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Rapid Crossed Responses in an Intrinsic Hand Muscle During Perturbed Bimanual Movements.

Abstract

Mechanical perturbations in one upper limb often elicit corrective responses in both the perturbed as well as its contralateral and unperturbed counterpart. These crossed corrective responses have been shown to be sensitive to the bimanual requirements of the perturbation but crossed responses (CRs) in hand muscles are far less well studied. Here, we investigate corrective CRs in an intrinsic hand muscle, the First Dorsal Interosseous (1DI), to clockwise and anticlockwise mechanical perturbations to the contralateral index finger while participants performed a bimanual finger abduction task. We found that the CRs in the unperturbed 1DI were sensitive to the direction of the perturbation of the contralateral index finger. However, the size of the CRs was not sensitive to the amplitude of the contralateral perturbation nor its context within the bimanual task. The onset latency of the CRs was too fast to be purely transcortical (<70 ms) in 12/12 participants. This confirms that during isolated bimanual finger movements, sensory feedback from one hand can influence the other, but the pathways mediating the earliest components of this interaction are likely to involve subcortical systems such as the brainstem or spinal cord, which may afford less flexibility to the task demands.

Authors+Show Affiliations

Queen's University of Belfast, United Kingdom.Basic Neuroscience, University of Geneva, Switzerland.Institute of Neuroscience, Newcastle University, United Kingdom.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31851557

Citation

Khong, Katie Ying Wei, et al. "Rapid Crossed Responses in an Intrinsic Hand Muscle During Perturbed Bimanual Movements." Journal of Neurophysiology, 2019.
Khong KYW, Galán F, Soteropoulos DS. Rapid Crossed Responses in an Intrinsic Hand Muscle During Perturbed Bimanual Movements. J Neurophysiol. 2019.
Khong, K. Y. W., Galán, F., & Soteropoulos, D. S. (2019). Rapid Crossed Responses in an Intrinsic Hand Muscle During Perturbed Bimanual Movements. Journal of Neurophysiology, doi:10.1152/jn.00282.2019.
Khong KYW, Galán F, Soteropoulos DS. Rapid Crossed Responses in an Intrinsic Hand Muscle During Perturbed Bimanual Movements. J Neurophysiol. 2019 Dec 18; PubMed PMID: 31851557.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Rapid Crossed Responses in an Intrinsic Hand Muscle During Perturbed Bimanual Movements. AU - Khong,Katie Ying Wei, AU - Galán,Ferran, AU - Soteropoulos,Demetris S, Y1 - 2019/12/18/ PY - 2019/12/19/entrez PY - 2019/12/19/pubmed PY - 2019/12/19/medline KW - Hand KW - Muscle KW - bimanual KW - crossed KW - perturbation JF - Journal of neurophysiology JO - J. Neurophysiol. N2 - Mechanical perturbations in one upper limb often elicit corrective responses in both the perturbed as well as its contralateral and unperturbed counterpart. These crossed corrective responses have been shown to be sensitive to the bimanual requirements of the perturbation but crossed responses (CRs) in hand muscles are far less well studied. Here, we investigate corrective CRs in an intrinsic hand muscle, the First Dorsal Interosseous (1DI), to clockwise and anticlockwise mechanical perturbations to the contralateral index finger while participants performed a bimanual finger abduction task. We found that the CRs in the unperturbed 1DI were sensitive to the direction of the perturbation of the contralateral index finger. However, the size of the CRs was not sensitive to the amplitude of the contralateral perturbation nor its context within the bimanual task. The onset latency of the CRs was too fast to be purely transcortical (<70 ms) in 12/12 participants. This confirms that during isolated bimanual finger movements, sensory feedback from one hand can influence the other, but the pathways mediating the earliest components of this interaction are likely to involve subcortical systems such as the brainstem or spinal cord, which may afford less flexibility to the task demands. SN - 1522-1598 UR - https://www.unboundmedicine.com/medline/citation/31851557/Rapid_Crossed_Responses_in_an_Intrinsic_Hand_Muscle_During_Perturbed_Bimanual_Movements L2 - https://www.physiology.org/doi/10.1152/jn.00282.2019?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=www.ncbi.nlm.nih.gov DB - PRIME DP - Unbound Medicine ER -