Interhemispheric connectivity between distinct motor regions as a window into bimanual coordination

2012 ◽  
Vol 107 (7) ◽  
pp. 1791-1794 ◽  
Author(s):  
Mark R. Hinder
Keyword(s):  
Motor Performance ◽  
Magnetic Stimulation ◽  
Bimanual Coordination ◽  
Imaging Techniques ◽  
Neural Correlates ◽  
Bimanual Movement ◽  
Interhemispheric Connectivity ◽  
Human Motor ◽  
Motor Actions ◽  
Bimanual Tapping

Performing coordinated bimanual movement is a fundamental feature of the human motor system, with imaging techniques revealing the involvement of an extensive network of motor regions in both hemispheres. Using transcranial magnetic stimulation, Liuzzi et al. ( J Neurosci 31: 9111–9117, 2011) recently extended our understanding of the neural correlates of motor actions by showing that the nature of the interhemispheric connectivity between primary and premotor regions may influence motor performance during a bimanual tapping task.

scholarly journals Monitoring Coordination during Bimanual Movements: Where Is the Mastermind?

2010 ◽  
Vol 22 (3) ◽  
pp. 526-542 ◽  
Author(s):  
Julie Duque ◽  
Marco Davare ◽  
Ludovic Delaunay ◽  
Benvenuto Jacob ◽  
Ralf Saur ◽  
...  
Keyword(s):  
Bimanual Coordination ◽  
Primary Motor Cortex ◽  
Right Hemisphere ◽  
Superior Temporal Gyrus ◽  
Neural Correlates ◽  
Common Goal ◽  
Bimanual Movements ◽  
Bimanual Actions ◽  
Human Motor ◽  
The Right

One remarkable aspect of the human motor repertoire is the multitude of bimanual actions it contains. Still, the neural correlates of coordinated movements, in which the two hands share a common goal, remain debated. To address this issue, we designed two bimanual circling tasks that differed only in terms of goal conceptualization: a “coordination” task that required movements of both hands to adapt to each other to reach a common goal and an “independent” task that imposed a separate goal to each hand. fMRI allowed us to pinpoint three areas located in the right hemisphere that were more strongly activated in the coordination condition: the superior temporal gyrus (STG), the SMA, and the primary motor cortex (M1). We then used transcranial magnetic stimulation (TMS) to disrupt transiently the function of those three regions to determine their causal role in bimanual coordination. Right STG virtual lesions impaired bimanual coordination, whereas TMS to right M1 enhanced hand independence. TMS over SMA, left STG, or left M1 had no effect. The present study provides direct insight into the neural correlates of coordinated bimanual movements and highlights the role of right STG in such bimanual movements.

scholarly journals Anterior corpus callosum modulates symmetric forelimb movements during spontaneous food handling behavior of rats

2019 ◽  
Author(s):  
Masakazu Igarashi ◽  
Yumiko Akamine ◽  
Jeffery R Wickens
Keyword(s):  
Corpus Callosum ◽  
Bimanual Coordination ◽  
Anterior Part ◽  
Bimanual Movement ◽  
Food Handling ◽  
Axonal Conduction ◽  
Bimanual Movements ◽  
Electrophysiological Recordings ◽  
Neural Transmission ◽  
Motor Actions

AbstractBimanual motor actions, such as threading a needle, require coordination of the movements of each hand according to the state of the other hand. By connecting homologous cortical regions between the two cerebral hemispheres, the corpus callosum is thought to play a key role in such bimanual coordination. However, direct experimental evidence of the contribution of the corpus callosum to natural behaviors requiring bimanual coordination, such as feeding, is lacking. We investigated the hypothesis that the corpus callosum mediates bimanual movements during food-handling behavior. We first traced the forelimb-related components of the motor corpus callosum in Long-Evans rats, and found that the callosal fiber bundle from the forelimb motor areas passes through the anterior part of the corpus callosum. We then confirmed by electrophysiological recordings that blocking the axonal conduction of fibers in the anterior corpus callosum reduced neural transmission between cortical forelimb areas. The causal role of corpus callosum in bimanual coordination was then tested by analyzing forelimb kinematics during object manipulation, before and after blocking axonal conduction in the anterior corpus callosum. We found the frequency of occurrence of symmetric bimanual movements was reduced by inhibition of anterior corpus callosum. In contrast, asymmetric bimanual movement was increased. Our findings suggest that the anterior corpus callosum coordinates the direction of bimanual movement.

MEP Analysis of Hand Motor Imagery with Bimanual Coordination Under Transcranial Magnetic Stimulation

2016 ◽  
Vol 20 (3) ◽  
pp. 462-466 ◽  
Author(s):  
Kun Wang ◽  
◽  
Zhongpeng Wang ◽  
Peng Zhou ◽  
Hongzhi Qi ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Motor Imagery ◽  
Magnetic Stimulation ◽  
Bimanual Coordination ◽  
Bimanual Movement ◽  
Stroke Patients ◽  
Movement Coordination ◽  
Motor Disability ◽  
Contralateral Hand ◽  
The Right

Stroke is one of the leading causes worldwide of motor disability in adults. Motor imagery is a rehabilitation technique for potentially treating the results of stroke. Based on bimanual movement coordination, we designed hand motor imagery experiments. Transcranial magnetic stimulation (TMS) was applied to the left motor cortex to produce motorevoked potentials (MEP) in the first dorsal interosseous (FDI) of the right hand. Ten subjects were required to perform three different motor imagery tasks involving the twisting of a bottle cap. The results showed that contralateral hand imagery evoked the largest MEP, meaning that the brain's motor area was activated the most. This work may prove to be significant as a reference in designing motor imagery therapy protocols for stroke patients.

Anticipation and timing in human motor performance.

1968 ◽  
Vol 70 (6, Pt.1) ◽  
pp. 631-646 ◽  
Author(s):  
Richard A. Schmidt
Keyword(s):  
Motor Performance ◽  
Human Motor

Reorganisation in human motor cortex

1995 ◽  
Vol 73 (2) ◽  
pp. 218-222 ◽  
Author(s):  
M. C. Ridding ◽  
J. C Rothwell
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Motor Cortex ◽  
Magnetic Stimulation ◽  
Voluntary Contraction ◽  
Short Latency ◽  
Human Motor Cortex ◽  
Amputation Stump ◽  
Human Motor

Transcranial magnetic stimulation over the motor cortex was used to construct a map of the effective sites on the scalp from which short-latency electromyogram responses could be evoked in muscles proximal to either an amputation stump (two subjects) or an ischemically anesthetized forearm (two subjects). At rest, the maps were larger and the responses bigger when stimulating contralateral to the amputated arm or after anesthesia than they were in the intact arm or before anesthesia. However, this difference disappeared when the maps were constructed during a small tonic voluntary contraction of the target muscle. We conclude that reorganisation of the corticospinal projection to a muscle at rest may no longer be present during activity. If so, this calls into question the possible functional benefits of such reorganisation in the control of movement after peripheral damage.Key words: motor cortex, magnetic stimulation, amputation, ischemia.

scholarly journals STUDENTS’ PHYSICAL QUALITY "JUMPING" IN NON-PHYSICAL EDUCATION UNIVERSITIES

2021 ◽  
Vol 5 ◽  
pp. 104-108
Author(s):  
Valery A. Lopatin
Keyword(s):  
Comparative Analysis ◽  
Physical Education ◽  
Physical Culture ◽  
Test Results ◽  
Physical Quality ◽  
Sports Clubs ◽  
Literary Sources ◽  
Practical Research ◽  
Human Motor ◽  
Motor Actions

Students’ physical quality “jumping" in non-physical education university is discussed in the article. Complementary characteristics of "jumping ability" described by scientists in different years are given and literary sources of scientists on this problem are analyzed. The article provides the results of practical research based on the Abalakov’s test for measuring jumping ability among students at elective physical culture lessons and a comparative analysis of the test results is presented. Sport that shows the highest jumping ability as an important component of harmony in human motor actions is revealed. Activities at University sports clubs are recommended.

scholarly journals Beat Patterns Determine Inter-Hand Differences in Synchronization Error in a Bimanual Coordination Tapping Task

i-Perception ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 204166952110538
Author(s):  
Yuka Saito ◽  
Tomoki Maezawa ◽  
Jun I. Kawahara
Keyword(s):  
Bimanual Coordination ◽  
Synchronization Error ◽  
Left Hand ◽  
Synchronization Errors ◽  
Right Hand ◽  
Beat Pattern ◽  
Timing System ◽  
Apparent Inconsistency ◽  
The Right ◽  
Bimanual Tapping

A previous study reported the unique finding that people tapping a beat pattern with the right hand produce larger negative synchronization error than when tapping with the left hand or other effectors, in contrast to previous studies that have shown that the hands tap patterns simultaneously without any synchronization errors. We examined whether the inter-hand difference in synchronization error occurred due to handedness or to a specificity of the beat pattern employed in that study. Two experiments manipulated the hand–beat assignments. A comparison between the identical beat to the pacing signal and a beat with a longer interval excluded the handedness hypothesis and demonstrated that beat patterns with relatively shorter intervals were tapped earlier (Experiment 1). These synchronization errors were not local but occurred consistently throughout the beat patterns. Experiment 2 excluded alternative explanations. These results indicate that the apparent inconsistency in previous studies was due to the specificity of the beat patterns, suggesting that a beat pattern with a relatively shorter interval between hands is tapped earlier than beats with longer intervals. Our finding that the bimanual tapping of different beat patterns produced different synchronization errors suggests that the notion of a central timing system may need to be revised.

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