Linked Life Data

15331157

Source:http://linkedlifedata.com/resource/pubmed/id/15331157

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2004-8-27
pubmed:abstractText
The experiment investigated the influence of segmental coupling on the ability to produce random-like movements in individual limb segments. Adult participants were instructed to move randomly (2 min trials) in the sagittal plane their index finger, hand, and lower arm as "frozen" effector units or where the individual links within the upper limb complex were free to move independently. The findings showed that the distal finger movements were more random-like when the proximal joints were also free to vary, but the reverse directional segmental effects were not present. Analysis of the movement frequency structure of the coordination between limb segments showed that patterns of modal frequencies were preserved even though the participants were trying to produce with equal probability a wide range of frequencies. These findings provide further evidence that: (1) the boundary conditions on the degrees of freedom of the neural output of an effector are relatively restrictive; (2) inter-limb reactive forces can enhance the limits on the dynamical degrees of freedom; and (3) the intrinsic dynamics influence movement output even when the task goal is a random output.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0304-3940
pubmed:author
pubmed:issnType
Print
pubmed:day
2
pubmed:volume
367
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
218-23
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Intra-limb segmental influences on random-like movements in humans.
pubmed:affiliation
Department of Kinesiology, College of Health and Human Development, The Pennsylvania State University, 201 Henderson Building, University Park, PA 16802, USA.
pubmed:publicationType
Journal Article, Comparative Study