Anticipatory Modulation of Precision Grip Force With Variations in Limb Velocity of a Curvilinear Movement.
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| Title: | Anticipatory Modulation of Precision Grip Force With Variations in Limb Velocity of a Curvilinear Movement. |
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| Authors: | Weeks, Douglas L., Sherwood, David E., Noteboom, J. Timothy |
| Source: | Journal of Motor Behavior. Mar2002, Vol. 34 Issue 1, p59. 8p. |
| Subjects: | Extremities (Anatomy), Proprioceptors |
| Abstract: | ABSTRACT. The authors examined the relationship between peak velocity of a discrete horizontal elbow flexion movement in which the hand path was curvilinear and premovement modulation of precision grip force. The velocity of the movements of 7 participants was varied from maximal velocity to a velocity that required several seconds to reach a target. An object instrumented with force transducers for the forefinger and thumb measured precision grip force. There was a positively accelerating quadratic relationship between grip force change before movement and peak veloc-ity of the ensuing limb movement. On some low-velocity trials, premovement grip force modulation reflected a net decrease. In contrast, high-velocity trials were preceded by net increases in grip force. Using cluster analysis, the authors classified grip forces in low-velocity movements as an empirically distinct set of entities from grip forces in high-velocity movements. The cluster of high-value grip forces suggested an anticipatory strategy that allowed participants a large safety margin in grip force to avoid object slip on movement initiation. The cluster of low-value grip forces at movement initiation suggested a second anticipatory strategy in which participants changed grip force very little, perhaps to increase the ability of proprioceptors in the hand to sense force changes. Those findings suggest that modulation of grip force before initiation of movements in which the hand path is curvilinear may be governed by two distinct velocity-dependent anticipatory strategies. Key words: anticipatory response, feedforward, hand, motor control, prehension. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Motor Behavior is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 6370278 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Anticipatory Modulation of Precision Grip Force With Variations in Limb Velocity of a Curvilinear Movement. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Weeks%2C+Douglas+L%2E%22">Weeks, Douglas L.</searchLink><br /><searchLink fieldCode="AR" term="%22Sherwood%2C+David+E%2E%22">Sherwood, David E.</searchLink><br /><searchLink fieldCode="AR" term="%22Noteboom%2C+J%2E+Timothy%22">Noteboom, J. Timothy</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Motor+Behavior%22">Journal of Motor Behavior</searchLink>. Mar2002, Vol. 34 Issue 1, p59. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Extremities+%28Anatomy%29%22">Extremities (Anatomy)</searchLink><br /><searchLink fieldCode="DE" term="%22Proprioceptors%22">Proprioceptors</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: ABSTRACT. The authors examined the relationship between peak velocity of a discrete horizontal elbow flexion movement in which the hand path was curvilinear and premovement modulation of precision grip force. The velocity of the movements of 7 participants was varied from maximal velocity to a velocity that required several seconds to reach a target. An object instrumented with force transducers for the forefinger and thumb measured precision grip force. There was a positively accelerating quadratic relationship between grip force change before movement and peak veloc-ity of the ensuing limb movement. On some low-velocity trials, premovement grip force modulation reflected a net decrease. In contrast, high-velocity trials were preceded by net increases in grip force. Using cluster analysis, the authors classified grip forces in low-velocity movements as an empirically distinct set of entities from grip forces in high-velocity movements. The cluster of high-value grip forces suggested an anticipatory strategy that allowed participants a large safety margin in grip force to avoid object slip on movement initiation. The cluster of low-value grip forces at movement initiation suggested a second anticipatory strategy in which participants changed grip force very little, perhaps to increase the ability of proprioceptors in the hand to sense force changes. Those findings suggest that modulation of grip force before initiation of movements in which the hand path is curvilinear may be governed by two distinct velocity-dependent anticipatory strategies. Key words: anticipatory response, feedforward, hand, motor control, prehension. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Motor Behavior is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/00222890209601931 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 59 Subjects: – SubjectFull: Extremities (Anatomy) Type: general – SubjectFull: Proprioceptors Type: general Titles: – TitleFull: Anticipatory Modulation of Precision Grip Force With Variations in Limb Velocity of a Curvilinear Movement. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Weeks, Douglas L. – PersonEntity: Name: NameFull: Sherwood, David E. – PersonEntity: Name: NameFull: Noteboom, J. Timothy IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2002 Type: published Y: 2002 Identifiers: – Type: issn-print Value: 00222895 Numbering: – Type: volume Value: 34 – Type: issue Value: 1 Titles: – TitleFull: Journal of Motor Behavior Type: main |
| ResultId | 1 |
