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Porcu M, Cocco L, Marrosu F, Cau R, Puig J, Suri JS, Saba L. Hippocampus and olfactory impairment in Parkinson disease: a comparative exploratory combined volumetric/functional MRI study. Neuroradiology 2024:10.1007/s00234-024-03436-6. [PMID: 39046517 DOI: 10.1007/s00234-024-03436-6] [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: 03/29/2024] [Accepted: 07/18/2024] [Indexed: 07/25/2024]
Abstract
INTRODUCTION Patients with Parkinson's Disease (PD) commonly experience Olfactory Dysfunction (OD). Our exploratory study examined hippocampal volumetric and resting-state functional magnetic resonance imaging (rs-fMRI) variations in a Healthy Control (HC) group versus a cognitively normal PD group, further categorized into PD with No/Mild Hyposmia (PD-N/MH) and PD with Severe Hyposmia (PD-SH). METHODS We calculated participants' relative Total Hippocampal Volume (rTHV) and performed Spearman's partial correlations, controlled for age and gender, to examine the correlation between rTHV and olfactory performance assessed by the Odor Stick Identification Test for the Japanese (OSIT-J) score. Mann-Whitney U tests assessed rTHV differences across groups and subgroups, rejecting the null hypothesis for p < 0.05. Furthermore, a seed-based rs-fMRI analysis compared hippocampal connectivity differences using a one-way ANCOVA covariate model with controls for age and gender. RESULTS Spearman's partial correlations indicated a moderate positive correlation between rTHV and OSIT-J in the whole study population (ρ = 0.406; p = 0.007), PD group (ρ = 0.493; p = 0.008), and PD-N/MH subgroup (ρ = 0.617; p = 0.025). Mann-Whitney U tests demonstrated lower rTHV in PD-SH subgroup compared to both HC group (p = 0.013) and PD-N/MH subgroup (p = 0.029). Seed-to-voxel rsfMRI analysis revealed reduced hippocampal connectivity in PD-SH subjects compared to HC subjects with a single cluster of voxels. CONCLUSIONS Although the design of the study do not allow to make firm conclusions, it is reasonable to speculate that the progressive involvement of the hippocampus in PD patients is associated with the progression of OD.
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Affiliation(s)
- Michele Porcu
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy.
- Department of Medical Imaging, Azienda Ospedaliera Universitaria di Cagliari, S.S. 554, km 4.500, CAP 09042, Monserrato (Cagliari), Italy.
| | - Luigi Cocco
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy
| | - Francesco Marrosu
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy
| | - Riccardo Cau
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy
| | - Josep Puig
- Department of Radiology (IDI), Hospital Universitari de Girona Dr Josep Trueta, Girona, Spain
| | - Jasjit S Suri
- Stroke Monitoring and Diagnostic Division, AtheroPoint™, Roseville, CA, USA
| | - Luca Saba
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy
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Micarelli A, Malacrida S, Vezzoli A, Micarelli B, Misici I, Carbini V, Caputo S, Mrakic-Sposta S, Alessandrini M. Smell, taste and food habits changes along body mass index increase: an observational study. Eur Arch Otorhinolaryngol 2023; 280:5595-5606. [PMID: 37642711 DOI: 10.1007/s00405-023-08204-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 08/19/2023] [Indexed: 08/31/2023]
Abstract
PURPOSE To evaluate the changes in gustatory and olfactory sensitivity and dietary habits between healthy lean subjects (LS) and participants affected by overweight (OW), stage I and II obesity and to estimate possible impact of these factors on body mass index (BMI). METHODS After a general and ear-nose-throat evaluation, taste and olfactory function testing by means of taste strips and sniffin' stick tests, respectively, and food habits analysis by means of food frequency questionnaire (FFQ), 221 participants (68 LS [33 female; mean age = 53.01 ± 7.54 years]; 51 OW [26 female; mean age = 51.5 ± 12.16 years]; 50 stage I obesity [24 female; mean age = 50.78 ± 13.71 years] and 52 stage II obesity [24 female; mean age = 52.21 ± 13.35 years]) were enrolled in the study. RESULTS Significant (p < 0.008) reductions in total and subtest taste and smell scores were found in stage I and II obesity when compared to LS and OW participants. FFQ depicted a progressive intake increase of nutrients along the BMI stages. Significant associations were found between BMI and taste/smell subtests sugar taste carbs, saturated, monounsaturated and polyunsaturated fatty acids. CONCLUSIONS These data demonstrated for the first time a parallel impairment in smell and taste in a large sample size of participants from lean to stage II obesity and could reinforce those previous theories claiming that the greater the ability in taste or smell qualities perception, the lower the preference for them, resulting in a lower intake of specific foods.
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Affiliation(s)
- Alessandro Micarelli
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy.
| | - Sandro Malacrida
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Alessandra Vezzoli
- Institute of Clinical Physiology, National Research Council (CNR), Milan, Italy
| | - Beatrice Micarelli
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy
| | - Ilaria Misici
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy
| | - Valentina Carbini
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy
| | | | | | - Marco Alessandrini
- Department of Clinical Sciences and Translational Medicine, ENT Unit, University of Rome Tor Vergata, Rome, Italy
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Oka N, Iwai K, Sakai H. The neural substrates responsible for food odor processing: an activation likelihood estimation meta-analysis. Front Neurosci 2023; 17:1191617. [PMID: 37424999 PMCID: PMC10326844 DOI: 10.3389/fnins.2023.1191617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 06/07/2023] [Indexed: 07/11/2023] Open
Abstract
In many species including humans, food odors appear to play a distinct role when compared with other odors. Despite their functional distinction, the neural substrates responsible for food odor processing remain unclear in humans. This study aimed to identify brain regions involved in food odor processing using activation likelihood estimation (ALE) meta-analysis. We selected olfactory neuroimaging studies conducted with sufficient methodological validity using pleasant odors. We then divided the studies into food and non-food odor conditions. Finally, we performed an ALE meta-analysis for each category and compared the ALE maps of the two categories to identify the neural substrates responsible for food odor processing after minimizing the confounding factor of odor pleasantness. The resultant ALE maps revealed that early olfactory areas are more extensively activated by food than non-food odors. Subsequent contrast analysis identified a cluster in the left putamen as the most likely neural substrate underlying food odor processing. In conclusion, food odor processing is characterized by the functional network involved in olfactory sensorimotor transformation for approaching behaviors to edible odors, such as active sniffing.
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Micarelli A, Mrakic-Sposta S, Micarelli B, Malacrida S, Misici I, Carbini V, Iennaco I, Caputo S, Vezzoli A, Alessandrini M. Smell Impairment in Stage I-II Obesity: Correlation with Biochemical Regulators and Clinical Aspects. Laryngoscope 2022; 132:2028-2035. [PMID: 35906890 DOI: 10.1002/lary.30325] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/07/2022] [Accepted: 07/15/2022] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To evaluate the differences in olfactory sensitivity, nutritional habits, levels of modulators of feeding and smell, bioelectrical impedance analysis (BIA) measures and metabolic assays between two groups of participants with stage I and II obesity and reciprocal relationships between these parameters. METHODS Eighteen participants with stage I (11 female; mean age = 54.3 ± 13.1 years) and 20 participants with stage II (10 female; mean age = 54.5 ± 11.9) obesity underwent a food frequency questionnaire and Sniffin' Sticks® test battery, anthropometric parameters, and BIA measurements as well as metabolic assays (including plasma levels of leptin, insulin, ghrelin, glucose, insulin-like growth factor-1 [IGF-1] and usual laboratory parameters). RESULTS The stage II obesity participants demonstrated significant higher levels of insulin and leptin and lower levels of ghrelin and IGF-1, a reduction in odor identification (OI) and in total olfactory score, and an increase in visceral and total fat percentage. Among a mosaic of multiple correlations, ghrelin was found to positively correlate with OI and leptin negatively with odor discrimination. CONCLUSION The present study expands the notions positing the olfactory perception - and its connections with metabolic cues, foods habits and BIA measures - changes across the two most important obesity stages. This could ameliorate clinical and research deepening of obesity-related olfactory behavior with possible consequences on diagnosis, treatment and prevention of onset and development of obesity, thus opening possible future strategies involving multidisciplinary contributions. LEVEL OF EVIDENCE Level 3 Laryngoscope, 2022.
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Affiliation(s)
- Alessandro Micarelli
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy
| | | | - Beatrice Micarelli
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy
| | - Sandro Malacrida
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Ilaria Misici
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy
| | - Valentina Carbini
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy
| | - Ilaria Iennaco
- Unit of Neuroscience, Rehabilitation and Sensory Organs, UNITER ONLUS, Rome, Italy
| | | | - Alessandra Vezzoli
- Institute of Clinical Physiology, National Research Council (CNR), Milan, Italy
| | - Marco Alessandrini
- University of Rome Tor Vergata, Department of Clinical Sciences and Translational Medicine - ENT Unit, Rome, Italy
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Torske A, Koch K, Eickhoff S, Freiherr J. Localizing the human brain response to olfactory stimulation: A meta-analytic approach. Neurosci Biobehav Rev 2021; 134:104512. [PMID: 34968523 DOI: 10.1016/j.neubiorev.2021.12.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 11/18/2021] [Accepted: 12/20/2021] [Indexed: 11/28/2022]
Abstract
The human sense of smell and the ability to detect and distinguish odors allows for the extraction of valuable information from the environment, thereby driving human behavior. Not only can the sense of smell help to monitor the safety of inhaled air, but it can also help to evaluate the edibility of food. Therefore, in an effort to further our understanding of the human sense of smell, the aim of this meta-analysis was to provide the scientific community with activation probability maps of the functional anatomy of the olfactory system, in addition to separate activation maps for specific odor categories (pleasant, food, and aversive odors). The activation likelihood estimation (ALE) method was utilized to quantify all relevant and available data to perform a formal statistical analysis on the inter-study concordance of various odor categories. A total of 81 studies (108 contrasts, 1053 foci) fulfilled our inclusion criteria. Significant ALE peaks were observed in all odor categories in brain areas typically associated with the functional neuroanatomy of olfaction including the piriform cortex, amygdala, insula, and orbitofrontal cortex, amongst others. Additional contrast analyses indicate clear differences in neural activation patterns between odor categories.
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Affiliation(s)
- A Torske
- Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Technical University of Munich, Germany; Neuroimaging Center (TUM-NIC), Klinikum rechts der Isar, Technical University of Munich, Munich, Germany; Graduate School of Systemic Neurosciences, Ludwig Maximilians Universität München, Martinsried, Germany
| | - K Koch
- Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Technical University of Munich, Germany; Neuroimaging Center (TUM-NIC), Klinikum rechts der Isar, Technical University of Munich, Munich, Germany; Graduate School of Systemic Neurosciences, Ludwig Maximilians Universität München, Martinsried, Germany
| | - S Eickhoff
- Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany; Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany
| | - J Freiherr
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany; Institute for Process Engineering and Packaging IVV, Sensory Analytics and Technologies, Fraunhofer Freising, Germany.
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Damiani G, Alessandrini M, Caccamo D, Cormano A, Guzzi G, Mazzatenta A, Micarelli A, Migliore A, Piroli A, Bianca M, Tapparo O, Pigatto PDM. Italian Expert Consensus on Clinical and Therapeutic Management of Multiple Chemical Sensitivity (MCS). INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182111294. [PMID: 34769816 PMCID: PMC8582949 DOI: 10.3390/ijerph182111294] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/15/2021] [Accepted: 10/19/2021] [Indexed: 12/29/2022]
Abstract
Multiple chemical sensitivity (MCS) is a multisystem, recurrent, environmental disorder that flares in response to different exposures (i.e., pesticides, solvents, toxic metals and molds) under the threshold limit value (TLV) calculated for age and gender in the general population. MCS is a syndrome characterized by cutaneous, allergic, gastrointestinal, rheumatological, endocrinological, cardiological and neurological signs and symptoms. We performed a systematic review of the literature to summarize the current clinical and therapeutic evidence and then oriented an eDelphi consensus. Four main research domains were identified (diagnosis, treatment, hospitalization and emergency) and discussed by 10 experts and an MCS patient. Thus, the first Italian MCS consensus had the double aim: (a) to improve MCS knowledge among healthcare workers and patients by standardizing the clinical and therapeutic management to MCS patients; and (b) to improve and shed light on MCS misconceptions not supported by evidence-based medicine (EBM).
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Affiliation(s)
- Giovanni Damiani
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy;
- Clinical Dermatology, IRCCS Istituto Ortopedico Galeazzi, 20161 Milan, Italy
- PhD Degree Program in Pharmacological Sciences, Department of Pharmaceutical and Pharmacological Sciences, University of Padua, 35131 Padua, Italy
| | - Marco Alessandrini
- Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, 00133 Rome, Italy;
| | - Daniela Caccamo
- Department of Biomedical Sciences, Dental Sciences, & Morpho-Functional Imaging, Polyclinic Hospital University, 98124 Messina, Italy;
| | - Andrea Cormano
- International Society of Doctors for Environment, 82100 Benevento, Italy;
| | - Gianpaolo Guzzi
- Italian Association for Metals and Biocompatibility Research—A.I.R.M.E.B., 20122 Milan, Italy;
| | - Andrea Mazzatenta
- Department of Neuroscience, Imaging and Clinical Science, ‘G. d’Annunzio’ University of Chieti-Pescara, 66100 Chieti, Italy;
| | - Alessandro Micarelli
- Institute of Mountain Emergency Medicine, Eurac Research, 39100 Bolzano, Italy;
- ITER Center for Balance and Rehabilitation Research (ICBRR), 02032 Rome, Italy
| | - Alberto Migliore
- Department of Internal Medicine, Unit of Rheumatology, San Pietro Fatebenefratelli Hospital, 00189 Rome, Italy;
| | - Alba Piroli
- Department of MeSVA, University of L’Aquila, 67100 L’Aquila, Italy;
| | | | | | - Paolo Daniele Maria Pigatto
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy;
- Clinical Dermatology, IRCCS Istituto Ortopedico Galeazzi, 20161 Milan, Italy
- Correspondence: ; Tel.: +39-02-5031-9971
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D’Ambrosio E, Jauhar S, Kim S, Veronese M, Rogdaki M, Pepper F, Bonoldi I, Kotoula V, Kempton MJ, Turkheimer F, Kwon JS, Kim E, Howes OD. The relationship between grey matter volume and striatal dopamine function in psychosis: a multimodal 18F-DOPA PET and voxel-based morphometry study. Mol Psychiatry 2021; 26:1332-1345. [PMID: 31690805 PMCID: PMC7610423 DOI: 10.1038/s41380-019-0570-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 09/23/2019] [Accepted: 10/23/2019] [Indexed: 01/26/2023]
Abstract
A leading hypothesis for schizophrenia and related psychotic disorders proposes that cortical brain disruption leads to subcortical dopaminergic dysfunction, which underlies psychosis in the majority of patients who respond to treatment. Although supported by preclinical findings that prefrontal cortical lesions lead to striatal dopamine dysregulation, the relationship between prefrontal structural volume and striatal dopamine function has not been tested in people with psychosis. We therefore investigated the in vivo relationship between striatal dopamine synthesis capacity and prefrontal grey matter volume in treatment-responsive patients with psychosis, and compared them to treatment non-responsive patients, where dopaminergic mechanisms are not thought to be central. Forty patients with psychosis across two independent cohorts underwent 18F-DOPA PET scans to measure dopamine synthesis capacity (indexed as the influx rate constant Kicer) and structural 3T MRI. The PET, but not MR, data have been reported previously. Structural images were processed using DARTEL-VBM. GLM analyses were performed in SPM12 to test the relationship between prefrontal grey matter volume and striatal Kicer. Treatment responders showed a negative correlation between prefrontal grey matter and striatal dopamine synthesis capacity, but this was not evident in treatment non-responders. Specifically, we found an interaction between treatment response, whole striatal dopamine synthesis capacity and grey matter volume in left (pFWE corr. = 0.017) and right (pFWE corr. = 0.042) prefrontal cortex. We replicated the finding in right prefrontal cortex in the independent sample (pFWE corr. = 0.031). The summary effect size was 0.82. Our findings are consistent with the long-standing hypothesis of dysregulation of the striatal dopaminergic system being related to prefrontal cortex pathology in schizophrenia, but critically also extend the hypothesis to indicate it can be applied to treatment-responsive schizophrenia only. This suggests that different mechanisms underlie the pathophysiology of treatment-responsive and treatment-resistant schizophrenia.
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Affiliation(s)
- Enrico D’Ambrosio
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK,Psychiatric Neuroscience Group, Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari "Aldo Moro", Bari, Italy
| | - Sameer Jauhar
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK,Early Intervention Psychosis Clinical Academic Group, South London & Maudsley NHS Trust, London
| | - Seoyoung Kim
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
| | - Mattia Veronese
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK
| | - Maria Rogdaki
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK,Psychiatric Imaging Group MRC London Institute of Medical Sciences, Hammersmith Hospital, London, W12 0NN, UK
| | - Fiona Pepper
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK
| | - Ilaria Bonoldi
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK
| | - Vasileia Kotoula
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK
| | - Matthew J Kempton
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK
| | - Federico Turkheimer
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK
| | - Jun Soo Kwon
- Department of Brain & Cognitive Sciences, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea,Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Euitae Kim
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea. .,Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Oliver D Howes
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 8AF, UK. .,Psychiatric Imaging Group MRC London Institute of Medical Sciences, Hammersmith Hospital, London, W12 0NN, UK.
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Karimi-Galougahi M, Yousefi-Koma A, Bakhshayeshkaram M, Raad N, Haseli S. 18FDG PET/CT Scan Reveals Hypoactive Orbitofrontal Cortex in Anosmia of COVID-19. Acad Radiol 2020; 27:1042-1043. [PMID: 32386948 PMCID: PMC7196385 DOI: 10.1016/j.acra.2020.04.030] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 04/20/2020] [Accepted: 04/21/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Mahboobeh Karimi-Galougahi
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Yousefi-Koma
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehrdad Bakhshayeshkaram
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nasim Raad
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Haseli
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Evaluation of Task-Related Brain Activity: Is There a Role for 18F FDG-PET Imaging? BIOMED RESEARCH INTERNATIONAL 2019; 2019:4762404. [PMID: 31355263 PMCID: PMC6634077 DOI: 10.1155/2019/4762404] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 02/03/2019] [Accepted: 06/12/2019] [Indexed: 12/22/2022]
Abstract
Positron emission tomography (PET) with 2-[18F]-fluorodeoxyglucose (FDG) has been widely used for the evaluation of cortical glucose metabolism in several neurodegenerative disorders while its potential role in the evaluation of cortical and subcortical activity during a task in the healthy and pathological brain still remains to be a matter of debate. Few studies have been carried out in order to investigate the potential role of this radiotracer for the evaluation of brain glucose consumption during dynamic brain activation. The aim of this review is to provide a general overview of the applications of FDG-PET in the evaluation of cortical activation at rest and during tasks, describing first the physiological basis of FDG distribution in brain and its kinetic in vivo. An overview of the imaging protocols and image interpretation will be provided as well. As a last aspect, the results of the main studies in this field will be summarized and the results of PET findings performed in healthy subjects and patients suffering from various diseases will be reported.
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Viziano A, Micarelli A, Pasquantonio G, Della-Morte D, Alessandrini M. Perspectives on multisensory perception disruption in idiopathic environmental intolerance: a systematic review. Int Arch Occup Environ Health 2018; 91:923-935. [PMID: 30088144 DOI: 10.1007/s00420-018-1346-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 07/31/2018] [Indexed: 12/24/2022]
Abstract
PURPOSE Multiple chemical sensitivity (MCS) also known as idiopathic environmental intolerance/illness (IEI) encompasses a cohort of subjective symptoms characterized by susceptibility to a wide spectrum of environmental compounds, causing symptoms involving various organs and a decrease in quality of life. The aim of this systematic review is to summarize evidence about MCS, with focus on indexed studies analyzing sensory pathway-related disorders. METHODS Medical databases were searched for English language articles related to the topic, published between 1965 and 2017 in academic, peer-reviewed journals. Particular focus was concentrated on articles depicting disturbances involving sensory organs. References of the relevant articles were examined to identify additional significant documents. RESULTS Fifty-eight studies were eligible for full text review. Of these, 34 studies met the selection criteria and were included in this analysis. Many variables, such as different diagnostic criteria, lack of homogeneous symptom questionnaires and the general incidence of personality traits in control subjects, biased studies as confounding factors. However, moderate evidences show that sensory pathways are somewhat altered, especially with respect to information processing in the limbic system and related cortical areas. Recent studies suggested the presence, in MCS cohorts, of attention bias, sensitization and limbic kindling, as well as recently revealed subclinical organic alterations along sensory pathways. CONCLUSIONS Evidences are consistent with MCS/IEI to be the result of a neural altered processing of sensorial ascending pathways, which combined with peculiar personality traits constitutes the underpinning of a multisensory condition needing multidisciplinary clinical approach.
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Affiliation(s)
- Andrea Viziano
- Department of Clinical Sciences and Translational Medicine, University of Rome'Tor Vergata', Via Montpellier, 1; E sud Tower, 00133, Rome, Italy.
| | - Alessandro Micarelli
- Department of Clinical Sciences and Translational Medicine, University of Rome'Tor Vergata', Via Montpellier, 1; E sud Tower, 00133, Rome, Italy
| | - Guido Pasquantonio
- Department of Clinical Sciences and Translational Medicine, University of Rome'Tor Vergata', Via Montpellier, 1; E sud Tower, 00133, Rome, Italy
| | - David Della-Morte
- University of Rome Tor Vergata, Rome, Italy.,San Raffaele Roma Open University, Rome, Italy.,Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Marco Alessandrini
- Department of Clinical Sciences and Translational Medicine, University of Rome'Tor Vergata', Via Montpellier, 1; E sud Tower, 00133, Rome, Italy
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Cerebral metabolic changes related to clinical parameters in idiopathic anosmic patients during olfactory stimulation: a pilot investigation. Eur Arch Otorhinolaryngol 2017; 274:2649-2655. [PMID: 28283789 DOI: 10.1007/s00405-017-4524-9] [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: 11/22/2016] [Accepted: 02/25/2017] [Indexed: 10/20/2022]
Abstract
Idiopathic olfactory loss neural consequences have been studied especially by means of magnetic resonance imaging. Since other functional neuroimaging technique findings are lacking in the literature, present study used a validated 18F-2-fluoro-2-deoxy-D-glucose (FDG) functional positron emission tomography procedure under olfactory stimulation (OS) to assess brain changes in idiopathic anosmic patients (IAPs) in comparison with healthy subjects (HS). A voxel-based analysis between these groups was used to evaluate FDG uptake in the brain and perform a correlation analysis between metabolic responses and the Sniffin' stick test as well as intensity visuo-analogue scores and disease duration (DD). A significant relative decrease of glucose metabolism in the right and left frontal lobes, left insula, right parietal lobe, and left occipital, temporal and parietal lobes was found in IAPs during OS. The same condition resulted in a relative higher glucose metabolism in the right cerebellum in IAPs. Moreover, a negative correlation between DD and FDG uptake in the left temporo-parietal joint was found in IAPs. Such a correlation suggested a possible involvement of this area metabolic decrease in self-consciousness impairment, which is known to affect IAPs. Present preliminary functional results could be of interest to further deepen such neural impairments possibly useful for future perspective in pharmaceutical and rehabilitative protocols.
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Micarelli A, Chiaravalloti A, Viziano A, Danieli R, Schillaci O, Alessandrini M. Early cortical metabolic rearrangement related to clinical data in idiopathic sudden sensorineural hearing loss. Hear Res 2017; 350:91-99. [PMID: 28460253 DOI: 10.1016/j.heares.2017.04.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 04/13/2017] [Accepted: 04/23/2017] [Indexed: 12/11/2022]
Abstract
Results in studies concerning cortical changes in idiopathic sudden sensorineural hearing loss (ISSNHL) are not homogeneous, in particular due to the different neuroimaging techniques implemented and the diverse stages of ISSNHL studied. Considering the recent advances in state-of-the-art positron emission tomography (PET) cameras, the aim of this study was to gain more insight into the neuroanatomical differences associated with the earliest stages of unilateral ISSNHL and clinical-perceptual performance changes. After an audiological examination including the mean auditory threshold (mean AT), mean speech discrimination score (mean SDS) and Tinnitus Handicap Inventory (THI), 14 right-handed ISSNHL patients underwent brain [18F]fluorodeoxyglucose (FDG)-PET within 72 h of the onset of symptoms. When compared to an homogeneous group of 35 healthy subjects by means of statistical parametric mapping, a relative increase in FDG uptake was found in the right superior and medial frontal gyrus as well as in the right anterior cingulate cortex in ISSNHL patients. Conversely, the same group showed a significant relative decrease in FDG uptake in the right middle temporal, precentral and postcentral gyrus as well as in the left posterior cingulate cortex, left lingual, superior, middle temporal and middle frontal gyrus and in the left insula. Regression analysis showed a positive correlation between mean THI and glucose consumption in the right anterior cingulate cortex and a positive correlation between mean SDS and glucose consumption in the left precentral gyrus. The relative changes in FDG uptake found in these brain regions and the positive correlation with mean SDS and THI scores in ISSNHL could possibly highlight new aspects of cerebral rearrangement, contributing to further explain changes in those functions that support speech recognition during the sudden impairment of unilateral auditory input.
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Affiliation(s)
- Alessandro Micarelli
- University of Rome Tor Vergata, Department of Clinical Sciences and Translational Medicine, Otolaryngology Unit, Italy; University of Rome Tor Vergata, Department of Systems Medicine, Neuroscience Unit, Italy.
| | - Agostino Chiaravalloti
- University of Rome Tor Vergata, Department of Biomedicine and Prevention, Nuclear Medicine Unit, Italy
| | - Andrea Viziano
- University of Rome Tor Vergata, Department of Clinical Sciences and Translational Medicine, Otolaryngology Unit, Italy
| | - Roberta Danieli
- University of Rome Tor Vergata, Department of Biomedicine and Prevention, Nuclear Medicine Unit, Italy
| | - Orazio Schillaci
- University of Rome Tor Vergata, Department of Biomedicine and Prevention, Nuclear Medicine Unit, Italy; IRCCS Neuromed, Pozzilli, Italy
| | - Marco Alessandrini
- University of Rome Tor Vergata, Department of Clinical Sciences and Translational Medicine, Otolaryngology Unit, Italy
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Micarelli A, Chiaravalloti A, Schillaci O, Ottaviani F, Alessandrini M. Aspects of cerebral plasticity related to clinical features in acute vestibular neuritis: a "starting point" review from neuroimaging studies. ACTA OTORHINOLARYNGOLOGICA ITALICA 2016; 36:75-84. [PMID: 27196070 PMCID: PMC4907164 DOI: 10.14639/0392-100x-642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Accepted: 07/25/2015] [Indexed: 11/23/2022]
Abstract
Vestibular neuritis (VN) is one of the most common causes of vertigo and is characterised by a sudden unilateral vestibular failure (UVF). Many neuroimaging studies in the last 10 years have focused on brain changes related to sudden vestibular deafferentation as in VN. However, most of these studies, also due to different possibilities across diverse centres, were based on different times of first acquisition from the onset of VN symptoms, neuroimaging techniques, statistical analysis and correlation with otoneurological and psychological findings. In the present review, the authors aim to merge together the similarities and discrepancies across various investigations that have employed neuroimaging techniques and group analysis with the purpose of better understanding about how the brain changes and what characteristic clinical features may relate to each other in the acute phase of VN. Six studies that strictly met inclusion criteria were analysed to assess cortical-subcortical correlates of acute clinical features related to VN. The present review clearly reveals that sudden UVF may induce a wide variety of cortical and subcortical responses - with changes in different sensory modules - as a result of acute plasticity in the central nervous system.
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Affiliation(s)
- A Micarelli
- Ear-Nose-Throat Unit, "Tor Vergata" University, Rome, Italy;,Systems Medicine Department, Neuroscience Unit, "Tor Vergata" University, Rome, Italy
| | - A Chiaravalloti
- Department of Biomedicine and Prevention, "Tor Vergata" University, Rome, Italy
| | - O Schillaci
- Department of Biomedicine and Prevention, "Tor Vergata" University, Rome, Italy;,IRCCS Neuromed, Pozzilli, Italy
| | - F Ottaviani
- Ear-Nose-Throat Unit, "Tor Vergata" University, Rome, Italy
| | - M Alessandrini
- Ear-Nose-Throat Unit, "Tor Vergata" University, Rome, Italy
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Involvement of Subcortical Brain Structures During Olfactory Stimulation in Multiple Chemical Sensitivity. Brain Topogr 2015; 29:243-52. [DOI: 10.1007/s10548-015-0453-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 09/26/2015] [Indexed: 10/23/2022]
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Chiaravalloti A, Pagani M, Micarelli A, Di Pietro B, Genovesi G, Alessandrini M, Schillaci O. Cortical activity during olfactory stimulation in multiple chemical sensitivity: a (18)F-FDG PET/CT study. Eur J Nucl Med Mol Imaging 2015; 42:733-40. [PMID: 25690545 DOI: 10.1007/s00259-014-2969-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 12/03/2014] [Indexed: 10/24/2022]
Abstract
PURPOSE To investigate the differences in brain glucose consumption during olfactory stimulation between subjects affected by multiple chemical sensitivity (MCS) and a group of healthy individuals. METHODS Two (18)F-FDG PET/CT scans were performed in 26 subjects (6 men and 20 women; mean age 46.7 ± 11 years) with a clinical diagnosis of MCS and in 11 healthy controls (6 women and 5 men; mean age 45.7 ± 11 years), the first scan after a neutral olfactory stimulation (NS) and the second after a pure olfactory stimulation (OS). Differences in (18)F-FDG uptake were analysed by statistical parametric mapping (SPM2). RESULTS In controls OS led to an increase in glucose consumption in BA 18 and 19 and a reduction in glucose metabolism in BA 10, 11, 32 and 47. In MCS subjects, OS led to an increase in glucose consumption in BA 20, 23, 18 and 37 and a reduction in glucose metabolism in BA 8, 9 and 10. CONCLUSION The results of our study suggest that cortical activity in subjects with MCS differs from that in healthy individuals during olfactory stimulation.
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Micarelli A, Pagani M, Chiaravalloti A, Bruno E, Pavone I, Candidi M, Danieli R, Schillaci O, Alessandrini M. Cortical metabolic arrangement during olfactory processing: proposal for a 18F FDG PET/CT methodological approach. Medicine (Baltimore) 2014; 93:e103. [PMID: 25340494 PMCID: PMC4616321 DOI: 10.1097/md.0000000000000103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The aim of this article is to investigate the cortical metabolic arrangements in olfactory processing by using F fluorodeoxyglucose (FDG) positron emission tomography/computed tomography.Twenty-six normosmic individuals (14 women and 12 men; mean age 46.7 ± 10 years) were exposed to a neutral olfactory condition (NC) and, after 1 month, to a pure olfactory condition (OC) in a relatively ecological environment, that is, outside the scanner. All the subjects were injected with 185-210 megabecquerel of F FDG during both stimulations. Statistical parametric mapping version 2 was used in order to assess differences between NC and OC.As a result, we found a significant higher glucose consumption during OC in the cuneus, lingual, and parahippocampal gyri, mainly in the left hemisphere. During NC, our results show a relative higher glucose metabolism in the left superior, inferior, middle, medial frontal, and orbital gyri as well as in the anterior cingulate cortex.The present investigation, performed with a widely available functional imaging clinical tool, may help to better understand the neural responses associated to olfactory processing in healthy individuals and in patients with olfactory disorders by acquiring data in an ecologic, noise-free, and resting condition in which possible cerebral activations related to unwanted attentional processes might be avoided.
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Affiliation(s)
- Alessandro Micarelli
- Department of Clinical Sciences and Translational Medicine (AM, EB, IP, MA), Tor Vergata University; Institute of Cognitive Sciences and Technologies-CNR (MP), Rome, Italy; Department of Nuclear Medicine (MP), Karolinska University Hospital, Stockholm, Sweden; Department of Biomedicine and Prevention (AC, RD, OS), Tor Vergata University; Department of Psychology (MC), "Sapienza" University, Rome; and IRCCS Neuromed (OS), Pozzilli, Italy
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