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- Publisher Website: 10.1037/xhp0000492
- Scopus: eid_2-s2.0-85042415633
- PMID: 29481100
- WOS: WOS:000433153100012
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Article: Volitional and automatic control of the hand when reaching to grasp objects
Title | Volitional and automatic control of the hand when reaching to grasp objects |
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Authors | |
Issue Date | 2018 |
Publisher | American Psychological Association. The Journal's web site is located at http://www.apa.org/journals/xhp.html |
Citation | Journal of Experimental Psychology: Human Perception and Performance, 2018, v. 44 n. 6, p. 953-972 How to Cite? |
Abstract | When picking up an object, we tend to grasp at contact points that allow a stable grip. Recent studies have demonstrated that appropriate grasp points can be selected during an ongoing movement in response to unexpected perturbations of the target object. In this study, we tested whether such online grip adjustments are automatic responses or can be controlled volitionally. Subjects performed virtual grasping movements toward target 2D shapes that sometimes changed shape or orientation during movement. Unlike in previous studies, the conditions and task requirements discouraged any online adjustments toward the perturbed shapes. In Experiment 1, target shapes were perturbed briefly (200 ms) during movement before reverting to the original shape, and subjects were instructed to ignore the transient perturbations. Despite subjects’ intentions, we observed online adjustments of grip orientation that were toward the expected grip axis of the briefly presented shape. In Experiment 2, we added a stop-signal to the grasping task, with target perturbation as the stop cue. We again observed unnecessary online adjustments toward the grip axis of the perturbed shape, with similar latency. Furthermore, the grip adjustments continued after the forward motion of the hand had stopped, indicating that the automatic response to the perturbed target shape co-occurred with the volitional response to the perturbation onset. Our results provide evidence that automatic control mechanisms are used to guide the fingers to appropriate grasp points and suggest that these mechanisms are distinct from those involved with volitional control. |
Persistent Identifier | http://hdl.handle.net/10722/303897 |
ISSN | 2023 Impact Factor: 2.1 2023 SCImago Journal Rankings: 1.034 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | CHEN, Z | - |
dc.contributor.author | Saunders, JA | - |
dc.date.accessioned | 2021-09-23T08:52:17Z | - |
dc.date.available | 2021-09-23T08:52:17Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Journal of Experimental Psychology: Human Perception and Performance, 2018, v. 44 n. 6, p. 953-972 | - |
dc.identifier.issn | 0096-1523 | - |
dc.identifier.uri | http://hdl.handle.net/10722/303897 | - |
dc.description.abstract | When picking up an object, we tend to grasp at contact points that allow a stable grip. Recent studies have demonstrated that appropriate grasp points can be selected during an ongoing movement in response to unexpected perturbations of the target object. In this study, we tested whether such online grip adjustments are automatic responses or can be controlled volitionally. Subjects performed virtual grasping movements toward target 2D shapes that sometimes changed shape or orientation during movement. Unlike in previous studies, the conditions and task requirements discouraged any online adjustments toward the perturbed shapes. In Experiment 1, target shapes were perturbed briefly (200 ms) during movement before reverting to the original shape, and subjects were instructed to ignore the transient perturbations. Despite subjects’ intentions, we observed online adjustments of grip orientation that were toward the expected grip axis of the briefly presented shape. In Experiment 2, we added a stop-signal to the grasping task, with target perturbation as the stop cue. We again observed unnecessary online adjustments toward the grip axis of the perturbed shape, with similar latency. Furthermore, the grip adjustments continued after the forward motion of the hand had stopped, indicating that the automatic response to the perturbed target shape co-occurred with the volitional response to the perturbation onset. Our results provide evidence that automatic control mechanisms are used to guide the fingers to appropriate grasp points and suggest that these mechanisms are distinct from those involved with volitional control. | - |
dc.language | eng | - |
dc.publisher | American Psychological Association. The Journal's web site is located at http://www.apa.org/journals/xhp.html | - |
dc.relation.ispartof | Journal of Experimental Psychology: Human Perception and Performance | - |
dc.rights | ©American Psychological Association, [Year]. This paper is not the copy of record and may not exactly replicate the authoritative document published in the APA journal. Please do not copy or cite without author's permission. The final article is available, upon publication, at: [ARTICLE DOI] | - |
dc.title | Volitional and automatic control of the hand when reaching to grasp objects | - |
dc.type | Article | - |
dc.identifier.email | Saunders, JA: jsaun@hku.hk | - |
dc.identifier.authority | Saunders, JA=rp00638 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1037/xhp0000492 | - |
dc.identifier.pmid | 29481100 | - |
dc.identifier.scopus | eid_2-s2.0-85042415633 | - |
dc.identifier.hkuros | 324946 | - |
dc.identifier.volume | 44 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | 953 | - |
dc.identifier.epage | 972 | - |
dc.identifier.isi | WOS:000433153100012 | - |
dc.publisher.place | United States | - |