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Onishi H, Oyama M, Soma T, Kubo M, Kirimoto H, Murakami H, Kameyama S. Neuromagnetic activation of primary and secondary somatosensory cortex following tactile-on and tactile-off stimulation. Clin Neurophysiol 2010; 121:588-93. [DOI: 10.1016/j.clinph.2009.12.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2009] [Revised: 11/24/2009] [Accepted: 12/17/2009] [Indexed: 10/19/2022]
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52
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Tanaka E, Kida T, Inui K, Kakigi R. Change-driven cortical activation in multisensory environments: an MEG study. Neuroimage 2009; 48:464-74. [PMID: 19559795 DOI: 10.1016/j.neuroimage.2009.06.037] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Revised: 06/12/2009] [Accepted: 06/16/2009] [Indexed: 11/26/2022] Open
Abstract
The quick detection of dynamic changes in multisensory environments is essential to survive dangerous events and orient attention to informative events. Previous studies have identified multimodal cortical areas activated by changes of visual, auditory, and tactile stimuli. In the present study, we used magnetoencephalography (MEG) to examine time-varying cortical processes responsive to unexpected unimodal changes during continuous multisensory stimulation. The results showed that there were change-driven cortical responses in multimodal areas, such as the temporo-parietal junction and middle and inferior frontal gyri, regardless of the sensory modalities where the change occurred. These multimodal activations accompanied unimodal activations, both of which in general had some peaks within 300 ms after the changes. Thus, neural processes responsive to unimodal changes in the multisensory environment are distributed at different timing in these cortical areas.
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Affiliation(s)
- Emi Tanaka
- Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki 444-8585, Japan.
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Sakamoto K, Nakata H, Kakigi R. Somatotopic representation of the tongue in human secondary somatosensory cortex. Clin Neurophysiol 2008; 119:2125-34. [DOI: 10.1016/j.clinph.2008.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 04/25/2008] [Accepted: 05/02/2008] [Indexed: 10/21/2022]
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54
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Nakata H, Tamura Y, Sakamoto K, Akatsuka K, Hirai M, Inui K, Hoshiyama M, Saitoh Y, Yamamoto T, Katayama Y, Kakigi R. Evoked magnetic fields following noxious laser stimulation of the thigh in humans. Neuroimage 2008; 42:858-68. [DOI: 10.1016/j.neuroimage.2008.05.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Revised: 04/23/2008] [Accepted: 05/09/2008] [Indexed: 01/29/2023] Open
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Arnfred SM, Hansen LK, Parnas J, Mørup M. Regularity increases middle latency evoked and late induced beta brain response following proprioceptive stimulation. Brain Res 2008; 1218:114-31. [DOI: 10.1016/j.brainres.2008.03.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2007] [Revised: 03/17/2008] [Accepted: 03/19/2008] [Indexed: 10/22/2022]
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56
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Sakamoto K, Nakata H, Kakigi R. Somatosensory-evoked magnetic fields following stimulation of the tongue in humans. Clin Neurophysiol 2008; 119:1664-73. [DOI: 10.1016/j.clinph.2008.03.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2007] [Revised: 02/26/2008] [Accepted: 03/25/2008] [Indexed: 11/28/2022]
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57
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Ku Y, Ohara S, Wang L, Lenz FA, Hsiao SS, Bodner M, Hong B, Zhou YD. Prefrontal cortex and somatosensory cortex in tactile crossmodal association: an independent component analysis of ERP recordings. PLoS One 2007; 2:e771. [PMID: 17712419 PMCID: PMC1942117 DOI: 10.1371/journal.pone.0000771] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2007] [Accepted: 07/04/2007] [Indexed: 11/28/2022] Open
Abstract
Our previous studies on scalp-recorded event-related potentials (ERPs) showed that somatosensory N140 evoked by a tactile vibration in working memory tasks was enhanced when human subjects expected a coming visual stimulus that had been paired with the tactile stimulus. The results suggested that such enhancement represented the cortical activities involved in tactile-visual crossmodal association. In the present study, we further hypothesized that the enhancement represented the neural activities in somatosensory and frontal cortices in the crossmodal association. By applying independent component analysis (ICA) to the ERP data, we found independent components (ICs) located in the medial prefrontal cortex (around the anterior cingulate cortex, ACC) and the primary somatosensory cortex (SI). The activity represented by the IC in SI cortex showed enhancement in expectation of the visual stimulus. Such differential activity thus suggested the participation of SI cortex in the task-related crossmodal association. Further, the coherence analysis and the Granger causality spectral analysis of the ICs showed that SI cortex appeared to cooperate with ACC in attention and perception of the tactile stimulus in crossmodal association. The results of our study support with new evidence an important idea in cortical neurophysiology: higher cognitive operations develop from the modality-specific sensory cortices (in the present study, SI cortex) that are involved in sensation and perception of various stimuli.
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Affiliation(s)
- Yixuan Ku
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, United States of America
- Tsinghua University, Beijing, People's Republic of China
| | - Shinji Ohara
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Liping Wang
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, United States of America
- The Institute of Cognitive Neuroscience, East China Normal University, Shanghai, People's Republic of China
| | - Fred A. Lenz
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Steven S. Hsiao
- Krieger Mind/Brain Institute, Johns Hopkins University, Baltimore, Maryland, United States of America
- Department of Neuroscience, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Mark Bodner
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, United States of America
- The Music Intelligence Neural Development Institute, Costa Mesa, California, United States of America
| | - Bo Hong
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, United States of America
- Tsinghua University, Beijing, People's Republic of China
| | - Yong-Di Zhou
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, United States of America
- Krieger Mind/Brain Institute, Johns Hopkins University, Baltimore, Maryland, United States of America
- * To whom correspondence should be addressed. E-mail:
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Wasaka T, Kida T, Nakata H, Akatsuka K, Kakigi R. Characteristics of sensori-motor interaction in the primary and secondary somatosensory cortices in humans: a magnetoencephalography study. Neuroscience 2007; 149:446-56. [PMID: 17869442 DOI: 10.1016/j.neuroscience.2007.07.040] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Revised: 07/25/2007] [Accepted: 07/26/2007] [Indexed: 11/30/2022]
Abstract
We studied sensori-motor interaction in the primary (SI) and secondary somatosensory cortex (SII) using magnetoencephalography. Since SII in both hemispheres was activated following unilateral stimulation, we analyzed SIIc (contralateral to stimulation) as well as SIIi (ipsilateral to stimulation). Four tasks were performed in human subjects in which a voluntary thumb movement of the left or right hand was combined with electrical stimulation applied to the index finger of the left or right hand: L(M)-L(S) (movement of the left thumb triggered stimulation to the left finger), L(M)-R(S) (movement of the left thumb triggered electrical stimulation to the right finger), R(M)-R(S) (movement of the right thumb triggered electrical stimulation to the right finger), and R(M)-L(S) (movement of the right thumb triggered electrical stimulation to the left finger). Stimulation to the index finger only (S condition) was also recorded. In SI, the amplitude of N20m and P35m was significantly attenuated in the R(M)-R(S) and L(M)-L(S) tasks compared with the S condition, but that for other tasks showed no change, corresponding to a conventional gating phenomenon. In SII, the R(M)-L(S) task significantly enhanced the amplitude of SIIc but reduced that of SIIi compared with the S condition. The L(M)-L(S) and R(M)-R(S) tasks caused a significant enhancement only in SIIi. The L(M)-R(S) task enhanced the amplitude only in SIIc. The laterality index showed that SII modulation with voluntary movement was more dominant in the hemisphere ipsilateral to movement but was not affected by the side of stimulation. These results provided the characteristics of activities in somatosensory cortices, a simple inhibition in SI but complicated changes in SII depending on the side of movement and stimulation, which may indicate the higher cognitive processing in SII.
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Affiliation(s)
- T Wasaka
- Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki, 444-8585, Japan.
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Ploner M, Platzen J, Pollok B, Gross J, Schnitzler A. Evoked response amplitudes from somatosensory cortices do not determine reaction times to tactile stimuli. Eur J Neurosci 2007; 25:3734-41. [PMID: 17610593 DOI: 10.1111/j.1460-9568.2007.05611.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sensory events cause changes in brain activity, which underlie the perception of and behavioural responses to sensory stimuli. Evoked cortical responses are an important measure of these stimulus-evoked changes in brain activity. However, evidence on the relationship between behavioural responses and evoked responses is inconsistent. Therefore, we used magnetoencephalography to reinvestigate the relationship between evoked responses from somatosensory cortices and behavioural responses to somatosensory stimuli. We characterized modulations of somatosensory-evoked responses exerted by preceding painful and tactile conditioning stimuli (CS), and related these modulations of evoked responses to modulations of reaction times. Our results show that painful CS yield a long-lasting (> 4 s) facilitation of evoked responses, whereas tactile CS result in a shorter lasting (1-2 s) suppression of evoked responses to tactile stimuli. These contrary physiological effects were both associated with a significant shortening of reaction times. These findings indicate that the conditioning effects of painful and tactile stimuli represent essentially different modulatory mechanisms. Moreover, our results show that amplitudes of evoked responses from somatosensory cortices do not determine reaction times to tactile stimuli.
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Affiliation(s)
- Markus Ploner
- Department of Neurology, Heinrich-Heine-University, Düsseldorf, Germany.
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Kida T, Inui K, Wasaka T, Akatsuka K, Tanaka E, Kakigi R. Time-Varying Cortical Activations Related to Visual–Tactile Cross-Modal Links in Spatial Selective Attention. J Neurophysiol 2007; 97:3585-96. [PMID: 17360823 DOI: 10.1152/jn.00007.2007] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The neural mechanisms underlying unimodal spatial attention have long been studied, but the cortical processes underlying cross-modal links remain a matter of debate. To reveal the cortical processes underlying the cross-modal links between vision and touch in spatial attention, we recorded magnetoencephalographic (MEG) responses to electrocutaneous stimuli when subjects directed attention to an electrocutaneous or visual stimulus presented randomly in the left or right space. Neural responses recorded around the bilateral sylvian fissures at 85 and 100 ms after the electrocutaneous stimulus were significantly enhanced by spatial attention in both the touch-irrelevant and -relevant modalities. Source analysis revealed that the sylvian responses were generated in the secondary somatosensory cortex (SII). An early response, M50c, generated in the contralateral primary somatosensory cortex (SI), was not modulated by attention. There were no significant attentional changes in the source location or magnetic field distribution, suggesting attentional facilitation of the neural activity in SII itself, rather than a tonic bias effect or overlapping of separate neuronal populations. The results show that spatial attention enhances responses to tactile inputs in SII, independent of sensory modality attended. The underlying mechanism remains to be determined, but may be an increase in gain.
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Affiliation(s)
- Tetsuo Kida
- Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Aichi, Japan.
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