Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1404
pubmed:dateCreated
2001-2-1
pubmed:abstractText
In this paper we discuss a new perspective on how the central nervous system (CNS) represents and solves some of the most fundamental computational problems of motor control. In particular, we consider the task of transforming a planned limb movement into an adequate set of motor commands. To carry out this task the CNS must solve a complex inverse dynamic problem. This problem involves the transformation from a desired motion to the forces that are needed to drive the limb. The inverse dynamic problem is a hard computational challenge because of the need to coordinate multiple limb segments and because of the continuous changes in the mechanical properties of the limbs and of the environment with which they come in contact. A number of studies of motor learning have provided support for the idea that the CNS creates, updates and exploits internal representations of limb dynamics in order to deal with the complexity of inverse dynamics. Here we discuss how such internal representations are likely to be built by combining the modular primitives in the spinal cord as well as other building blocks found in higher brain structures. Experimental studies on spinalized frogs and rats have led to the conclusion that the premotor circuits within the spinal cord are organized into a set of discrete modules. Each module, when activated, induces a specific force field and the simultaneous activation of multiple modules leads to the vectorial combination of the corresponding fields. We regard these force fields as computational primitives that are used by the CNS for generating a rich grammar of motor behaviours.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-10036291, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-10591912, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-10627617, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-107279, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-1472573, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-16993027, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-17776454, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-1857964, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-2132860, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-2286236, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-3297722, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-3411361, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-3689835, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-4045550, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-4052499, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-4247360, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-4260739, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-5784296, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-6502202, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-656477, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-7093370, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-7262217, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-7965013, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8052615, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-808592, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8182467, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8274536, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8294975, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8423483, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8426224, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8547789, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8717039, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8751070, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8813283, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8824344, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8836239, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-8930267, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-9006993, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-9151414, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-9242612, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-9671681, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-9698575, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-9795191, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-9819246, http://linkedlifedata.com/resource/pubmed/commentcorrection/11205339-9949827
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0962-8436
pubmed:author
pubmed:issnType
Print
pubmed:day
29
pubmed:volume
355
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1755-69
pubmed:dateRevised
2010-9-14
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Motor learning through the combination of primitives.
pubmed:affiliation
Department of Physiology, Northwestern University Medical School, Chicago, IL, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.