Task complexity relates to activation of cortical motor areas during uni- and bimanual performance: A functional NIRS study

Holper, Lisa; Biallas, Martin; Wolf, Martin

doi:10.1016/j.neuroimage.2009.03.027

Cited by 87 publications

(81 citation statements)

References 71 publications

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“…These activation patterns fit well with the view that bilateral sensorimotor regions take charge of a relatively high level of motor control in complex motor behavior 17,18) . Particularly, increases of movement sequence complexity showed an association with pronounced increases in the ipsilateral network, particularly in the ipsilateral brain regions.…”

Section: Discussionsupporting

confidence: 86%

Changes in Cerebral and Cerebellar Activation Patterns Induced by Short-term Sequence Learning of a Serial Reaction Time Task: an fMRI Study

Kwon¹,

Park

2013

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to investigate the neural mechanisms of the brain regions activated by training dependent changes in large-scale motor networks induced by performance of sequential motor learning, using functional MRI.[Method] Twenty healthy subjects were recruited, who were randomly allocated to the training or control group. The training group performed a serial reaction time task for two weeks, whereas the control group did not receive any training. Behavioral assessment was conducted in terms of response accuracy and reaction time during pre-and post-fMRI scanning.[Results] The training group showed a significant improvement in motor performance. On the other hand, the control group also showed a slight improvement of performance. After the two-week training, activations of all areas observed on the initial fMRI showed a remarkable decrease, whereas no differences or slight increases were observed in the change of activation in the control group. In the cerebellar activation of the training group, the most prominent change was observed in the medial cerebellar area, and contralateral deep cerebellar nuclei were newly activated.[Conclusion] Our findings suggest that brain reorganization for sequential motor learning was induced by motor sequence acquisition, and that decreased cerebral and increased cerebellar activity during explicit learning might be related to familiarity with the task.

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Section: Discussionsupporting

confidence: 86%

Changes in Cerebral and Cerebellar Activation Patterns Induced by Short-term Sequence Learning of a Serial Reaction Time Task: an fMRI Study

Kwon¹,

Park

2013

J Phys Ther Sci

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“…A typical change with the opposite trends of the signals change which were measured at the two wave− lengths located on the opposite sides of the isobestic point in all statistical moments can be observed. These opposite changes in the motor cortex activation are caused by chan− ges of the absorption coefficients (for 687 nm and 832 nm wavelengths) which result from increase in oxyhemoglobin concentration and decrease in deoxyhemoglobin con− centration [59][60][61][62][63][64][65][66][67].…”

Section: In Vivo Experimentsmentioning

confidence: 99%

Time-resolved multi-channel optical system for assessment of brain oxygenation and perfusion by monitoring of diffuse reflectance and fluorescence

Milej

Gerega

Kacprzak

et al. 2014

Opto-Electronics Review

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Time-resolved near-infrared spectroscopy is an optical technique which can be applied in tissue oxygenation assessment. In the last decade this method is extensively tested as a potential clinical tool for noninvasive human brain function monitoring and imaging. In the present paper we show construction of an instrument which allows for: (i) estimation of changes in brain tissue oxygenation using two-wavelength spectroscopy approach and (ii) brain perfusion assessment with the use of single-wavelength reflectometry or fluorescence measurements combined with ICG-bolus tracking. A signal processing algorithm based on statistical moments of measured distributions of times of flight of photons is implemented. This data analysis method allows for separation of signals originating from extra- and intracerebral tissue compartments. In this paper we present compact and easily reconfigurable system which can be applied in different types of time-resolved experiments: two-wavelength measurements at 687 and 832 nm, single wavelength reflectance measurements at 760 nm (which is at maximum of ICG absorption spectrum) or fluorescence measurements with excitation at 760 nm. Details of the instrument construction and results of its technical tests are shown. Furthermore, results of in-vivo measurements obtained for various modes of operation of the system are presented.

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“…One such portable and low-cost neuroimaging modality is functional near-infrared spectroscopy (fNIRS), previously used to study brain function in healthy subjects [33][34][35][36][37][38][39] and individuals affected by a wide range of central nervous system pathologies such as stroke, depression, cerebral palsy, and Alzheimer's disease. [40][41][42][43][44] Though this optical technology is limited to cortical imaging at a modest spatial resolution, it can potentially offer high activation-related signal detection sensitivity, high-temporal resolution, and relative robustness to motion artifacts.…”

mentioning

confidence: 99%

Functional near-infrared spectroscopy maps cortical plasticity underlying altered motor performance induced by transcranial direct current stimulation

et al. 2013

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Abstract. Transcranial direct current stimulation (tDCS) of the human sensorimotor cortex during physical rehabilitation induces plasticity in the injured brain that improves motor performance. Bi-hemispheric tDCS is a noninvasive technique that modulates cortical activation by delivering weak current through a pair of anodal-cathodal (excitation-suppression) electrodes, placed on the scalp and centered over the primary motor cortex of each hemisphere. To quantify tDCS-induced plasticity during motor performance, sensorimotor cortical activity was mapped during an event-related, wrist flexion task by functional near-infrared spectroscopy (fNIRS) before, during, and after applying both possible bi-hemispheric tDCS montages in eight healthy adults. Additionally, torque applied to a lever device during isometric wrist flexion and surface electromyography measurements of major muscle group activity in both arms were acquired concurrently with fNIRS. This multiparameter approach found that hemispheric suppression contralateral to wrist flexion changed resting-state connectivity from intra-hemispheric to inter-hemispheric and increased flexion speed (p < 0.05). Conversely, exciting this hemisphere increased opposing muscle output resulting in a decrease in speed but an increase in accuracy (p < 0.05 for both). The findings of this work suggest that tDCS with fNIRS and concurrent multimotor measurements can provide insights into how neuroplasticity changes muscle output, which could find future use in guiding motor rehabilitation. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Task complexity relates to activation of cortical motor areas during uni- and bimanual performance: A functional NIRS study

Cited by 87 publications

References 71 publications

Changes in Cerebral and Cerebellar Activation Patterns Induced by Short-term Sequence Learning of a Serial Reaction Time Task: an fMRI Study

Changes in Cerebral and Cerebellar Activation Patterns Induced by Short-term Sequence Learning of a Serial Reaction Time Task: an fMRI Study

Time-resolved multi-channel optical system for assessment of brain oxygenation and perfusion by monitoring of diffuse reflectance and fluorescence

Functional near-infrared spectroscopy maps cortical plasticity underlying altered motor performance induced by transcranial direct current stimulation

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