behavioural and Clinical Neuroscience Institute; University of Cambridge; Cambridge UK
- Department of Psychology; University of Cambridge; Cambridge CB2 3EB UK
| | - Steve J. Sawiak
- Behavioural and Clinical Neuroscience Institute; University of Cambridge; Cambridge UK
- Wolfson Brain Imaging Centre; Department of Clinical Neurosciences; Addenbrooke's Hospital; University of Cambridge; Cambridge UK
| | - Emiliano Merlo
- Behavioural and Clinical Neuroscience Institute; University of Cambridge; Cambridge UK
- Department of Psychology; University of Cambridge; Cambridge CB2 3EB UK
| | | | - Jeffrey W. Dalley
- Behavioural and Clinical Neuroscience Institute; University of Cambridge; Cambridge UK
- Department of Psychiatry; Addenbrooke's Hospital; University of Cambridge; Cambridge UK
- Department of Psychology; University of Cambridge; Cambridge CB2 3EB UK
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Counotte DS, Schiefer C, Shaham Y, O'Donnell P. Time-dependent decreases in nucleus accumbens AMPA/NMDA ratio and incubation of sucrose craving in adolescent and adult rats. Psychopharmacology (Berl) 2014; 231:1675-84. [PMID: 24114427 PMCID: PMC3967069 DOI: 10.1007/s00213-013-3294-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 09/11/2013] [Indexed: 12/17/2022]
Abstract
RATIONALE AND OBJECTIVE There is evidence that cue-induced sucrose seeking progressively increases after cessation of oral sucrose self-administration (incubation of sucrose craving) in both adolescent and adult rats. The synaptic plasticity changes associated with this incubation at different age groups are unknown. We assessed whether incubation of sucrose craving in rats trained to self-administer sucrose as young adolescents, adolescents, or adults is associated with changes in 2-amino-3-(3-hydroxy-5-methyl-isoxazol-4-yl)propanoic acid (AMPA)/N-methyl-D-aspartate (NMDA) ratio (a measure of postsynaptic changes in synaptic strength) in nucleus accumbens. METHODS Three age groups initiated oral sucrose self-administration training (10 days) on postnatal day (P) 35 (young adolescents), P42 (adolescents), or P70 (adults). They were then tested for cue-induced sucrose seeking (assessed in an extinction test) on abstinence days 1 and 21. Separate groups of rats were trained to self-administer sucrose or water (a control condition), and assessed for AMPA/NMDA ratio in nucleus accumbens on abstinence days 1-3 and 21. RESULTS Adult rats earned more sucrose rewards, but sucrose intake per body weight was higher in young adolescent rats. Time-dependent increases in cue-induced sucrose seeking (incubation of sucrose craving) were more pronounced in adult rats, less pronounced in adolescents, and not detected in young adolescents. On abstinence day 21, but not days 1-3, AMPA/NMDA ratio in nucleus accumbens were decreased in rats that self-administered sucrose as adults and adolescents, but not young adolescents. CONCLUSIONS Our data demonstrate age-dependent changes in magnitude of incubation of sucrose craving and nucleus accumbens synaptic plasticity after cessation of sucrose self-administration.
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Affiliation(s)
- Danielle S Counotte
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, 20 Penn St, Rm S-251, Baltimore, MD, 21201, USA,
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Abstract
How does the ventral striatum (VS) prioritize and process afferent input? In this issue, Calhoon and O'Donnell (2013) demonstrate that cortical projections to the VS can attenuate hippocampal and thalamic VS input, suggesting that the cortex can uniquely control VS circuit dynamics.
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