The Use of MEG in Clinical Settings

MEG: An Introduction to Methods

Volumn , Issue , 2010, Pages 1-31

  Mäkelä, Jyrki P ^a  

^a HELSINKI UNIVERSITY CENTRAL HOSPITAL   (Finland)

Author keywords

Application of MEG; Clinical details; Clinical settings; Multifaceted clinical evaluation

Indexed keywords

EID: 84919562438     PISSN: None     EISSN: None     Source Type: Book    
DOI: 10.1093/acprof:oso/9780195307238.003.0014     Document Type: Chapter

References (131)

1. Ahonen, A., Hämäläinen, M., Kajola, M., Knuutila, J., Laine, P., Lounasmaa, O., et al. (1993). 122-channel SQUID instrument for investigating the magnetic signals from human brain. Physica Scripta, T49, 198-205.
2. American Academy of Neurology Professional Association (AANPA). (2009). Magnetoencephalography (MEG) Policy. Recommended by the AANPA Medical Economics and Management Committee. Approved by the AANPA Board of Directors on May 8, 2009. St. Paul, MN: AANPA.
3. Aoyama, H., Kamada, K., Shirato, H., Takeuchi, F., Kuriki, S., Iwasaki, Y., et al. (2003). Visualization of the corticospinal tract pathway using magnetic resonance axonography and magnetoencephalography for stereotactic irradiation planning of arteriovenous malformations. Radiother Oncol, 68, 27-32.
4. Assaf B., Karkar K., Laxer K., Garcia P., Austin E., Barbaro N., et al. (2004). Magnetoencephalography source localization and surgical outcome in temporal lobe epilepsy. Clin Neurophysiol, 115, 2066-2076.
5. Balakrishnan, G., Grover, K. M., Mason, K., Smith, B., Barkley, G., Tepley, N., et al. (2007). A retrospective analysis of the effect of general anesthetics on the successful detection of interictal epileptiform activity in magnetoencephalography. (2007) Anesth Analg, 104, 1493-1497.
6. Barkley, G., & Baumgartner, C. (2003). MEG and EEG in epilepsy. J Clin Neurophysiol, 20, 163-178.
7. Barth, D., Sutherling, W., Engel Jr., J., & Beatty, J. (1982). Neuromagnetic localization of epileptiform spike activity in the human brain. Science, 218, 891-894.
8. Barth, D., Sutherling, W., Engel Jr., J., & Beatty, J. (1984). Neuromagnetic evidence of spatially distributred sources underlying epileptiform spikes in the human brain. Science, 223, 293-296.
9. Bittar, R., Olivier, A., Sadikot, A., Andermann, F., Comeau, R., Cyr, M., et al. (1999) Localization of somatosensory function by using positron emission tomography scanning; a comparison with intraoperative cortical stimulation. J Neurosurg, 90, 478-483.
10. Butz, M., Gross, J., Timmermann, L., Moll, M., Freund, H. & Witte, O. (2004). Perilesional pathological oscillatory activity in the magnetoencepohalogram of patients with cortical brain lesions. Neurosci Lett, 355, 93-96.
11. Charmichael, S., & Chesselet, M. (2002). Synchronous neuronal activity is a signal for axonal sprouting after cortical lesions in the adult. J Neurosci, 22, 6062-6070.
12. Cheyne, D., Bostan, A., Gaetz, W., & Pang E. W. (2007). Event-related beamforming: A robust method for presurgical functional mapping using MEG. Clin Neurophysiol, 118, 1691-1704.
13. Cramer, S. (2004). Functional Imaging in stroke recovery. Stroke, 35(SUPPL. I), 2695-2698.
14. Duffay, H. (2005). Lessons from brain mapping in surgery for low-grade glioma:insights into associations between tumour and brain plasticity. Lancet Neurol, 4, 476-485.
15. Duffay, H., Capelle, L., Denvil, D., Sichez, N., Gaticnol, P., Taillandier, L., et al. (2003). Usefulness of intraoperative electrical subcortical mapping during surgery for low-grade gliomas located within eloquent brain regions: functional results in a consecutive series of 103 patients. J Neurosurg, 98, 764-778.
16. Ebersole, J. (1999). Non-invasive pre-surgical evaluation with EEG/MEG source analysis. Electroenceph Clin Neurophysiol, SUPPL. 50, 167-174.
17. Enatsu, R., Mikuni, N., Usui, K., Matsubayashi, J., Taki, J., Begum, T., et al. (2008). Usefulness of MEG magnetometer for spike detection in patients with mesial temporal epileptic focus. NeuroImage 41, 1206-1219.
18. Fernandez, A., Hornero, R., Mayo, A., Poza, J., Gil-Gregorio, P. & Ortiz, T. (2006a). MEG spectral profile in Alzheimer's disease and mild cognitive impairment. Clin Neurophysiol, 117, 306-314.
19. Fernandez, A., Turrero, A., Zuluaga, P., Gil, P., Maestu, F., Campo, P., et al. (2006b) Magnetoencephalographic parietal delta dipole density in mild cognitive impairment:preliminary results of a method to estimate the risk of developing Alzheimer disease. Arch Neurol, 63, 427-430.
20. Fischer, M., Scheler, G., & Stefan, H. (2005). Utilization of magnetoencephalography results to obtain favourable results in epilepsy surgery. Brain, 128, 153-157.
21. Flor, H., Elbert, T., Knecht, S., Wienbruch, C., Pantev, C., Birbaumer, N., et al. (1995). Phantom-limb pain as a perceptual correlate of cortical reorganization following arm amputation. Nature, 375, 482-484.
22. Forss, N., Kirveskari, E., & Gockel, M. (2005). Mirror-like spread of chronic pain. Neurology, 65, 748-750.
23. Forss, N., Mäkelä, J., Keränen, T., & Hari, R. (1995). Trigeminally triggered epileptic hemifacial convulsions. NeuroReport, 6, 918-920.
24. Gallen, C., Schwartz, B., & Bucholz, R. (1995). Presurgical localization of functional cortex using magnetic source imaging. J Neurosurg, 82, 988-994.
25. Gallen, C., Sobel, D., Waltz, T., Aung, M., Copeland, B., Schwartz, B., et al. (1993). Noninvasive presurgical mapping of somatosensory cortex. Neurosurgery, 33, 260-268.
26. Gallen, C., Tecoma, E., Iragui, V., Sobel, D., Schwartz, B., & Bloom, F. (1997) Magnetic source imaging of abnormal low-frequency magnetic activity in presurgical evaluatios of epilepsy. Epilepsia, 38, 452-460.
27. Ganslandt, O., Buchfelder, M., Hastreiter, P., Grummich, P., Fahlbusch, R., & Nimsky, C. (2004). Magnetic source imaging supports clinical decision making in glioma patients. Clin Neurol Neurosurg, 107, 20-26.
28. Ganslandt, O., Steinmeier, R., Kober, H., Vieth, J., Kassubeck, J., Romstöck, J., et al. (1997). Magnetic source imaging combined with image-guided frameless stereotaxy: a new method in surgery around the motor strip. Neurosurgery, 41, 621-628.
29. Gootjes, L., Raij, T., Salmelin, R., & Hari, R. (1999). Left-hemisphere dominance for processing of vowels: a whole-scalp neuromagnetic study. NeuroReport, 10, 2987-2991.
30. Hamer, H. M., Morris, H. H., Mascha, E. J., Karafa, M. T., Bingaman, W. E., Bej, M. D., et al. (2002). Complications of invasive video-EEG monitoring with subdural grid electrodes. Neurology, 58, 97-103.
31. Hara, K., Lin, F.-H., Camposano, S., Foxe, D. M., Grant P. E., Bourgeois, B. F., et al. (2007). Magnetoencephalographic mapping of interictal spike propagation:a technical and clinical report. AJNR, 28, 1486-1488.
32. Hari, R., Ahonen, A., Forss, N., Granström, M.-L., Hämäläinen, M., Kajola, M., et al. (1993). Parietal epileptic mirror focus detected with a whole-head neuromagnetometer. NeuroReport, 5, 45-48.
33. Hari, R., & Forss, N. (1999). Magnetoencephalography in the study of human somatosensory cortical processing. Phil Trans R Soc Lond B, 354, 1145-1154.
34. Helenius, P., Salmelin, R., Service, E., & Connolly, J. (1998). Distinct time courses of word and context comprehension in the left temporal cortex. Brain, 112, 1133-1142.
35. Hill, D., Castellano Smith, A., Simmons, A., Maurer, C., Cox, T., Elwes, R., et al. (2000). Sources of error in comparing functional magnetic resonance imaging and invasive electrophysiological recordings. J Neurosurg, 93, 214-223.
36. Hirata, M., Kato, A., Taniguchi, M., Saitoh, Y., Ninomiya, H., Ihara, A., et al. (2004). Determination of language dominance with synthetic aperture magnetometer: comparison with the Wada test. NeuroImage, 23, 46-53.
37. Huang, M-X., Song, T., Hagler D. J., Podgorny, I., Jousmäki, V., Cui, L., et al. (2007). A novel integrated MEG and EEG analysis method for dipolar sources. NeuroImage, 37, 731-748.
38. Huang, M-X, Theilmann, R., Robb, A., Angeles, A., Nichols, S., Drake, A., et al. (2009). Integrated imaging approach with MEG and DTI to detect mild traumatic brain injury in military and civilian patients. J Neurotrauma, 26, 1213-1226.
39. Hughes, J., Cohen, J., Mayman, C., Scholl, M., & Hendrix, D. (1977). Relationship of the magnetoencephalogram to abnormal activity in the electroencephalogram. J Neurol, 217, 79-93.
40. Hund, M., Rezai, A., Kronberg, E., Cappell, J., Zoneshayn, M., Ribary, U., et al. (1997). Magnetoencephalographic mapping: basis of new functional risk profile in the selection of patients with cortical brain lesions. Neurosurgery, 40, 936-943.
41. Hämäläinen, M., & Hari, R. (2002). Magnetoencephalographic characterization of dynamic brain activation: basic principles and methods of data collection and source analysis. In: J. Mazziotta (ed.). Brain Mapping: the methods. (pp. 227-253) London, New York: Elsevier.
42. Iida, K., Otsubo, H., Matsumoto, Y., Ochi, A., Oishi, M., Holowka, S., et al. (2005). Characterizing magnetic spike sources by using magnetoencephalography-guided neuronavigation in epilepsy surgery in pediatric patients. J Neurosurg, (Pediatrics 2), 102, 187-196.
43. Inoue, T., Fujimura, M., Kumabe, T., Nakasato, N., Higano, S., & Tominaga, T. (2004). Combined three-dimensional anisotropy contrast imaging and magnetoencephalography guidance to preserve visual function in a patient with an occipital lobe tumor. Minim Invas Neurosurg, 47, 249-252.
44. Inoue, T., Shimizu. H., Nakasato, N., Kumabe, T., & Yoshimoto, T. (1999). Accuracy and limitation of functional magnetic resonance imaging for identification of the central sulcus:comparison with magnetoencephalography in patients with brain tumors. NeuroImage, 10, 738-748.
45. Iwasaki, M., Nakasato, N., Shamoto, H. & Yoshimoto, T. (2003). Focal magnetoencephalographic spikes in the superior temporal plane undetected by scalp EEG. J Clin Neurosci, 10, 236-238.
46. Jousmäki, V., & Hari, R. (1996). Cardiac artifacts in magnetoencephalogram. J Clin Neurophysiol, 13, 172-176.
47. Juottonen, K., Gockel, M., Silen, T., Hurri, H., Hari, R., & Forss, N. (2002). Altered central sensorimotor processing in patients with complex regional pain syndrome. Pain, 98, 315-323.
48. Kamada, K., Todo, T., Masutani, Y., Aoki, S., Ino, K., Morita, A., et al. (2007). Visualization of the frontotemporal language fibers by tractography combined with functional magnetic resonance imaging and magnetoencephalography. J Neurosurg, 106, 90-98.
49. Kamada, K., Houkin, K., Takeuchi, F., Ishii. N., Ikeda, J., Sawamura, Y., et al. (2003). Visualization of the eloquent motor system by integration of MEG, functional, and anisotropic diffusion-weighted MRI in functional neuronavigation. Surg Neurol, 59, 353-362.
50. Kamada, K., Saguer, M., Möler, M., Wichlow, K., Katenhauser, M., Kober, H. et al. (1997). Functional and metabolic analysis of cerebral ischemia using magnetoencephalography and proton magnetic resonance spectroscopy. Ann Neurol, 42, 554-563.
51. Kamada, K., Takeuchi, F., Kuriki, S., Oshiro, O., Houkin, K., & Abe, H. (1993). Functional neurosurgical simulation with brain surface magnetic resonance images and magnetoencephalography. Neurosurgery, 33, 269-273.
52. Kettenmann, B., Feichtinger, M., Tilz, C., Kaltenhäuser, M., Hummel, C., & Stefan, H. (2005). Comparison of clonidine to sleep deprivation in the potential to induce spike or sharp wave activity. Clin Neurophysiol, 116, 905-912.
53. Kim, J. S., & Chung, C. K. (2007). Robust source analysis of oscillatory motor cortex activity with inherently variable phase delay. NeuroImage, 37, 518-529.
54. Kim, J. S., & Chung, C. K. (2008). Language lateralization using MEG beta frequency desynchronization during auditory oddball stimulation with one-syllable words. NeuroImage, 42, 1499-1507.
55. Kirchberger, K., Hummel, C., & Stefan, H. (1998). Postoperative multichannel magnetoencephalography in patients with recurrent seizures after epilepsy surgery. Acta Neurol Scand, 98, 1-7.
56. Kirveskari, E., Salmelin, R., & Hari, R. (2006). Neuromagnetic responses to vowels vs. tones reveal hemispheric lateralization. Clin Neurophysiol, 117, 643-648.
57. Klöppel, S., & Büchel, C. (2005). Alternatives to the Wada test: a critical view of functional magnetic resonance imaging in preoperative use. Curr Opin Neurol, 18, 418-423.
58. Knowlton, R. (2006). The role of FDG-PET, ictal SPECT and MEG in the epilepsy surgery evaluation. Epilepsy & Behav, 8, 91-101.
59. Knowlton, R., Laxer, K., Aminoff, M., Roberts, T., Wong, S., & Rowley, H. (1997). Magnetoencephalography in partial epilepsy: clinical yield and localization accuracy. Ann Neurol, 42, 622-631.
60. Knowlton, R., & Shih, J. (2004). Magnetoencephalography in epilepsy. Epilepsia, 45(SUPPL. 4), 61-71.
61. Knowlton R., Elgavish R., Howell J., Blount J., Burneo J., Faught E., et al. (2006). Magnetic source imaging versus intracranial electroencephalogram in epilepsy surgery: a prospective study. Ann Neurol, 59, 835-842.
62. Knowlton, R., Radzan, S., Limdi, N., Elgavish, R., Kkillen, J., Blount, J., et al. (2009). Effect of epilepsy magnetic source imaging on intracranial electrode placement. Ann Neurol 65:716-723.
63. Kober, H., Möller, M., Nimsky, C., Vieth, J., Fahlbusch, R., & Ganslandt, O. (2001a). New approach to localize speech-relevant brain areas and hemispheric dominance using spatially filtered magnetoencephalography. Hum Brain Mapp, 14, 236-250.
64. Kober, H., Nimsky, C., Moller, M., Hastreiter, P., Fahlbusch, R., & Ganslandt, O. (2001b). Correlation of sensorimotor activation with functional magnetic resonance imaging and magnetoencephalography in presurgical functional imaging: a spatial analysis. NeuroImage, 14, 1214-1228.
65. Korvenoja, A., Kirveskari, E., Aronen, H., Avikainen, S., Brander, A., Huttunen, J., et al. (2006). Localization of primary sensorimotor cortex:comparison of magnetoencephalography, functional MR imaging and intraoperative cortical mapping. Radiology, 241, 213-222.
66. Kringelbach, M., Jenkinson, N., Owen, S. L. F., & Aziz, T. Z. (2007). Translational principles of deep brain stimulation. Nature Rev Neurosci, 8, 623-635.
67. Kringelbach, M., Jenkinson, N., Greren A. L., Owen, S. L. F., Hansen, P. C., Cornelissen, P L., et al. (2007). Deep brain stimulation for chronic pain investigated with magnetoencephalography. NeuroReport, 18, 223-228.
68. Krings, T., Reiniges, M., Erberich, S., Kemeny, S., Rohde, V., Spetzger, U., et al. (2001). Functional MRI for presurgical planning: problems, artefacts and solution strategies. J Neurol Neurosurg Psych, 70, 749-760.
69. Lamusuo, S., Forss, N., Ruottinen, H.-M., Bergman, J., Mäkelä, J., Mervaala, E., et al. (1999). 18-F FDG PET and whole-scalp MEG localization of epileptogenic cortex. Epilepsia, 40, 921-930.
70. Lehericy, S., Duffay, H., Cornu, P., Capelle, L., Pidoux, B., Carpentier, A., et al. (2000). Correspondence between functional magnetic resonance imaging somatotopy and individual brain anatomy of the central region: comparison with intraoperative stimulation in patients with brain tumors. J Neurosurg, 92, 589-598.
71. Lewine, J., Andrews, R., Chez, M., Patil, A., Devinsky, O., Smith, M., et al. (1999) Magnetoencephalographic patterns of epileptiform activity in children with regressive autism spectrum disorders. Pediatrics, 104, 405-418.
72. Lewine, J., Davis, J. T., Bigler, ED., Thoma, R., Hill, D., Funke, M., et al. (2007). Objective documentation of traumatic brain injury subsequent to mild head trauma:Multimodal brain imaging with MEG, SPECT and MRI. J Head Trauma Rehabil, 22,141-155.
73. Lin, P. T., Berger, M. S., & Naragajan, S. S. (2006). Motor field sensitivity for preoperative localization of motor cortex. J Neurosurg, 105, 588-594.
74. Lin, Y.-Y., Chang, K.-P., Hsieh, J.-C., Yeh, T.-C., Hsiang, Y.-Y., Kwan, S.-Y., et al. (2003). Magnetoencephalographic analysis of bilaterally synchronous discharges in benign rolandic epilepsy of childhood. Seizure, 12, 448-455.
75. Linkenkaer-Hansen, K., Monto, S., Rytsälä, H., Suominen, K., Isometsä, E., & Kähkönen, S. (2005). Breakdown of long-range temporal correlations in theta oscillations in patients with major depressive disorder. J Neurosci, 25, 10131-10137.
76. Lütkenhöner, B., Krumbholz, K., & Seither-Preisler, A. (2003). Studies of tonotopy based on wave N100 of the auditory evoked field are problematic. NeuroImage, 19, 935-949.
77. Maihöfner, C., Handwerker, H., Neundorfer, B., & Birklein, F. (2004). Cortical reorganization during recovery from complex regional pain syndrome. Neurology, 63, 693-701.
78. Maihöfner, C., Handwerker, H., Neundörfer, B., & Birklein, F. (2003). Patterns of cortical reorganization in complex regional pain syndrome. Neurology, 61, 1707-1715.
79. Mamelak, A., Lopez, N., Akhtari, M., & Sutherling, W. (2002) Magnetoencephalographydirected surgery in patients with neocortical epilepsy. J Neurosurg, 97, 865-873.
80. Merlet, I., Paetau, R., Garcia-Larrea, L., Uutela.K, Granström, M.-L., & Maguiere, F. (1997) Apparent asynchrony between interictal electric and magnetic spikes. NeuroReport, 8, 1071-1076.
81. Merrified, W. S., Simos, P. G., Papanicolau, A. C., Philpott, LM., & Sutherling, W. W. (2007). Hemispheric language dominance in magnetoencephalography: Sensitivity, specificity and data reduction techniques. Epilepsy Behav, 10, 120-128.
82. Mikuni, N., Nagamine, T., Ikeda, A., Terada, K., Taki, W., Kimura, J., et al. (1997). Simultaneous recording of epileptiform discharges by MEG and subdural electrodes in temporal lobe epilepsy. NeuroImage, 5, 298-306.
83. Modena, I., Ricci, G., Barbanera, S., Romani, G., & Carelli, P. (1982). Biomagnetic measurements of spontaneous brain activity in epileptic patients. Electroenceph clin Neurophysiol, 54, 622-628.
84. Mogilner, A., Grossman, A., Ribary, U., Joliot, M., Volkmann, J., Rapaport, D., et al. (1993). Somatosensory cortical plasticity in adult humans revealed by magnetoencephalography. Proc Natl Acad Sci USA, 90, 3593-3597.
85. Mäkelä J.P., Forss N., Jääskeläinen J., Kirveskari E., Korvenoja A., & Paetau R. (2006). Magnetoencephalography in neurosurgery. Neurosurgery, 59, 493-510.
86. Mäkelä, J.P., Kirveskari, E., Seppä, M., Hämäläinen, M., Forss, N., Avikainen, S., et al. (2001). Three-dimensional integration of brain anatomy and function to facilitate intraoperative navigation around the sensorimotor strip. Hum Brain Mapp, 12, 180-192.
87. Mäkelä, J. P., Salmelin, R., Hokkanen, L., Launes, J., & Hari, R. (1998a). Neuromagnetic sequelae of herpes simplex encephalitis. Electroenceph clin Neurophysiol, 106, 251-258.
88. Mäkelä, J. P., Salmelin, R., Kotila, M., Salonen, O., Laaksonen, R., Hokkanen, L., et al. (1998b). Left thalamic infarctions modify neuromagnetic cortical signals. Electroenceph clin Neurophysiol, 106, 433-443.
89. Mäkelä, J.P., Taulu, S., Ahonen, A., Pohjola, J., & Pekkonen, E. (2007). Effects of subthalamic nucleus stimulation on spontaneous sensorimotor MEG activity in a Parkinsonian patient. International Congress Series, 1300, 345-348.
90. Mäkelä, J. P., Iivanainen, M., Pieninkeroinen, I. P., Waltimo, O., Lahdensuu, M. (1993). Seizures associated with propofol anesthesia. Epilepsia, 34, 832-835.
91. Nakasato, N., Kumabe, T., Kanno, A., Ohtomo, S., Mizoi, K., & Yoshimoto, T. (1997). Neuromagnetic evaluation of cortical auditory function in patients with temporal lobe tumors. J Neurosurg, 86, 610-618.
92. Oliviero, A., Tecchio, F., Zappasodi, F., Pasqualetti, P., Salustri, C., Lupoi, D., et al. (2004). Brain sensorimotor hand area functionality in acute stroke: insights from magnetoencephalography. NeuroImage, 23, 542-550.
93. Osipova, D., Ahveninen, J., Jensen, O., Ylikoski, A., & Pekkonen, E. (2005). Altered generation of spontaneous oscillations in Alzheimer's disease. NeuroImage, 27, 835-8411.
94. Otsubo H., Ochi A., & Elliot, I. (2001). MEG predicts epileptic zone in lesional extrahippocampal epilepsy: 12 pediatric surgery cases. Epilepsia, 42, 1523-1530.
95. Paetau, R., Granström, M.-L., Blomstedt, G., Jousmäki, V., Korkman, M., & Liukkonen, E. (1999). Magnetoencephalography in presurgical evaluation of children with the Landau-Kleffner syndrome. Epilepsia, 40, 326-335.
96. Palva, J., Palva, S., & Kaila, K. (2005). Phase synchrony among neuronal oscillations in the human cortex. J Neurosci, 25, 3962-3972.
97. Papanicolaou, A., Simos, P., Castillo, E., Breier, J., Sarkari, S., Pataraia, E., et al. (2004). Magnetoencephalography: a noninvasive alternative to the Wada procedure. J Neurosurg, 100, 867-876.
98. Papanicolau A., Pataraia E., Billingsley-Marshall R., Castillo E., Wheless J., Swank P., et al. (2005). Toward the substitution of invasive electroencephalography in epilepsy surgery. J Clin Neurophysiol, 22, 231-237.
99. Parkkonen, L., Fujiki, N., & Mäkelä, JP. (2009). Sources of auditory brainstem responses revisited: Contribution by magnetoencephalography. Human Brain Mapping 30, 1772-1782.
100. Parviainen, T., Helenius, P., & Salmelin, R. (2005). Cortical differentiation of speech and nonspeech sounds at 100 ms: implications for dyslexia. Cerebral Cortex, 15, 1054-1063.
101. Pataraia, E., Baumgartner, C., Lidinger, G., & Deecke, L. (2002) Magnetoencephalography in presurgical epilepsy evaluation. Neurosurg, Rev. 25, 141-159.
102. Pujol, J., Deus, J., Acebes, JJ., Villanueva, A., Aparicio, A., Soriano-Mas, C., et al. (2008). Identification of the sensorimotor cortex with functional MRI: frequency and actual contribution in a neurosurgical context. J Neuroimaging, 18, 28-33.
103. Ramantani, G., Boor, R., Paetau, R., Ille, N., Feneberg, R., Rupp, A., et al. (2006). MEG versus EEG: influence of background activity on interictal spike detection. J Clin Neurophysiol, 23, 498-508.
104. Rezai, A., Hund, M., Kronberg, E., Zoneshayn, M., Cappell, J., Ribary, U., et al. (1996). The interactive use of magnetoencephalography in stereotactic image-guided neurosurgery. Neurosurgery, 39, 92-102.
105. Roberts, D., Hartov, A., Kennedy, F., Miga, M., & Paulsen, K. (1998). Intraoperative brain shift and deformation: a quantitative analysis of cortical displacement in 28 cases. Neurosurgery, 42, 749-760.
106. Rossini, P., Calautti, C., Pauri, F., & Baron, J.-C. (2003) Post-stroke reorganization in the adult brain. Lancet Neurol, 2, 493-502.
107. Salenius, S., Portin, K., Kajola, M., Salmelin, R., & Hari, R. (1997). Cortical control of human motoneuron firing during isometric contractions. J Neurophysiol, 77, 3401-3405.
108. Salmelin, R., Hari, R., Lounasmaa, O. V., & Sams, M. (1994). Dynamics of brain activation during picture naming. Nature, 368, 463-465.
109. Salmelin, R. (2007). Clinical neurophysiology of language: the MEG approach. Clin Neurophysiol, 118, 237-254.
110. Schiffbauer, H., Berger, M., Ferrari, P., Freudenstein, D., Rowley, H., & Roberts, T. (2002). Preoperative magnetic source imaging for brain tumor surgery: a quantitative comparison with intraoperative sensory and motor mapping. J Neurosurg, 97, 1333-1342.
111. Schnitzler, A., & Gross, J. (2005). Normal and pathological oscillatory communication in the brain. Nature Neurosci, 6, 285-296.
112. Shiraishi, H., Watanabe, Y., Watanabe, M., Inoue, Y., Fujiwara, T., & Yagi K. (2001). Interictal and ictal magnetoencephalographic study in patients with medial frontal lobe epilepsy. Epilepsia, 42, 875-882.
113. Stefan, H., Hummel, C., Scheler, G., Druschky, K., Tilz, C., Kaltenhäuser, M., et al. (2003). Magnetic brain source imaging of focal epileptic activity: a synopsis of 455 cases. Brain, 126, 2396-2405.
114. Sutherling, W., Crandall, P., Darcey, T., Becker, D., Levesque, M., & Barth, D. (1988). The magnetic and electric fields agree with intracranial localizations of somatosensory cortex. Neurology 38, 1705-1714.
115. Sutherling, W., Mamelak, A., Thyerlei, D., Maleeva, T., Minazad, Y., Philpott, L., et al. (2008) Influence of magnetic source imaging for planning intracranial EEG in epilepsy. Neurology 71, 990-996.
116. Schwartz, E. S., Dlugos, D. L., Storm, P. B., Dell, J., Magee, R., Flynn, T. P., et al. (2008). Magnetoencephalography for pediatric epilepsy: how we do it. Am J Neuroradiol 29(5), 832-837.
117. Szmuk, P., Kee, S., Pivalizza, E. G., Warters, R., Abramson, D. C., & Ezri, T. (2003). Anaesthesia for magnetoencephalography in children with intractable seizures. Paediatric Anaesth, 13, 811-817.
118. Szymanski, M., Perry, D., Cage, N. M., Rowley, H., Walker, J., Berger, M., et al. (2001). Magnetic source imaging of late evoked field responses to vowels: toward an assessment of hemispheric dominance for language. J Neurosurg, 94, 445-453.
119. Tang, L., Mantle, M., Ferrari, P., Schiffbauer, H., Rowley, A. A., Barbaro, N. M., et al. (2003). Consistency of interictal and ictal onset localization using magnetoencephalography in patients with partial epilepsy. J Neurosurg, 98, 837-845.
120. Tanaka, N., Thiele, E., Madsen, J., Bourgeois, B., & Stufflebeam, S. (2009). Magnetoencephalographic analysis in patients with vagus nerve stimulator. Pediatr Neurol 41, 383-387.
121. Tao, J. X., Ray, A., Hawes-Ebersole, S., & Ebersole, J. S. (2005) Intracranial EEG substrates of scalp EEG interictal spikes. Epilepsia, 46, 669-676.
122. Taulu, S., Simola, J., & Kajola, M. (2005). Applications of the signal space separation method. IEEE Trans Sign Proc., 53, 3359-3372.
123. Taulu, S., & Simola, J. (2006), Spatiotemporal signal space separation method for rejecting nearby interference in MEG measurements. Phys Med Biol, 51, 1759-1768.
124. Tecchio, F., Zappasodi, F., Pasqualetti, P., Tombini, M., Salustri, C., Oliviero, A., et al. (2005). Rhythmic brain activity at rest from rolandic areas in acute mono-hemispheric stroke: a magnetoencephalographic study. NeuroImage, 28, 72-83.
125. Tilz, C., Hummel, C., Kettenmann, B., & Stefan, H. (2002). Ictal onset localization of epileptic seizures by magnetoencephalography. Acta Neurol Scand, 106, 190-195.
126. Uutela, K., Taulu, S., & Hämäläinen, M. (2001). Detecting and correcting for head movements in neuromagnetic measurements. NeuroImage, 14, 1424-1431.
127. Vates, E., Lawton, M., Wilson, C., McDermott, M., Halbach, V., Roberts, T., et al. (2002). Magnetic source imaging demonstrates altered cortical distribution of function in patients with arteriovenous malformations. Neurosurgery, 51, 614-622.
128. Vitikainen A-M., Lioumis P., Metsähonkala L., Salli E., Komssi S., Kicic D., et al. (2009). Combined use of non-invasive techniques for improved functional localization for a selected group of epilepsy surgery candidates. NeuroImage 45, 342-348.
129. Vrba, J., Betts, K., Burbank, M., Cheung, T., Fife, A., Haid, G., et al. (1993). Whole cortex 64 channel SQUID biomagnetometer system. IEEE Trans Appl Sup. 3, 1878-1882.
130. Worrell, G. A., Parish, L., Cranstoun, S. D., Jonas, R., Baltuch G., & Litt, B. (2004). Highfrequency oscillations and seizure generation in neocortical epilepsy. Brain, 127, 1496-1506.
131. Yu, H., Nakasato, N., Iwasaki, M., Shamoto, H., Nagamatsu, K., & Yoshimoto, T. (2004) Neuromagnetic separation of secondarily bilateral synchronized spike foci: report of three cases. J Clin Neurosci, 11, 644-648.