1
|
Meltzer JA, Sivaratnam G, Deschamps T, Zadeh M, Li C, Farzan F, Francois-Nienaber A. Contrasting MEG effects of anodal and cathodal high-definition TDCS on sensorimotor activity during voluntary finger movements. FRONTIERS IN NEUROIMAGING 2024; 3:1341732. [PMID: 38379832 PMCID: PMC10875011 DOI: 10.3389/fnimg.2024.1341732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 01/15/2024] [Indexed: 02/22/2024]
Abstract
Introduction Protocols for noninvasive brain stimulation (NIBS) are generally categorized as "excitatory" or "inhibitory" based on their ability to produce short-term modulation of motor-evoked potentials (MEPs) in peripheral muscles, when applied to motor cortex. Anodal and cathodal stimulation are widely considered excitatory and inhibitory, respectively, on this basis. However, it is poorly understood whether such polarity-dependent changes apply for neural signals generated during task performance, at rest, or in response to sensory stimulation. Methods To characterize such changes, we measured spontaneous and movement-related neural activity with magnetoencephalography (MEG) before and after high-definition transcranial direct-current stimulation (HD-TDCS) of the left motor cortex (M1), while participants performed simple finger movements with the left and right hands. Results Anodal HD-TDCS (excitatory) decreased the movement-related cortical fields (MRCF) localized to left M1 during contralateral right finger movements while cathodal HD-TDCS (inhibitory), increased them. In contrast, oscillatory signatures of voluntary motor output were not differentially affected by the two stimulation protocols, and tended to decrease in magnitude over the course of the experiment regardless. Spontaneous resting state oscillations were not affected either. Discussion MRCFs are thought to reflect reafferent proprioceptive input to motor cortex following movements. Thus, these results suggest that processing of incoming sensory information may be affected by TDCS in a polarity-dependent manner that is opposite that seen for MEPs-increases in cortical excitability as defined by MEPs may correspond to reduced responses to afferent input, and vice-versa.
Collapse
Affiliation(s)
- Jed A. Meltzer
- Rotman Research Institute, Baycrest Academy for Research and Education, Toronto, ON, Canada
- Departments of Psychology and Speech-language Pathology, University of Toronto, Toronto, ON, Canada
| | - Gayatri Sivaratnam
- Rotman Research Institute, Baycrest Academy for Research and Education, Toronto, ON, Canada
| | - Tiffany Deschamps
- Rotman Research Institute, Baycrest Academy for Research and Education, Toronto, ON, Canada
| | - Maryam Zadeh
- Rotman Research Institute, Baycrest Academy for Research and Education, Toronto, ON, Canada
| | - Catherine Li
- Rotman Research Institute, Baycrest Academy for Research and Education, Toronto, ON, Canada
| | - Faranak Farzan
- School of Mechatronic Systems Engineering, Simon Fraser University, Burnaby, BC, Canada
| | - Alex Francois-Nienaber
- Rotman Research Institute, Baycrest Academy for Research and Education, Toronto, ON, Canada
| |
Collapse
|
2
|
Monroe DC, Berry NT, Fino PC, Rhea CK. A Dynamical Systems Approach to Characterizing Brain-Body Interactions during Movement: Challenges, Interpretations, and Recommendations. SENSORS (BASEL, SWITZERLAND) 2023; 23:6296. [PMID: 37514591 PMCID: PMC10385586 DOI: 10.3390/s23146296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/16/2023] [Accepted: 06/20/2023] [Indexed: 07/30/2023]
Abstract
Brain-body interactions (BBIs) have been the focus of intense scrutiny since the inception of the scientific method, playing a foundational role in the earliest debates over the philosophy of science. Contemporary investigations of BBIs to elucidate the neural principles of motor control have benefited from advances in neuroimaging, device engineering, and signal processing. However, these studies generally suffer from two major limitations. First, they rely on interpretations of 'brain' activity that are behavioral in nature, rather than neuroanatomical or biophysical. Second, they employ methodological approaches that are inconsistent with a dynamical systems approach to neuromotor control. These limitations represent a fundamental challenge to the use of BBIs for answering basic and applied research questions in neuroimaging and neurorehabilitation. Thus, this review is written as a tutorial to address both limitations for those interested in studying BBIs through a dynamical systems lens. First, we outline current best practices for acquiring, interpreting, and cleaning scalp-measured electroencephalography (EEG) acquired during whole-body movement. Second, we discuss historical and current theories for modeling EEG and kinematic data as dynamical systems. Third, we provide worked examples from both canonical model systems and from empirical EEG and kinematic data collected from two subjects during an overground walking task.
Collapse
Affiliation(s)
- Derek C Monroe
- Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Nathaniel T Berry
- Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
- Under Armour, Inc., Innovation, Baltimore, MD 21230, USA
| | - Peter C Fino
- Department of Health and Kinesiology, University of Utah, Salt Lake City, UT 84112, USA
| | - Christopher K Rhea
- College of Health Sciences, Old Dominion University, Norfolk, VA 23508, USA
| |
Collapse
|
3
|
Schellekens W, Thio M, Badde S, Winawer J, Ramsey N, Petridou N. A touch of hierarchy: population receptive fields reveal fingertip integration in Brodmann areas in human primary somatosensory cortex. Brain Struct Funct 2021; 226:2099-2112. [PMID: 34091731 PMCID: PMC8354965 DOI: 10.1007/s00429-021-02309-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 05/26/2021] [Indexed: 12/03/2022]
Abstract
Several neuroimaging studies have shown the somatotopy of body part representations in primary somatosensory cortex (S1), but the functional hierarchy of distinct subregions in human S1 has not been adequately addressed. The current study investigates the functional hierarchy of cyto-architectonically distinct regions, Brodmann areas BA3, BA1, and BA2, in human S1. During functional MRI experiments, we presented participants with vibrotactile stimulation of the fingertips at three different vibration frequencies. Using population Receptive Field (pRF) modeling of the fMRI BOLD activity, we identified the hand region in S1 and the somatotopy of the fingertips. For each voxel, the pRF center indicates the finger that most effectively drives the BOLD signal, and the pRF size measures the spatial somatic pooling of fingertips. We find a systematic relationship of pRF sizes from lower-order areas to higher-order areas. Specifically, we found that pRF sizes are smallest in BA3, increase slightly towards BA1, and are largest in BA2, paralleling the increase in visual receptive field size as one ascends the visual hierarchy. Additionally, we find that the time-to-peak of the hemodynamic response in BA3 is roughly 0.5 s earlier compared to BA1 and BA2, further supporting the notion of a functional hierarchy of subregions in S1. These results were obtained during stimulation of different mechanoreceptors, suggesting that different afferent fibers leading up to S1 feed into the same cortical hierarchy.
Collapse
Affiliation(s)
- W Schellekens
- Department of Radiology, Center for Image Sciences, UMC Utrecht, Q101.132, P.O.Box 85500, 3508 GA, Utrecht, The Netherlands.
| | - M Thio
- Department of Radiology, Center for Image Sciences, UMC Utrecht, Q101.132, P.O.Box 85500, 3508 GA, Utrecht, The Netherlands
| | - S Badde
- Department of Psychology and Center of Neural Science, NYU, New York, USA
| | - J Winawer
- Department of Psychology and Center of Neural Science, NYU, New York, USA
| | - N Ramsey
- Department of Neurology and Neurosurgery, UMC Utrecht, Utrecht, The Netherlands
| | - N Petridou
- Department of Radiology, Center for Image Sciences, UMC Utrecht, Q101.132, P.O.Box 85500, 3508 GA, Utrecht, The Netherlands
| |
Collapse
|
4
|
Tewarie P, Liuzzi L, O'Neill GC, Quinn AJ, Griffa A, Woolrich MW, Stam CJ, Hillebrand A, Brookes MJ. Tracking dynamic brain networks using high temporal resolution MEG measures of functional connectivity. Neuroimage 2019; 200:38-50. [DOI: 10.1016/j.neuroimage.2019.06.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 05/12/2019] [Accepted: 06/03/2019] [Indexed: 11/29/2022] Open
|
5
|
Motor Action Execution in Reaction-Time Movements: Magnetoencephalographic Study. Am J Phys Med Rehabil 2019; 98:771-776. [PMID: 30920964 DOI: 10.1097/phm.0000000000001187] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Reaction-time movements are internally planned in the brain. Presumably, proactive control in reaction-time movements appears as an inhibitory phase preceding movement execution. We identified the brain activity of reaction-time movements in close proximity to movement onset and compared it with similar self-paced voluntary movements without external command. DESIGN We recorded 18 healthy participants performing reaction-time and self-paced fast index finger abductions with 306-sensor magnetoencephalography and electromyography. Reaction-time movements were performed as responses to cutaneous electrical stimulation delivered on the hand radial nerve area. Motor field and movement-evoked field 1 corresponding to the sensorimotor cortex activity during motor execution and afferent feedback after the movement were analyzed with Brainstorm's scouts using regions of interest analysis. RESULTS Primary motor and somato sensory cortices were active before and after movement onset. During reaction-time movements, primary motor and somato sensory cortices showed higher activation compared with self-paced movements. In primary motor cortex, stronger preparatory activity was seen in self-paced than in reaction time task. CONCLUSIONS Both primary motor and somato sensory cortices participated in the movement execution and in the prediction of sensory consequences of movement. Cutaneous stimulation facilitated cortical activation during motor field after reaction-time movements, implying the applicability of cutaneous stimulation in motor rehabilitation.
Collapse
|
6
|
Kim JH, Kim BS, Hwang SJ, Chang WS, Kim KW, Kwon HC, Lee YH, Chang JW. Symptom-associated change of motor-related neuromagnetic fields in a patient with multiple sclerosis: A case report. J Clin Neurosci 2018; 50:115-122. [PMID: 29439908 DOI: 10.1016/j.jocn.2018.01.060] [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: 11/14/2017] [Accepted: 01/08/2018] [Indexed: 11/18/2022]
Abstract
The objective of this study was to investigate functional abnormalities of the brain in a patient with multiple sclerosis (MS) by using magnetoencephalography (MEG) and a finger-tapping task. A 46-year-old woman that presented with motor weakness of left hand and was diagnosed with MS. Conventional magnetic resonance imaging demonstrated a white matter lesion with hyperintensity on T2-weighted images in the right motor area. MEG recordings were performed during the period of motor weakness and after clinical improvement. Neuromagnetic brain activation was elicited by a simple, visually cued finger movement. The Equivalent current dipole (ECD) strength of the movement-evoked field (MEF) in the affected hemisphere was significantly decreased relative to the unaffected hemisphere. After improvement in motor weakness, we found that the lower amplitude of the readiness field and decreased ECD strength of the MEF observed in affected hemisphere during motor weakness had recovered. Analysis of motor-related neuromagnetic fields revealed that MEG may be used to detect diffuse changes in the brain that are not observable by conventional imaging of white matter regions in MS. We further found that brain activities can change after improvement in motor weakness.
Collapse
Affiliation(s)
- Ji Hee Kim
- Department of Neurosurgery, Hallym University Sacred Heart Hospital, Anyang, Gyeonggi-do, Republic of Korea
| | - Bong Soo Kim
- EIT/LOFUS R&D Center, International St. Mary's Hospital, Catholic Kwandong University, Incheon, Republic of Korea
| | - Su Jeong Hwang
- Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Won Seok Chang
- Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ki Woong Kim
- Korean Research Institute of Standard and Science (KRISS), Daejeon, Republic of Korea
| | - Hyuk Chan Kwon
- Korean Research Institute of Standard and Science (KRISS), Daejeon, Republic of Korea
| | - Yong Ho Lee
- Korean Research Institute of Standard and Science (KRISS), Daejeon, Republic of Korea
| | - Jin Woo Chang
- Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.
| |
Collapse
|
7
|
Nakata H, Sakamoto K, Honda Y, Kakigi R. Temporal dynamics of neural activity in motor execution and inhibition processing. Eur J Neurosci 2015; 41:1448-58. [DOI: 10.1111/ejn.12889] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 03/04/2015] [Accepted: 03/06/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroki Nakata
- Department of Integrative Physiology; National Institute for Physiological Sciences; Okazaki Japan
- Department of Health Sciences; Faculty of Human Life and Environment; Nara Women's University; Kitauoya-Nishi Machi Nara City 630-8506 Japan
| | - Kiwako Sakamoto
- Department of Integrative Physiology; National Institute for Physiological Sciences; Okazaki Japan
| | - Yukiko Honda
- Department of Integrative Physiology; National Institute for Physiological Sciences; Okazaki Japan
| | - Ryusuke Kakigi
- Department of Integrative Physiology; National Institute for Physiological Sciences; Okazaki Japan
| |
Collapse
|