The dominant and nondominant arms are specialized for stabilizing different features of task performance

Wang, Jinsung; Sainburg, Robert L.

doi:10.1007/s00221-007-0936-x

Cited by 155 publications

(109 citation statements)

References 45 publications

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“…15 Therefore, in addition to calculating the VRIs for right-and left-side only muscles, the VRIs for dominant/non-dominant hand were calculated. While the 'best' muscles determined during the Jendrassik based upon handedness were inconsistent with those determined during ipsilateral/contralateral control, the SI values for the two muscle groups under consideration had the same mean for the bilateral muscles and the 'best' group considered during the left muscles only is consistent with the 'best' group for handedness.…”

Section: Discussionmentioning

confidence: 99%

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Reliability of surface EMG as an assessment tool for trunk activity and potential to determine neurorecovery in SCI

et al. 2014

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Study Design: Reliability and validity study. Objective: This study investigates the responsiveness and reliability of the brain motor control assessment (BMCA) as a standardized neurophysiological assessment tool to: (i) characterize trunk neural activity in neurologically-intact controls; (ii) measure and quantify neurorecovery of trunk after spinal cord injury (SCI). Setting: Kessler Foundation Research Center, West Orange, NJ. Methods: A standardized BMCA protocol was performed to measure surface electromyography (sEMG) recordings for seven bilateral trunk muscles on 15 able-bodied controls during six maneuvers (inhalation, exhalation, neck flexion, jendrassik, unilateral grip). Additionally, sEMG recordings were analyzed for one chronic SCI individual before electrical stimulation (ES), after ES of the lower extremities while supine, and after active stand training using body-weight support with bilateral ES. sEMG recordings were collected on bilateral erector spinae, internal and external obliques, upper and middle trapezius, biceps and triceps. For each maneuver a voluntary response index was calculated: incorporating the magnitude of sEMG signal and a similarity index (SI), which quantifies the distribution of activity across all muscles. Results: Among all maneuvers, the SI presented reproducible assessment of trunk-motor function within (ICC: 0.860-0.997) and among (P ⩾ 0.22) able-bodied individuals. In addition, potential changes were measured in a chronic SCI individual after undergoing two intensive ES protocols. Conclusion:The BMCA provides reproducible characterization of trunk activity in able-bodied individuals, lending credence for its use in neurophysiological assessment of motor control. Additionally, the BMCA as an assessment tool to measure neurorecovery in an individual with chronic SCI after intense ES interventions was demonstrated.

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Section: Discussionmentioning

confidence: 99%

“…As handedness has been shown to have a significant impact in upper-extremity muscle activity, [14][15][16][17][18][19] the VRIs were All subjects were male (29 ± 4 years of age, 22-36 years of age). Mean height was 177.9 ± 9.3 cm and mean weight was 80.9 ± 8.1 kg.…”

Section: Subjects and Assessment Protocolmentioning

confidence: 99%

Reliability of surface EMG as an assessment tool for trunk activity and potential to determine neurorecovery in SCI

et al. 2014

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“…During this process, competition arises between the alternative solutions, which include the two arms, and the executive system might selectively facilitate or inhibit the access of each arm controller to opposite-arm information, depending on task requirements for control of such factors as dynamic efficiency and limb impedance (Sainburg 2002), thereby reducing redundant (and competing) solutions when the task-space is shared by both arms. According to this idea, asymmetry in transfer occurs because the two arm controllers are differentially proficient for controlling different features of movement (i.e., dominant arm for controlling movement trajectory, nondominant arm for specifying final limb posture; Sainburg and Kalakanis 2000;Bagesteiro and Sainburg 2003;Wang and Sainburg 2007b), and the motor control system determines the direction of information flow depending on the compatibility between task requirements and arm proficiency. Thus, when the left arm performs a visuomotor adaptation task in a left workspace location following initial training with the right arm in a right workspace location, for example, the motor control system allows the nondominant controller to access all of the available information obtained during the right arm training, as indicated by a transfer of direction information from the right to the left arm (Wang and Sainburg 2006b), probably because the left arm is performing the task in a workspace in which the control system considers using this arm as a more affordable solution, as compared with using the right arm (Bryden & Roy, 2006;Gabbard & Helbig, 2004;Gabbard & Rabb, 2000).…”

Section: Discussionmentioning

confidence: 99%

A dissociation between visual and motor workspace inhibits generalization of visuomotor adaptation across the limbs

Wang

2008

Exp Brain Res

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We have previously shown that the pattern of interlimb transfer following visuomotor adaptation depends on whether the two arms share task-space at a given workspace location: When the two arms adapted to a novel visuomotor rotation in unshared, lateral workspaces, transfer of movement direction information occurred symmetrically (i.e., from dominant to nondominant arm, and vice versa). When the two arms shared the same task-space, however, transfer of the same information became asymmetric (i.e., only from dominant to nondominant arm). In the present study, I investigated the effect of a conflict between visual and proprioceptive information of task-space on the pattern of interlimb transfer, by dissociating visual and motor workspaces. I hypothesized that the pattern of interlimb transfer would be determined by the way the motor control system uses available sensory information, and predicted that depending on whether the system relied more on vision or proprioception, transfer would occur either symmetrically or asymmetrically. Surprisingly, the results indicated that despite substantial adaptation to a novel visuomotor rotation, no transfer occurred across the arms when the visual and motor workspaces were dissociated in space. Based on this finding, I suggest that when a conflict exists between visual and proprioceptive information with respect to the sharing of the given task-space by the two arms, it interferes with executive decisions made by the motor control system in determining hand dominance at a given workspace, which results in a lack of transfer across the arms.

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“…One is that the left hemisphere may be more efficient in error correction using sensory feedback. The other is that the left hemisphere may permit more precise control of net forces and force durations (compare also [80,81]). …”

Section: Mastering the Functional Parameters Of Percussive Actions: Ementioning

confidence: 99%

Functional mastery of percussive technology in nut-cracking and stone-flaking actions: experimental comparison and implications for the evolution of the human brain

Bril¹,

Smaers

Steele

et al. 2012

Phil. Trans. R. Soc. B

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Various authors have suggested behavioural similarities between tool use in early hominins and chimpanzee nut cracking, where nut cracking might be interpreted as a precursor of more complex stone flaking. In this paper, we bring together and review two separate strands of research on chimpanzee and human tool use and cognitive abilities. Firstly, and in the greatest detail, we review our recent experimental work on behavioural organization and skill acquisition in nut-cracking and stoneknapping tasks, highlighting similarities and differences between the two tasks that may be informative for the interpretation of stone tools in the early archaeological record. Secondly, and more briefly, we outline a model of the comparative neuropsychology of primate tool use and discuss recent descriptive anatomical and statistical analyses of anthropoid primate brain evolution, focusing on corticocerebellar systems. By juxtaposing these two strands of research, we are able to identify unsolved problems that can usefully be addressed by future research in each of these two research areas.

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The dominant and nondominant arms are specialized for stabilizing different features of task performance

Cited by 155 publications

References 45 publications

Reliability of surface EMG as an assessment tool for trunk activity and potential to determine neurorecovery in SCI

Reliability of surface EMG as an assessment tool for trunk activity and potential to determine neurorecovery in SCI

A dissociation between visual and motor workspace inhibits generalization of visuomotor adaptation across the limbs

Functional mastery of percussive technology in nut-cracking and stone-flaking actions: experimental comparison and implications for the evolution of the human brain

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