Abstract：
:Prior research has concluded that the correlations of isometric finger forces represent the extent to which the fingers are controlled as a single unit. If this is the case, finger force correlations should be consistent with estimates of the controlled (dynamical) degrees of freedom in finger forces. The present study examined the finger force correlations and the dynamical degrees of freedom in four isometric force tasks. The tasks were to produce a preferred level of force with the (a) Index, (b) Ring, (c) Both fingers and also to (d) Rest the fingers on the load cells. Dynamical degrees of freedom in finger forces were lowest in the Both finger force task and progressively higher in the Ring, Index and Resting finger force tasks. The finger force correlations were highest in the Resting and lowest in the Index and Ring finger tasks. The results for the dynamical degrees of freedom in finger forces were consistent with a reduction in degrees of freedom in response to the degrees of freedom problem and the task constraints. The results for the finger force correlations were inconsistent with a reduction in the dynamical degrees of freedom. These findings indicate that finger force correlations do not necessarily reflect the coupling of finger forces. The findings also highlight the value of time-domain analyses to reveal the organization of control in isometric finger forces.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
James EGdoi
10.1007/s00221-012-3280-8subject
Has Abstractpub_date
2012-12-01 00:00:00pages
533-9issue
4eissn
0014-4819issn
1432-1106journal_volume
223pub_type
杂志文章abstract：:Dorsomedial frontal cortex (DMFC) was studied in monkeys trained to make visually guided eye or arm movements. Portions of DMFC are involved in the execution of learned, goal-directed behaviors. Many neurons discharge with both eye and hand movements as well as when motor responses are withheld, provided these behavio...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00247300
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pub_type： 杂志文章,meta分析
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journal_title：Experimental brain research
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pub_type： 杂志文章
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更新日期：1992-01-01 00:00:00
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pub_type： 杂志文章
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pub_type： 杂志文章
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更新日期：1978-11-15 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：1990-01-01 00:00:00
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更新日期：1998-05-01 00:00:00
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journal_title：Experimental brain research
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