Linked Life Data

21710218

Source:http://linkedlifedata.com/resource/pubmed/id/21710218

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2011-7-12
pubmed:abstractText
Closed-loop (CL) and open-loop (OL) types of motor control during human forward upper trunk bending are investigated. A two-joint (hip and ankle) biomechanical model of the human body is used. The analysis is performed in terms of the movements along eigenvectors of the motion equation ("eigenmovements" or "natural synergies"). Two analyzed natural synergies are called "H-synergy" (Hip) and "A-synergy" (Ankle) according to the dominant joint in each of these synergies. Parameters of CL control were estimated using a sudden support platform displacement applied during the movement execution. The CL gain in the H-synergy increased and in the A-synergy decreased during the movement as compared with the quiet standing. The analysis of the time course of OL control signal suggests that the H-synergy (responsible for the prime movement, i.e. bending per se) is controlled according to the EP theory whereas for the associated A-synergy (responsible for posture adjustment, i.e. equilibrium maintenance) muscle forces and gravity forces are balanced for any its final amplitude and therefore the EP theory is not applicable to its control.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1432-0770
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
104
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
425-38
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Closed-loop and open-loop control of posture and movement during human trunk bending.
pubmed:affiliation
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Science, 5A, Butlerov, Moscow, 117485, Russia. alexeialexandrov@inbox.ru
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't