Neural motor control differs between bimanual common-goal vs. bimanual dual-goal tasks
Neural motor control differs between bimanual common-goal vs. bimanual dual-goal tasks
Coordinating bimanual movements is essential for everyday activities. Two common types of bimanual tasks are common goal, where two arms share a united goal, and dual goal, which involves independent goals for each arm. Here, we examine how the neural control mechanisms differ between these two types of bimanual tasks. Ten non-disabled individuals performed isometric force tasks of the elbow at 10% of their maximal voluntary force in both bimanual common and dual goals as well as unimanual conditions. Using transcranial magnetic stimulation, we concurrently examined the intracortical inhibitory modulation (short-interval intracortical inhibition, SICI) as well as the interlimb coordination strategies utilized between common- vs. dual-goal tasks. Results showed a reduction of SICI in both hemispheres during dual-goal compared to common-goal tasks (dominant hemisphere: P = 0.04, non-dominant hemisphere: P = 0.03) and unimanual tasks (dominant hemisphere: P = 0.001, non-dominant hemisphere: P = 0.001). For the common-goal task, a reduction of SICI was only seen in the dominant hemisphere compared to unimanual tasks (P = 0.03). Behaviorally, two interlimb coordination patterns were identified. For the common-goal task, both arms were organized into a cooperative “give and take” movement pattern. Control of the non-dominant arm affected stabilization of bimanual force (R2 = 0.74, P = 0.001). In contrast, for the dual-goal task, both arms were coupled together in a positive fashion and neither arm affected stabilization of bimanual force (R2 = 0.31, P = 0.1). The finding that intracortical inhibition and interlimb coordination patterns were different based on the goal conceptualization of bimanual tasks has implications for future research.
Bimanual coordination, Interlimb force coordination, Motor control, Short-interval intracortical inhibition (SICI), Task goal
1-12
Liao, Wan wen
305704a4-a572-41bf-8127-6aa2f98ab735
Whitall, Jill
9761aefb-be80-4270-bc1f-0e726399376e
Barton, Joseph E.
34f40e05-3918-426f-a2e3-434559d0c282
Mccombe Waller, Sandy
91ffc714-a088-428d-b92c-9b0d70f286da
Liao, Wan wen
305704a4-a572-41bf-8127-6aa2f98ab735
Whitall, Jill
9761aefb-be80-4270-bc1f-0e726399376e
Barton, Joseph E.
34f40e05-3918-426f-a2e3-434559d0c282
Mccombe Waller, Sandy
91ffc714-a088-428d-b92c-9b0d70f286da
Liao, Wan wen, Whitall, Jill, Barton, Joseph E. and Mccombe Waller, Sandy
(2018)
Neural motor control differs between bimanual common-goal vs. bimanual dual-goal tasks.
Experimental Brain Research, .
(doi:10.1007/s00221-018-5261-z).
Abstract
Coordinating bimanual movements is essential for everyday activities. Two common types of bimanual tasks are common goal, where two arms share a united goal, and dual goal, which involves independent goals for each arm. Here, we examine how the neural control mechanisms differ between these two types of bimanual tasks. Ten non-disabled individuals performed isometric force tasks of the elbow at 10% of their maximal voluntary force in both bimanual common and dual goals as well as unimanual conditions. Using transcranial magnetic stimulation, we concurrently examined the intracortical inhibitory modulation (short-interval intracortical inhibition, SICI) as well as the interlimb coordination strategies utilized between common- vs. dual-goal tasks. Results showed a reduction of SICI in both hemispheres during dual-goal compared to common-goal tasks (dominant hemisphere: P = 0.04, non-dominant hemisphere: P = 0.03) and unimanual tasks (dominant hemisphere: P = 0.001, non-dominant hemisphere: P = 0.001). For the common-goal task, a reduction of SICI was only seen in the dominant hemisphere compared to unimanual tasks (P = 0.03). Behaviorally, two interlimb coordination patterns were identified. For the common-goal task, both arms were organized into a cooperative “give and take” movement pattern. Control of the non-dominant arm affected stabilization of bimanual force (R2 = 0.74, P = 0.001). In contrast, for the dual-goal task, both arms were coupled together in a positive fashion and neither arm affected stabilization of bimanual force (R2 = 0.31, P = 0.1). The finding that intracortical inhibition and interlimb coordination patterns were different based on the goal conceptualization of bimanual tasks has implications for future research.
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Neural motor control differs between bimanual common-goal vs. bimanual dual-goal tasks
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Neural motor control differs between bimanual common-goal vs. bimanual dual-goal tasks
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Accepted/In Press date: 10 April 2018
e-pub ahead of print date: 16 April 2018
Keywords:
Bimanual coordination, Interlimb force coordination, Motor control, Short-interval intracortical inhibition (SICI), Task goal
Identifiers
Local EPrints ID: 421549
URI: http://eprints.soton.ac.uk/id/eprint/421549
ISSN: 0014-4819
PURE UUID: 4bced7ec-f49e-4145-85bc-6ebf5097f233
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Date deposited: 14 Jun 2018 16:30
Last modified: 16 Mar 2024 06:32
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Contributors
Author:
Wan wen Liao
Author:
Jill Whitall
Author:
Joseph E. Barton
Author:
Sandy Mccombe Waller
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