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Ma X, Wang X, Zhu K, Ma R, Chu F, Liu X, Zhang S, Yin T, Zhou X, Liu Z. Study on the Role of Physical Fields in TMAS to Modulate Synaptic Plasticity in Mice. IEEE Trans Biomed Eng 2024; 71:1531-1541. [PMID: 38117631 DOI: 10.1109/tbme.2023.3342012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
OBJECTIVE Transcranial magneto-acoustic stimulation (TMAS) is a composite technique combining static magnetic and coupled electric fields with transcranial ultrasound stimulation (TUS) and has shown advantages in neuromodulation. However, the role of these physical fields in neuromodulation is unclear. Synaptic plasticity is the cellular basis for learning and memory. In this paper, we varied the intensity of static magnetic, electric and ultrasonic fields respectively to investigate the modulation of synaptic plasticity by these physical fields. METHODS There are control, static magnetic field (0.1 T/0.2 T), TUS (0.15/0.3 MPa), and TMAS (0.15 MPa + 0.2 V/m, 0.3 MPa + 0.2 V/m, 0.3 MPa + 0.4 V/m) groups. Hippocampal areas were stimulated at 5 min daily for 7 days and in vivo electrophysiological experiments were performed. RESULTS TMAS induced greater LTP, LTD, and paired-pulse ratio (PPR) than TUS, reflecting that TMAS has a more significant modulation in both long- and short- term synaptic plasticity. In TMAS, a doubling of the electric field amplitude increases LTP, LTD and PPR to a greater extent than a doubling of the acoustic pressure. Increasing the static magnetic field intensity has no significant effect on the modulation of synaptic plasticity. CONCLUSION This paper argues that electric fields should be the main reason for the difference in modulation between TMAS and TUS and that changing the amplitude of the electric field affected the modulation of TMAS more than changing the acoustic pressure. SIGNIFICANCE This study elucidates the roles of the physical fields in TMAS and provides a parameterisation way to guide TMAS applications based on the dominant roles of the physical fields.
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Rivadulla C, Pardo-Vazquez JL, de Labra C, Aguilar J, Suarez E, Paz C, Álvarez-Dolado M, Cudeiro J. Transcranial static magnetic stimulation reduces seizures in a mouse model of Dravet syndrome. Exp Neurol 2023; 370:114581. [PMID: 37884190 DOI: 10.1016/j.expneurol.2023.114581] [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: 05/19/2023] [Revised: 10/03/2023] [Accepted: 10/21/2023] [Indexed: 10/28/2023]
Abstract
Dravet syndrome is a rare form of severe genetic epilepsy characterized by recurrent and long-lasting seizures. It appears around the first year of life, with a quick evolution toward an increase in the frequency of the seizures, accompanied by a delay in motor and cognitive development, and does not respond well to antiepileptic medication. Most patients carry a mutation in the gene SCN1A encoding the α subunit of the voltage-gated sodium channel Nav1.1, resulting in hyperexcitability of neural circuits and seizure onset. In this work, we applied transcranial static magnetic stimulation (tSMS), a non-invasive, safe, easy-to-use and affordable neuromodulatory tool that reduces neural excitability in a mouse model of Dravet syndrome. We demonstrate that tSMS dramatically reduced the number of crises. Furthermore, crises recorded in the presence of the tSMS were shorter and less intense than in the sham condition. Since tSMS has demonstrated its efficacy at reducing cortical excitability in humans without showing unwanted side effects, in an attempt to anticipate a possible use of tSMS for Dravet Syndrome patients, we performed a numerical simulation in which the magnetic field generated by the magnet was modeled to estimate the magnetic field intensity reached in the cerebral cortex, which could help to design stimulation strategies in these patients. Our results provide a proof of concept for nonpharmacological treatment of Dravet syndrome, which opens the door to the design of new protocols for treatment.
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Affiliation(s)
- C Rivadulla
- Universidade da Coruña, NEUROcom, Centro Interdisciplinar de Química e Bioloxía (CICA), Rúa as Carballeiras, A Coruña 15071, Spain; Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas. As Xubias, A Coruña 15006, Spain; Universidade da Coruña, NEUROcom, Facultade de Ciencias da Saúde, Campus de Oza, A Coruña, Spain.
| | - J L Pardo-Vazquez
- Universidade da Coruña, NEUROcom, Centro Interdisciplinar de Química e Bioloxía (CICA), Rúa as Carballeiras, A Coruña 15071, Spain; Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas. As Xubias, A Coruña 15006, Spain; Universidade da Coruña, NEUROcom, Facultade de Ciencias da Saúde, Campus de Oza, A Coruña, Spain
| | - C de Labra
- Universidade da Coruña, NEUROcom, Centro Interdisciplinar de Química e Bioloxía (CICA), Rúa as Carballeiras, A Coruña 15071, Spain; Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas. As Xubias, A Coruña 15006, Spain; Universidade da Coruña, NEUROcom, Facultade de Enfermería e Podoloxía, Campus de Esteiro, Ferrol, Spain
| | - J Aguilar
- Laboratorio de Neurofisiología Experimental, y Circuitos Neuronales Hospital Nacional de Parapléjicos, Servicio de Salud de Castilla-La Mancha, Toledo, Spain
| | - E Suarez
- School of Industrial Engineering, University of Vigo, Campus Universitario Lagoas-Marcosende, Vigo 36310, Spain
| | - C Paz
- School of Industrial Engineering, University of Vigo, Campus Universitario Lagoas-Marcosende, Vigo 36310, Spain
| | - M Álvarez-Dolado
- Laboratorio de Terapia Celular en Neuropatologías, Centro Andaluz de Biología Molecular y Medicina Regenerativa (CABIMER), Spain
| | - J Cudeiro
- Universidade da Coruña, NEUROcom, Centro Interdisciplinar de Química e Bioloxía (CICA), Rúa as Carballeiras, A Coruña 15071, Spain; Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas. As Xubias, A Coruña 15006, Spain; Universidade da Coruña, NEUROcom, Facultade de Ciencias da Saúde, Campus de Oza, A Coruña, Spain; Centro de Estimulación Cerebral de Galicia, Enique Mariñas 32, 15009, A Coruña, Spain
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Akdağ MZ, Oğraş E, Doğanyiğit Z, Akyüz E, Akdag MB, Okan A, Akpolat V, Küllü IR. The increase in c-fos expression in epileptic seizures is inhibited by magnetic field application, but not K Ca1.1 channel expression. Electromagn Biol Med 2023; 42:81-97. [PMID: 37598353 DOI: 10.1080/15368378.2023.2247027] [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: 04/11/2023] [Accepted: 07/15/2023] [Indexed: 08/22/2023]
Abstract
The aim of this study was to understand the expression of big potassium (BK, KCa1.1) channels in epileptic seizures under magnetic field application. Forty Wistar albino adult male rats were divided into five groups (n = 8). First group rats were control group. Pentylenetetrazole (PTZ) administrated to second group rats to induce the seizures with 35 mg/kg intraperitoneally injection every two days. Levetiracetam (LEV) i.p. at a dose of 108 mg/kg was given to third group rats as positive control group (PC) before 20 minutes PTZ administration. Pulsed magnetic field with 1.5 mT was exposed to the fourth group rats for 3 hours a day for 1 month as magnetic field (MF) group. 1.5 mT pulsed magnetic field was exposed to the fifth group rats for 3 hours a day for 1 month in addition to PTZ administration (PTZ+MF). KCa1.1 not changed in hippocampus of PTZ rats while increased in frontal cortex and pons for PTZ group but not changed with magnetic field exposure. KCa1.1 increased in heart of PTZ animals and turned back to mean control values with magnetic field exposure. Suppressing the expected increase of c-fos protein expression in seizures with magnetic field application but not being able to change the KCa1.1 expression shows that new studies can be done by increasing the frequency of 1.5 mT magnetic field.
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Affiliation(s)
- Mehmet Zülkif Akdağ
- Medical Faculty, Department of Biophysics, Dicle University, Diyarbakır, Turkey
| | - Emrah Oğraş
- Medical Faculty, Department of Biophysics, Dicle University, Diyarbakır, Turkey
| | - Züleyha Doğanyiğit
- Medical Faculty, Department of Histology and Embryology, Yozgat Bozok University, Yozgat, Turkey
| | - Enes Akyüz
- International Faculty of Medicine, Department of Biophysics, University of Health Sciences, Istanbul, Turkey
| | - Mahmut Berat Akdag
- Institute of Health Sciences, Department of Physiotherapy and Rehabilitation, Istanbul Medipol University, Istanbul, Turkey
| | - Aslı Okan
- Medical Faculty, Department of Histology and Embryology, Yozgat Bozok University, Yozgat, Turkey
| | - Veysi Akpolat
- Medical Faculty, Department of Biophysics, Dicle University, Diyarbakır, Turkey
| | - I Rem Küllü
- Faculty of Medicine, Yozgat Bozok University, Yozgat, Turkey
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de Labra C, Cudeiro J, Rivadulla C. Synergistic effects of applying static magnetic fields and diazepam to improve EEG abnormalities in the pilocarpine epilepsy rat model. Sci Rep 2023; 13:214. [PMID: 36604478 PMCID: PMC9816095 DOI: 10.1038/s41598-022-26870-z] [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: 11/16/2022] [Accepted: 12/21/2022] [Indexed: 01/06/2023] Open
Abstract
The lithium-pilocarpine rat model is a well-known model of temporal epilepsy. Recently we found that transcranial static magnetic stimulation (tSMS) delay and reduce the signs of EEG in this model. We aim to test the effect of combining the therapeutic action of tSMS and diazepam, a drug used to treat status epilepticus. We induce epilepsy in 12 Sprague-Dawley rats. Animals were classified as "magnet" when a magnetic neodymium cylinder was placed over the skull or "control" when a stainless-steel replica was used. Diazepam was injected 60-min after the second doses of pilocarpine injection. We found a reduction in the number of spikes/minute for magnet condition compared with sham condition, reaching significance at 60 min after diazepam injection. The Root-Mean-Square shown a significant reduction in magnet animals compared with those receiving diazepam (Tukey's-test 30 and 60 min after diazepam injection, p < 0.01; 40 and 50 min after diazepam injection, p < 0.05). Furthermore, the power spectrum analysis shown a reduction in delta, theta, alpha and beta bands, on the diazepam + magnet animals compared to the diazepam + sham group. Analysis of high-frequency oscillations revealed an increased in the ripples due to pilocarpine being reduced by diazepam. Our results demonstrate that application of tSMS previously to diazepam potentiates the effect of the drug by reducing the electroencephalographic pattern associated with epileptiform discharges. We suggest a new synergistic cooperation between pharmacology and neuromodulation as a future treatment for epilepsy.
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Affiliation(s)
- Carmen de Labra
- NEUROcom, Centro Interdisciplinar de Química e Bioloxía (CICA), Universidade da Coruña, Rúa as Carballeiras, 15071, A Coruña, Spain. .,NEUROcom, Facultade de Enfermería e Podoloxía, Universidade da Coruña, Campus de Esteiro, Ferrol, Spain. .,Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas, As Xubias, 15006, A Coruña, Spain.
| | - Javier Cudeiro
- grid.8073.c0000 0001 2176 8535NEUROcom, Centro Interdisciplinar de Química e Bioloxía (CICA), Universidade da Coruña, Rúa as Carballeiras, 15071 A Coruña, Spain ,grid.420359.90000 0000 9403 4738Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas, As Xubias, 15006 A Coruña, Spain ,grid.8073.c0000 0001 2176 8535NEUROcom, Facultade de Ciencias da Saúde, Universidade da Coruña, Campus de Oza, A Coruña, Spain ,Centro de Estimulación Cerebral de Galicia, A Coruña, Spain
| | - Casto Rivadulla
- grid.8073.c0000 0001 2176 8535NEUROcom, Centro Interdisciplinar de Química e Bioloxía (CICA), Universidade da Coruña, Rúa as Carballeiras, 15071 A Coruña, Spain ,grid.420359.90000 0000 9403 4738Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Sergas, As Xubias, 15006 A Coruña, Spain ,grid.8073.c0000 0001 2176 8535NEUROcom, Facultade de Ciencias da Saúde, Universidade da Coruña, Campus de Oza, A Coruña, Spain
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Cheng L, Yang B, Du H, Zhou T, Li Y, Wu J, Cao Z, Xu A. Moderate intensity of static magnetic fields can alter the avoidance behavior and fat storage of Caenorhabditis elegans via serotonin. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:43102-43113. [PMID: 35092591 DOI: 10.1007/s11356-022-18898-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 01/23/2022] [Indexed: 06/14/2023]
Abstract
Man-made static magnetic fields (SMFs) widely exist in human life as a physical environmental factor. However, the biological responses to moderate SMFs exposure and their underlying mechanisms are largely unknown. The present study was focused on exploring the nervous responses to moderate-intensity SMFs at 0.5 T and 1 T in Caenorhabditis elegans (C. elegans). We found that SMFs at either 0.5 T or 1 T had no statistically significant effects on the locomotor behaviors, while the 1 T magnetic field increased pharyngeal pumping. The avoidance behavior of the pathogenic Pseudomonas aeruginosa was greatly decreased in either 0.5 T or 1 T SMFs exposed nematodes, and the learning index was reducede from 0.52 ± 0.11 to 0.23 ± 0.17 and 0.16 ± 0.11, respectively. The total serotonin level was increased by 17.08% and 16.45% with the treatment of 0.5 T and 1 T SMF, compared to the control group; however, there were minimal effects of SMFs on other three neurotransmitters including choline, γ-aminobutyric acid (GABA), dopamine. RT-qPCR was used to further investigate the expression of serotonin-related genes, including rate-limiting enzymes, transcription factors and transport receptors. The expression levels of tph-1 and unc-86 genes were increased by SMF exposure, while those of ocr-2, osm-9, ser-1 and mod-1 genes were decreased. With the staining of lipid in either wild-type N2 or tph-1 mutants, we found that 0.5 T and 1 T SMFs decreased fat storage in C. elegans via serotonin pathway. Our study demonstrated that moderate-intensity SMFs induced neurobehavioral disorder and the reduction of fat storage by disturbing the secretion of serotonin in C. elegans, which provided new insights into elucidating nervous responses of C. elegans to moderate-intensity SMFs.
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Affiliation(s)
- Lei Cheng
- School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China
| | - Baolin Yang
- School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China
| | - Hua Du
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China
| | - Tong Zhou
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China
| | - Yang Li
- School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China
| | - Jiajie Wu
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China
| | - Zhenxiao Cao
- School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China
| | - An Xu
- Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, PR China.
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Torrillas de la Cal A, Paniagua-Torija B, Arevalo-Martin A, Faulkes CG, Jiménez AJ, Ferrer I, Molina-Holgado E, Garcia-Ovejero D. The Structure of the Spinal Cord Ependymal Region in Adult Humans Is a Distinctive Trait among Mammals. Cells 2021; 10:2235. [PMID: 34571884 PMCID: PMC8469235 DOI: 10.3390/cells10092235] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/24/2021] [Accepted: 08/27/2021] [Indexed: 02/06/2023] Open
Abstract
In species that regenerate the injured spinal cord, the ependymal region is a source of new cells and a prominent coordinator of regeneration. In mammals, cells at the ependymal region proliferate in normal conditions and react after injury, but in humans, the central canal is lost in the majority of individuals from early childhood. It is replaced by a structure that does not proliferate after damage and is formed by large accumulations of ependymal cells, strong astrogliosis and perivascular pseudo-rosettes. We inform here of two additional mammals that lose the central canal during their lifetime: the Naked Mole-Rat (NMR, Heterocephalus glaber) and the mutant hyh (hydrocephalus with hop gait) mice. The morphological study of their spinal cords shows that the tissue substituting the central canal is not similar to that found in humans. In both NMR and hyh mice, the central canal is replaced by tissue reminiscent of normal lamina X and may include small groups of ependymal cells in the midline, partially resembling specific domains of the former canal. However, no features of the adult human ependymal remnant are found, suggesting that this structure is a specific human trait. In order to shed some more light on the mechanism of human central canal closure, we provide new data suggesting that canal patency is lost by delamination of the ependymal epithelium, in a process that includes apical polarity loss and the expression of signaling mediators involved in epithelial to mesenchymal transitions.
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Affiliation(s)
- Alejandro Torrillas de la Cal
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos, 45071 Toledo, Spain; (A.T.d.l.C.); (B.P.-T.); (A.A.-M.); (E.M.-H.)
| | - Beatriz Paniagua-Torija
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos, 45071 Toledo, Spain; (A.T.d.l.C.); (B.P.-T.); (A.A.-M.); (E.M.-H.)
| | - Angel Arevalo-Martin
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos, 45071 Toledo, Spain; (A.T.d.l.C.); (B.P.-T.); (A.A.-M.); (E.M.-H.)
| | - Christopher Guy Faulkes
- School of Biological & Chemical Sciences, Queen Mary University of London, London E1 4NS, UK;
| | - Antonio Jesús Jiménez
- Departamento de Biología Celular, Genética y Fisiología, Universidad de Málaga, Campus de Teatinos, 29071 Malaga, Spain;
- Instituto de Investigación Biomédica de Málaga (IBIMA), 29010 Malaga, Spain
| | - Isidre Ferrer
- Institut de Neuropatologia, Servei d’Anatomia Patològica, IDIBELL-Hospital Universitari de Bellvitge, Universitat de Barcelona, 08908 L’Hospitalet de Llobregat, Spain;
| | - Eduardo Molina-Holgado
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos, 45071 Toledo, Spain; (A.T.d.l.C.); (B.P.-T.); (A.A.-M.); (E.M.-H.)
| | - Daniel Garcia-Ovejero
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos, 45071 Toledo, Spain; (A.T.d.l.C.); (B.P.-T.); (A.A.-M.); (E.M.-H.)
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Takamatsu Y, Inoue T, Okamura M, Ikegami R, Maejima H. In vivo local transcranial static magnetic field stimulation alters motor behavior in normal rats. Neurosci Lett 2021; 753:135864. [PMID: 33812926 DOI: 10.1016/j.neulet.2021.135864] [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: 11/02/2020] [Revised: 03/25/2021] [Accepted: 03/25/2021] [Indexed: 11/18/2022]
Abstract
Transcranial static magnetic field stimulation (tSMS) has inhibitory neuromodulatory effects on the human brain. Most of the studies on static magnetic fields have been performed in vitro. To further understand the biological mechanisms of tSMS, we investigated the effects of in vivo tSMS on motor behavior in normal awake rats. The skull of a male Wistar rat was exposed and a polyethylene tube was attached to the skull using dental cement at the center of the motor cortex (n = 7) or the other cortex (n = 6). By attaching a cylindrical NdFeB neodymium magnet into the tube, in vivo tSMS (REAL) was performed. For SHAM, we applied a similar size non-magnetic stainless-steel cylinder. All rats received twice each SHAM and REAL stimulation every two days using a crossover design, and motor function was measured during the stimulation. Activity level and asymmetry of forelimb use were not affected, but less accurate movements in the horizontal ladder test were found in REAL stimulation of the motor cortex. This study shows that in vivo tSMS has inhibitory neuromodulatory effects on motor behavior depending on the stimulated region on the rat cortex.
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Affiliation(s)
- Yasuyuki Takamatsu
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo 060-0812, Japan.
| | - Takahiro Inoue
- Research Fellow of Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan; Graduate School of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo 060-0812, Japan
| | - Misato Okamura
- Graduate School of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo 060-0812, Japan
| | - Ryo Ikegami
- Graduate School of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo 060-0812, Japan
| | - Hiroshi Maejima
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, Kita 12 Nishi 5, Kita-ku, Sapporo 060-0812, Japan
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Viudes-Sarrion N, Velasco E, Delicado-Miralles M, Lillo-Navarro C. Static magnetic stimulation in the central nervous system: a systematic review. Neurol Sci 2021; 42:1733-1749. [PMID: 33675004 DOI: 10.1007/s10072-021-05156-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 02/26/2021] [Indexed: 12/09/2022]
Abstract
OBJECTIVE To systematically review the literature on the use of the transcranial static magnetic stimulation (tSMS) technique in humans and animals, its effects on different areas of the central nervous system (CNS), its influence on neural excitability and on the subject's behavior, and its biological effects and future possibilities. All static magnetic field applications that can be considered to have a physiologically similar effect have been reviewed. METHODS We searched studies using key terms in NCBI PubMed, Scopus, PEDro, SciELO, Cochrane, and links to publications (inception to September 2019). Three reviewers independently selected the studies, extracted data, and assessed the methodological quality of the studies using the recommendations described in the Cochrane Handbook for Systematic Reviews of Interventions, PRISMA guidelines. RESULTS We analyzed 27 studies. The reviewed literature suggests that the use of these magnetic fields has an inhibitory effect on different areas of the CNS, such as motor, somatosensory, and visual cortex, cerebellum, and spinal cord. Regarding subject's behavior, the different effects of tSMS appear to be transient and dependent on the stimulated area, such as loss of visual discrimination or improvement of somatosensory perception. In addition, the technique has some therapeutic utility, specifically in pathologies with cortical hyperexcitability. CONCLUSIONS These results suggest that tSMS may be a promising tool to modulate cerebral excitability in a safe and non-invasive way. Further investigations could give a better explanation of its precise mechanisms of action and applications.
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Affiliation(s)
- Nuria Viudes-Sarrion
- Área de Fisioterapia. Departamento de Patología y Cirugía, Universidad Miguel Hernández, 03550, San Juan de Alicante, Spain
- Instituto de Neurociencias de Alicante (CSIC-Universidad Miguel Hernández), San Juan de Alicante, Spain
| | - Enrique Velasco
- Instituto de Neurociencias de Alicante (CSIC-Universidad Miguel Hernández), San Juan de Alicante, Spain
| | - Miguel Delicado-Miralles
- Instituto de Neurociencias de Alicante (CSIC-Universidad Miguel Hernández), San Juan de Alicante, Spain
| | - Carmen Lillo-Navarro
- Área de Fisioterapia. Departamento de Patología y Cirugía, Universidad Miguel Hernández, 03550, San Juan de Alicante, Spain.
- Instituto de Neurociencias de Alicante (CSIC-Universidad Miguel Hernández), San Juan de Alicante, Spain.
- CEIT Fisioterapia. UMH, San Juan de Alicante, Spain.
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Kirimoto H, Watanabe T, Kubo N, Date S, Sunagawa T, Mima T, Ogata K, Nakazono H, Tobimatsu S, Oliviero A. Influence of Static Magnetic Field Stimulation on the Accuracy of Tachystoscopically Presented Line Bisection. Brain Sci 2020; 10:brainsci10121006. [PMID: 33352946 PMCID: PMC7766566 DOI: 10.3390/brainsci10121006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/10/2020] [Accepted: 12/17/2020] [Indexed: 12/22/2022] Open
Abstract
Transcranial static magnetic stimulation (tSMS) has been known to reduce human cortical excitability. Here, we investigated whether tSMS would modulate visuo-spatial cognition in healthy humans. Subjects performed a visuo-spatial task requiring judgements about the symmetry of pre-bisected lines. Visual stimuli consisted of symmetrically or asymmetrically transected lines, tachystoscopically presented for 150 ms on a computer monitor. Task performance was examined before, immediately after, and 10 min after tSMS/sham stimulation of 20 min over the posterior parietal cortex (PPC: P4 from the international 10-20 system) or superior temporal gyrus (STG: C6). Nine out of 16 subjects misjudged pre-bisected lines by consistently underestimating the length of the right-side segment (judging lines to be exactly pre-bisected when the transector was located to the left of the midpoint, or judging the left-side segment to be longer when the transector was located at the midpoint). In these subjects showing a leftward bias, tSMS over the right STG reduced the magnitude of the leftward bias. This did not occur with tSMS over the right PPC or sham stimulation. In the remaining right-biased subjects, no intervention effect was observed with any stimulation. Our findings indicate that application of tSMS over the right STG modulates visuo-spatial cognition in healthy adults.
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Affiliation(s)
- Hikari Kirimoto
- Department of Sensorimotor Neuroscience, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 7348553, Japan; (T.W.); (N.K.)
- Correspondence:
| | - Tatsunori Watanabe
- Department of Sensorimotor Neuroscience, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 7348553, Japan; (T.W.); (N.K.)
| | - Nami Kubo
- Department of Sensorimotor Neuroscience, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 7348553, Japan; (T.W.); (N.K.)
| | - Shota Date
- Department of Analysis and Control of Upper Extremity Function, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 7348553, Japan; (S.D.); (T.S.)
| | - Toru Sunagawa
- Department of Analysis and Control of Upper Extremity Function, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 7348553, Japan; (S.D.); (T.S.)
| | - Tatsuya Mima
- Graduate School of Core Ethics and Frontier Sciences, Ritsumeikan University, Kyoto 6038577, Japan;
| | - Katsuya Ogata
- Department of Speech and Hearing Sciences, Faculty of Health and Medical Sciences, International University of Health and Welfare, Fukuoka 8318501, Japan;
| | - Hisato Nakazono
- Department of Occupational Therapy, Fukuoka International University of Health and Welfare, Fukuoka 8140001, Japan; (H.N.); (S.T.)
| | - Shozo Tobimatsu
- Department of Occupational Therapy, Fukuoka International University of Health and Welfare, Fukuoka 8140001, Japan; (H.N.); (S.T.)
| | - Antonio Oliviero
- FENNSI Group, Hospital Nacional de Paraple’jicos, SESCAM, 45071 Toledo, Spain;
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