1
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Anger JT, Case LK, Baranowski AP, Berger A, Craft RM, Damitz LA, Gabriel R, Harrison T, Kaptein K, Lee S, Murphy AZ, Said E, Smith SA, Thomas DA, Valdés Hernández MDC, Trasvina V, Wesselmann U, Yaksh TL. Pain mechanisms in the transgender individual: a review. FRONTIERS IN PAIN RESEARCH 2024; 5:1241015. [PMID: 38601924 PMCID: PMC11004280 DOI: 10.3389/fpain.2024.1241015] [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: 06/15/2023] [Accepted: 01/25/2024] [Indexed: 04/12/2024] Open
Abstract
Specific Aim Provide an overview of the literature addressing major areas pertinent to pain in transgender persons and to identify areas of primary relevance for future research. Methods A team of scholars that have previously published on different areas of related research met periodically though zoom conferencing between April 2021 and February 2023 to discuss relevant literature with the goal of providing an overview on the incidence, phenotype, and mechanisms of pain in transgender patients. Review sections were written after gathering information from systematic literature searches of published or publicly available electronic literature to be compiled for publication as part of a topical series on gender and pain in the Frontiers in Pain Research. Results While transgender individuals represent a significant and increasingly visible component of the population, many researchers and clinicians are not well informed about the diversity in gender identity, physiology, hormonal status, and gender-affirming medical procedures utilized by transgender and other gender diverse patients. Transgender and cisgender people present with many of the same medical concerns, but research and treatment of these medical needs must reflect an appreciation of how differences in sex, gender, gender-affirming medical procedures, and minoritized status impact pain. Conclusions While significant advances have occurred in our appreciation of pain, the review indicates the need to support more targeted research on treatment and prevention of pain in transgender individuals. This is particularly relevant both for gender-affirming medical interventions and related medical care. Of particular importance is the need for large long-term follow-up studies to ascertain best practices for such procedures. A multi-disciplinary approach with personalized interventions is of particular importance to move forward.
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Affiliation(s)
- Jennifer T. Anger
- Department of Urology, University of California San Diego, San Diego, CA, United States
| | - Laura K. Case
- Department of Anesthesiology, University of California San Diego, San Diego, CA, United States
| | - Andrew P. Baranowski
- Pelvic Pain Medicine and Neuromodulation, University College Hospital Foundation Trust, University College London, London, United Kingdom
| | - Ardin Berger
- Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, CA, United States
| | - Rebecca M. Craft
- Department of Psychology, Washington State University, Pullman, WA, United States
| | - Lyn Ann Damitz
- Division of Plastic and Reconstructive Surgery, University of North Carolina, Chapel Hill, NC, United States
| | - Rodney Gabriel
- Division of Regional Anesthesia, University of California San Diego, San Diego, CA, United States
| | - Tracy Harrison
- Department of OB/GYN & Reproductive Sciences, University of California San Diego, San Diego, CA, United States
| | - Kirsten Kaptein
- Division of Plastic Surgery, University of California San Diego, San Diego, CA, United States
| | - Sanghee Lee
- Department of Urology, University of California San Diego, San Diego, CA, United States
| | - Anne Z. Murphy
- Neuroscience Institute, Georgia State University, Atlanta, GA, United States
| | - Engy Said
- Division of Regional Anesthesia, University of California San Diego, San Diego, CA, United States
| | - Stacey Abigail Smith
- Division of Infection Disease, The Hope Clinic of Emory University, Atlanta, GA, United States
| | - David A. Thomas
- Office of Research on Women's Health, National Institutes of Health, Bethesda, MD, United States
| | - Maria del C. Valdés Hernández
- Department of Neuroimaging Sciences, Center for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Victor Trasvina
- Department of Urology, University of California San Diego, San Diego, CA, United States
| | - Ursula Wesselmann
- Departments of Anesthesiology and Perioperative Medicine/Division of Pain Medicine, Neurology and Psychology, and Consortium for Neuroengineering and Brain-Computer Interfaces, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Tony L. Yaksh
- Department of Anesthesiology, University of California San Diego, San Diego, CA, United States
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2
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Williams LJ, Kernot J, Hillier SL, Loetscher T. Spatial Neglect Subtypes, Definitions and Assessment Tools: A Scoping Review. Front Neurol 2021; 12:742365. [PMID: 34899565 PMCID: PMC8653914 DOI: 10.3389/fneur.2021.742365] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 10/14/2021] [Indexed: 12/03/2022] Open
Abstract
Objective: The objective of this scoping review was to capture the reported definitions for the subtypes of neglect post stroke and map the range of assessment tools employed for each neglect subtype. Methods: EMBASE, Emcare, Medline, and psychINFO were searched from database inception. Searching included all allied terms and mesh headings for stroke, spatial neglect, measurement, screening tools, psychometric properties. Two reviewers independently screened studies for inclusion. Primary studies with documented protocols of a spatial neglect tool for adults post stroke, with some aspect of validity or reliability were included. Two reviewers independently reviewed the documented protocols of each tool to determine the underlying subtypes and disagreements were resolved through discussion. Results: There were 371 articles included with 292 tools used for the screening or diagnosis of neglect. The majority of studies (67%) included a tool that did not specify the neglect subtype being assessed, therefore an analysis of the underlying subtypes for each tool is presented. Conclusions: There is no consistency with the terms used to refer to the syndrome of spatial neglect with over 200 different terms used within the included studies to refer to the syndrome as a whole or one of its subtypes. It is essential to unify the terminology and definition for each neglect subtype. There are hundreds of neglect tools available, however many are not able to differentiate presenting subtypes. It is important for clinicians and researchers to critically evaluate the neglect tools being used for the screening and diagnosis of neglect.
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Affiliation(s)
- Lindy J Williams
- Cognitive Aging and Impairment Neurosciences Lab, University of South Australia, Adelaide, SA, Australia.,Innovation IMPlementation and Clinical Translation (IIMPACT) in Health, University of South Australia, Adelaide, SA, Australia.,Allied Health and Human Performance, University of South Australia, Adelaide, SA, Australia
| | - Jocelyn Kernot
- Allied Health and Human Performance, University of South Australia, Adelaide, SA, Australia
| | - Susan L Hillier
- Innovation IMPlementation and Clinical Translation (IIMPACT) in Health, University of South Australia, Adelaide, SA, Australia.,Allied Health and Human Performance, University of South Australia, Adelaide, SA, Australia
| | - Tobias Loetscher
- Cognitive Aging and Impairment Neurosciences Lab, University of South Australia, Adelaide, SA, Australia.,Justice and Society, University of South Australia, Adelaide, SA, Australia
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3
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Filbrich L, Blandiaux S, Manfron L, Farnè A, De Keyser R, Legrain V. Unimodal and crossmodal extinction of nociceptive stimuli in healthy volunteers. Behav Brain Res 2019; 362:114-121. [PMID: 30630019 DOI: 10.1016/j.bbr.2019.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 12/28/2018] [Accepted: 01/06/2019] [Indexed: 11/25/2022]
Abstract
Nociception, the physiological mechanisms specifically processing information about noxious and potentially painful stimuli, has the double function to warn about potential body damages (interoception) and about the cause of such potential damages (exteroception). The exteroceptive function is thought to rely on multisensory integration between somatic and extra-somatic stimuli, provided that extra-somatic stimuli occur near the stimulated body area. To corroborate this hypothesis, we succeeded to show in healthy volunteers that the perception of nociceptive stimuli applied on one hand can be extinguished, as compared to single presentation, by the simultaneous application of nociceptive stimuli on the opposite hand, as well as by the presentation of visual stimuli near the opposite hand. On the contrary, visual stimuli presented near the same stimulated hand facilitated the perception of nociceptive stimuli. This nociceptive extinction phenomenon indicates that the perception of noxious events does not merely rely on the specific activation of the nociceptive system, but also depends on other sensory experiences about the body and the space around it.
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Affiliation(s)
- Lieve Filbrich
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium; Psychological Sciences Research Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Séverine Blandiaux
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
| | - Louise Manfron
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium; Psychological Sciences Research Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Alessandro Farnè
- ImpAct team, Lyon Neuroscience Research Center, INSERM U1028, CNRS UMR5292, Lyon, France
| | - Roxane De Keyser
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
| | - Valéry Legrain
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium; Psychological Sciences Research Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium.
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4
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Chien JH, Korzeniewska A, Hillis AE, Kim JH, Emerson N, Greenspan JD, Campbell CM, Meeker TJ, Markman TM, Lenz FA. Vigilance behaviors and EEG activity in sustained attention may affect acute pain. ACTA ACUST UNITED AC 2017; 3. [PMID: 34295543 PMCID: PMC8294460 DOI: 10.15761/jsin.1000184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
During Sustained Attention to stimuli across many modalities neural activity often decreases over time on task, while Errors in task performance increase (Vigilance Decrement). Sustained Attention to pain has rarely been investigated experimentally despite its clinical significance. We have employed a Sustained Attention protocol (Continuous Performance Task, CPT) in which the subject counts painful laser stimuli (targets) when they occur randomly in a prolonged train of nonpainful nontargets. We hypothesize that the magnitude of the poststimulus oscillatory power divided by baseline power (Event-Related Spectral Perturbation, ERSP - scalp EEG) over Frontoparietal structures will decrease at all frequencies with time on task, while Beta ERSP (14-30Hz) will be correlated with Error Rates in performance of the CPT. During the CPT with a painful target ERSP was found in four separate Windows, as defined by both their frequency band and the time after the stimulus. A Vigilance Decrement was found which confirms that Sustained Attention to pain was produced by this CPT. In addition, Error Rates was correlated inversely with laser energy, and with ratings of pain unpleasantness and salience. Error Rates also were related directly to the Beta ERSP Window at scalp EEG electrodes over the central sulcus. Over time on task, the ERSP magnitude decreased in Alpha (8-14Hz) Window, was unchanged in early and late Delta/Theta Windows (0-8Hz), and increased in the Beta Window. The increase in Beta ERSP and a decrease in the Alpha ERSP occurred at the same EEG electrode over the parietal lobe to a significant degree across subjects. Overall, Beta activity increases with time on task, and with higher Error Rates as in the case of other modalities. In the case of pain increased Errors correspond to misidentification of painful and nonpainful stimuli and so modulate the sensation of pain under the influence of Sustained Attention.
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Affiliation(s)
- J H Chien
- Institute of Biomedical Engineering - Nanomedicine, National Health Research Institutions, Taiwan, Republic of China
| | - A Korzeniewska
- Department of Neurology, Johns Hopkins University, Baltimore, USA
| | - A E Hillis
- Department of Neurology, Johns Hopkins University, Baltimore, USA
| | - J H Kim
- Department of Neurosurgery, Johns Hopkins University, Baltimore, USA.,Department of Neurosurgery, Korea University Guro Hospital, Seoul, Korea
| | - N Emerson
- Department of Neurosurgery, Johns Hopkins University, Baltimore, USA
| | - J D Greenspan
- Department of Pain and Neural Sciences, Dental School, University of Maryland, Baltimore, USA
| | - C M Campbell
- Department of Neurosurgery, Johns Hopkins University, Baltimore, USA.,Department of Psychiatry and Behavioral Sciences, Johns Hopkins University, Baltimore, USA
| | - T J Meeker
- Department of Neurosurgery, Johns Hopkins University, Baltimore, USA
| | - T M Markman
- Department of Neurosurgery, Johns Hopkins University, Baltimore, USA
| | - F A Lenz
- Department of Neurosurgery, Johns Hopkins University, Baltimore, USA
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5
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Zhao ZF, Li XZ, Wan Y. Mapping the Information Trace in Local Field Potentials by a Computational Method of Two-Dimensional Time-Shifting Synchronization Likelihood Based on Graphic Processing Unit Acceleration. Neurosci Bull 2017; 33:653-663. [PMID: 28900900 DOI: 10.1007/s12264-017-0175-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/08/2017] [Indexed: 02/01/2023] Open
Abstract
The local field potential (LFP) is a signal reflecting the electrical activity of neurons surrounding the electrode tip. Synchronization between LFP signals provides important details about how neural networks are organized. Synchronization between two distant brain regions is hard to detect using linear synchronization algorithms like correlation and coherence. Synchronization likelihood (SL) is a non-linear synchronization-detecting algorithm widely used in studies of neural signals from two distant brain areas. One drawback of non-linear algorithms is the heavy computational burden. In the present study, we proposed a graphic processing unit (GPU)-accelerated implementation of an SL algorithm with optional 2-dimensional time-shifting. We tested the algorithm with both artificial data and raw LFP data. The results showed that this method revealed detailed information from original data with the synchronization values of two temporal axes, delay time and onset time, and thus can be used to reconstruct the temporal structure of a neural network. Our results suggest that this GPU-accelerated method can be extended to other algorithms for processing time-series signals (like EEG and fMRI) using similar recording techniques.
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Affiliation(s)
- Zi-Fang Zhao
- Neuroscience Research Institute, Peking University, Beijing, 100191, China
| | - Xue-Zhu Li
- Neuroscience Research Institute, Peking University, Beijing, 100191, China
| | - You Wan
- Neuroscience Research Institute, Peking University, Beijing, 100191, China. .,Department of Neurobiology, School of Basic Medical Sciences, Peking University, Beijing, 100191, China. .,Key Laboratory for Neuroscience, Ministry of Education/National Health and Family Planning Commission, Peking University, Beijing, 100191, China.
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6
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Vizzari V, Barba S, Gindri P, Duca S, Giobbe D, Cerrato P, Geminiani G, Torta DM. Mechanical pinprick pain in patients with unilateral spatial neglect: The influence of space representation on the perception of nociceptive stimuli. Eur J Pain 2016; 21:738-749. [PMID: 27977072 DOI: 10.1002/ejp.978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/14/2016] [Indexed: 11/11/2022]
Abstract
BACKGROUND Crossing the hands over the midline can reduce the perceived intensity of nociceptive stimuli applied onto the hands. It remains unclear to what extent intact representation of peripersonal space influences this effect. Here we used the crossed-hands paradigm in patients with unilateral spatial neglect, a neuropsychological condition characterized by the inability to detect, attend and respond to contralesional (most often left) stimuli, and spared ability to process stimuli in the non-affected space. METHODS Sixteen post-stroke patients without unilateral neglect and 11 patients with unilateral spatial neglect received punctate mechanical pinprick stimuli onto their crossed or uncrossed hands. We tested: (i) whether deficits in space representation reduce the possibility of observing 'crossed-hands analgesia', and; (ii) whether placing the contralesional hand, normally lying in the affected space in the healthy space would increase the number of detected stimuli. RESULTS Our results showed that neglect patients did not exhibit 'crossed-hands' analgesia, but did not provide strong evidence for an improvement in the number of detected stimuli when the contralesional hand was in the healthy space. CONCLUSION These findings uphold the notion that the perception of nociceptive stimuli is modulated by the relative position of the hands in space, but raise questions about the conditions under which these effects may arise. SIGNIFICANCE We show that deficits in space representation can influence the processing of mechanical pinprick stimuli. Our results raise several questions on the mechanisms underlying these effects, which are relevant for the clinical practice.
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Affiliation(s)
- V Vizzari
- Department of Psychology, Universita' degli studi di Torino, Italy
| | - S Barba
- San Camillo Hospital, Torino, Italy
| | - P Gindri
- San Camillo Hospital, Torino, Italy
| | - S Duca
- Koelliker Hospital, Torino, Italy
| | - D Giobbe
- Division of Neurology, Città della Salute e della Scienza, Torino, Italy
| | - P Cerrato
- Stroke Unit, Division of Neurology, Citta della Salute e della Scienza, Torino, Italy
| | - G Geminiani
- Department of Psychology, Universita' degli studi di Torino, Italy
| | - D M Torta
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium
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7
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Kamtchum-Tatuene J, Allali G, Saj A, Bernati T, Sztajzel R, Pollak P, Momjian-Mayor I, Kleinschmidt A. An exploratory cohort study of sensory extinction in acute stroke: prevalence, risk factors, and time course. J Neural Transm (Vienna) 2016; 124:483-494. [PMID: 27942884 PMCID: PMC5357267 DOI: 10.1007/s00702-016-1663-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 12/01/2016] [Indexed: 12/01/2022]
Abstract
Most studies on sensory extinction have focused on selected patients with subacute and chronic right hemisphere lesions. In studies conducted on acute stroke patients, risk factors and time course were not evaluated. Our aim was to determine the prevalence, risk factors, and time course of sensory extinction in the acute stroke setting. Consecutive patients with acute stroke were tested for tactile, visual, auditory, and auditory-tactile cross-modal extinction, as well as for peripersonal visuospatial neglect (PVN). Tests were repeated at 2, 7, 15, 30, and 90 days after initial examination. A multivariable logistic regression analysis was performed to test the association between sensory extinction and demographic and clinical risk factors. Seventy-three patients (38.4% women) were recruited: 64 with ischemic stroke and nine with haemorrhagic stroke. Mean age was 62.3 years (95% CI 58.8–65.7), mean NIHSS score was 1.6 (95% CI 1.2–2.1), and mean time to first examination was 4.1 days (95% CI 3.5–4.8). The overall prevalence of all subtypes of sensory extinction was 13.7% (95% CI 6.8–23.8). Tactile extinction was the most frequent subtype with a prevalence of 8.2% (95% CI 3.1–17.0). No extinction was found beyond 15 days after the first examination. After adjustment for age, sex, lesion side, type of stroke, time to first examination and stroke severity, a lesion volume ≥2 mL (adjusted OR = 38.88, p = 0.04), and presence of PVN (adjusted OR = 24.27, p = 0.04) were independent predictors of sensory extinction. The insula, the putamen, and the pallidum were the brain regions most frequently involved in patients with sensory extinction. Extinction is a rare and transient phenomenon in patients with minor stroke. The presence of PVN and lesion volume ≥2 mL are independent predictors of sensory extinction in acute stroke.
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Affiliation(s)
- Joseph Kamtchum-Tatuene
- Neurology Division, Department of Clinical Neurosciences, Geneva University Hospital, Geneva, Switzerland. .,Brain Infections Group, Institute of Infection and Global Health, University of Liverpool, 8 West Derby Street, Liverpool, L69 7BE, UK.
| | - Gilles Allali
- Neurology Division, Department of Clinical Neurosciences, Geneva University Hospital, Geneva, Switzerland.,Division of Cognitive and Motor Aging, Department of Neurology, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY, USA
| | - Arnaud Saj
- Neurology Division, Department of Clinical Neurosciences, Geneva University Hospital, Geneva, Switzerland.,Neurology and Cognitive Imaging Laboratory, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Thérèse Bernati
- Neurology Division, Department of Clinical Neurosciences, Geneva University Hospital, Geneva, Switzerland
| | - Roman Sztajzel
- Neurology Division, Department of Clinical Neurosciences, Geneva University Hospital, Geneva, Switzerland
| | - Pierre Pollak
- Neurology Division, Department of Clinical Neurosciences, Geneva University Hospital, Geneva, Switzerland
| | | | - Andreas Kleinschmidt
- Neurology Division, Department of Clinical Neurosciences, Geneva University Hospital, Geneva, Switzerland
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8
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Ferrè ER, Haggard P, Bottini G, Iannetti GD. Caloric vestibular stimulation modulates nociceptive evoked potentials. Exp Brain Res 2015; 233:3393-401. [PMID: 26282602 PMCID: PMC4868137 DOI: 10.1007/s00221-015-4412-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 08/08/2015] [Indexed: 01/01/2023]
Abstract
Vestibular stimulation has been reported to alleviate central pain. Clinical and physiological studies confirm pervasive interactions between vestibular signals and somatosensory circuits, including nociception. However, the neural mechanisms underlying vestibular-induced analgesia remain unclear, and previous clinical studies cannot rule out explanations based on alternative, non-specific effects such as distraction or placebo. To investigate how vestibular inputs influence nociception, we combined caloric vestibular stimulation (CVS) with psychophysical and electrocortical responses elicited by nociceptive-specific laser stimulation in humans (laser-evoked potentials, LEPs). Cold water CVS applied to the left ear resulted in significantly lower subjective pain intensity for experimental laser pain to the left hand immediately after CVS, relative both to before CVS and to 1 h after CVS. This transient reduction in pain perception was associated with reduced amplitude of all LEP components, including the early N1 wave reflecting the first arrival of nociceptive input to primary somatosensory cortex. We conclude that cold left ear CVS elicits a modulation of both nociceptive processing and pain perception. The analgesic effect induced by CVS could be mediated either by subcortical gating of the ascending nociceptive input, or by direct modulation of the primary somatosensory cortex.
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Affiliation(s)
| | - Patrick Haggard
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Gabriella Bottini
- Department of Brain and Behavioural Sciences, University of Pavia, Pavia, Italy
- Cognitive Neuropsychology Laboratory, Niguarda Ca' Granda Hospital, Milan, Italy
| | - Gian Domenico Iannetti
- Department of Neuroscience, Physiology and Pharmacology, University College London, London, UK
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9
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Bonato M, Cutini S. Increased attentional load moves the left to the right. J Clin Exp Neuropsychol 2015; 38:158-70. [DOI: 10.1080/13803395.2015.1091065] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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10
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Neural correlates of visuospatial consciousness in 3D default space: Insights from contralateral neglect syndrome. Conscious Cogn 2014; 28:81-93. [DOI: 10.1016/j.concog.2014.06.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 06/21/2014] [Accepted: 06/25/2014] [Indexed: 11/20/2022]
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11
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Torta DM, Diano M, Costa T, Gallace A, Duca S, Geminiani GC, Cauda F. Crossing the line of pain: FMRI correlates of crossed-hands analgesia. THE JOURNAL OF PAIN 2013; 14:957-65. [PMID: 23721874 DOI: 10.1016/j.jpain.2013.03.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 01/25/2013] [Accepted: 03/21/2013] [Indexed: 01/15/2023]
Abstract
UNLABELLED Crossing the hands over the body midline reduces the perceived intensity of nociceptive stimuli applied to the hands by impairing the ability to localize somatosensory stimuli. The neural basis of this "crossed-hands analgesia" has not been investigated previously, although it has been proposed that the effect may be modulated by multimodal areas. We used functional magnetic resonance imaging to test the hypothesis that crossed-hands analgesia is mediated by higher-order multimodal areas rather than by specific somatosensory ones. Participants lay in the scanner while mechanical painful stimuli were applied to their hands held in either a crossed or uncrossed position. They reported significantly lower perceived intensity of pain when their hands were crossed. Although activations elicited by stimuli applied to the crossed hands revealed significantly greater blood oxygen level-dependent responses in the anterior cingulate cortex, the insula, and the medial frontal gyrus, the blood oxygen level-dependent responses in the superior parietal lobe were greater with the hands uncrossed. Our results provide evidence that crossed-hands analgesia is mediated by higher-order frontoparietal multimodal areas involved in sustaining and updating body and spatial representations. PERSPECTIVE We found crossed-hands analgesia to be mediated by multimodal areas, such as the posterior parietal, cingulate, and insular cortices, implicated in space and body representation. Our findings highlight how the perceived intensity of painful stimuli is shaped by how we represent our body and the space surrounding it.
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Affiliation(s)
- Diana M Torta
- Department of Psychology, University of Turin, Turin, Italy.
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12
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Ferrè ER, Bottini G, Iannetti GD, Haggard P. The balance of feelings: Vestibular modulation of bodily sensations. Cortex 2013; 49:748-58. [DOI: 10.1016/j.cortex.2012.01.012] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 12/14/2011] [Accepted: 01/26/2012] [Indexed: 11/28/2022]
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13
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14
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The temporal order judgement of tactile and nociceptive stimuli is impaired by crossing the hands over the body midline. Pain 2013. [DOI: 10.1016/j.pain.2012.10.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Reinersmann A, Landwehrt J, Krumova EK, Ocklenburg S, Güntürkün O, Maier C. Impaired spatial body representation in complex regional pain syndrome type 1 (CRPS I). Pain 2012; 153:2174-2181. [DOI: 10.1016/j.pain.2012.05.025] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 05/09/2012] [Accepted: 05/17/2012] [Indexed: 10/28/2022]
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16
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‘Pseudo-neglect’ in CRPS is closer to ‘anti-neglect’ than to classical hemi-neglect? Pain 2012; 153:2157-2158. [DOI: 10.1016/j.pain.2012.07.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 07/13/2012] [Accepted: 07/20/2012] [Indexed: 11/23/2022]
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17
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de Lussanet MH, Behrendt F, Puta C, Weiss T, Lappe M, Schulte TL, Wagner H. A body-part-specific impairment in the visual recognition of actions in chronic pain patients. Pain 2012; 153:1459-1466. [DOI: 10.1016/j.pain.2012.04.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Revised: 03/27/2012] [Accepted: 04/04/2012] [Indexed: 01/01/2023]
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18
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Jacobs S, Brozzoli C, Farnè A. Neglect: a multisensory deficit? Neuropsychologia 2012; 50:1029-44. [PMID: 22465475 DOI: 10.1016/j.neuropsychologia.2012.03.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 03/12/2012] [Accepted: 03/16/2012] [Indexed: 11/29/2022]
Abstract
Neglect is a neurological syndrome characterised by a lack of conscious perception of events localised in the contralesional side of space. Here, we consider the possible multisensory nature of this disorder, critically reviewing the literature devoted to multisensory manifestations and processing in neglect. Although its most striking manifestations have been observed in the visual domain, a number of studies demonstrate that neglect can affect virtually any sensory modality, in particular touch and audition. Furthermore, a few recent studies have reported a correlation in severity between visual and non-visual neglect-related deficits evaluated in the same patients, providing some preliminary support for a multisensory conception of neglect. Sensory stimulation and sensorimotor adaptation techniques, aimed at alleviating neglect, have also been shown to affect several sensory modalities, including some that were not directly affected by the intervention. Finally, in some cases neglect can bias multisensory interactions known to occur in healthy individuals, leading to abnormal behaviour or uncovering multisensory compensation mechanisms. This evidence, together with neurophysiological and neuroimaging data revealing the multisensory role played by the areas that are most commonly damaged in neglect patients, seems to speak in favour of neglect as a multisensory disorder. However, since most previous studies were not conducted with the specific purpose of systematically investigating the multisensory nature of neglect, we conclude that more research is needed to appropriately assess this question, and suggest some methodological guidelines that we hope will help clarify this issue. At present, the conception of neglect as a multisensory disorder remains a promising working hypothesis that may help define the pathophysiology of this syndrome.
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Affiliation(s)
- Stéphane Jacobs
- INSERM U1028, CNRS UMR5292, Lyon Neuroscience Research Center, ImpAct Team, Lyon F-69000, France.
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Baumgärtner U, Vogel H, Ohara S, Treede RD, Lenz F. Dipole source analyses of laser evoked potentials obtained from subdural grid recordings from primary somatic sensory cortex. J Neurophysiol 2011; 106:722-30. [PMID: 21593389 DOI: 10.1152/jn.00135.2011] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The cortical potentials evoked by cutaneous application of a laser stimulus (laser evoked potentials, LEP) often include potentials in the primary somatic sensory cortex (S1), which may be located within the subdivisions of S1 including Brodmann areas 3A, 3B, 1, and 2. The precise location of the LEP generator may clarify the pattern of activation of human S1 by painful stimuli. We now test the hypothesis that the generators of the LEP are located in human Brodmann area 1 or 3A within S1. Local field potential (LFP) source analysis of the LEP was obtained from subdural grids over sensorimotor cortex in two patients undergoing epilepsy surgery. The relationship of LEP dipoles was compared with dipoles for somatic sensory potentials evoked by median nerve stimulation (SEP) and recorded in area 3B (see Baumgärtner U, Vogel H, Ohara S, Treede RD, Lenz FA. J Neurophysiol 104: 3029-3041, 2010). Both patients had an early radial dipole in S1. The LEP dipole was located medial, anterior, and deep to the SEP dipole, which suggests a nociceptive dipole in area 3A. One patient had a later tangential dipole with positivity posterior, which is opposite to the orientation of the SEP dipole in area 3B. The reversal of orientations between modalities is consistent with the cortical surface negative orientation resulting from superficial termination of thalamocortical neurons that receive inputs from the spinothalamic tract. Therefore, the present results suggest that the LEP may result in a radial dipole consistent with a generator in area 3A and a putative later tangential generator in area 3B.
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Affiliation(s)
- Ulf Baumgärtner
- Center for Biomedicine and Medical Technology Mannheim (CBTM), Ruprecht-Karls-University Heidelberg, Mannheim, Germany
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