english only
EPFL > STI > IMT > LASA > Publications > BibTex

@comment{ generated by  }

abstract = {Human motion studies have focused primarily on modeling
straight point-to-point reaching movements. However, many
goal-directed reaching movements, such as movements
directed towards oneself, are not straight but rather
follow highly curved trajectories. These movements are
particularly interesting to study since they are
essential in our everyday life, appear early in
development and are routinely used to assess movement
deficits following brain lesions. We argue that curved
and straight-line reaching movements are generated by a
unique neural controller and that the observed curvature
of the movement is the result of an active control
strategy that follows the geometry of oneís body, for
instance to avoid trajectories that would hit the body or
yield postures close to the joint limits. We present a
mathematical model that accounts for such an active
control strategy and show that the model reproduces with
high accuracy the kinematic features of human data during
unconstrained reaching movements directed toward the
head. The model consists of a nonlinear dynamical system
with a single stable attractor at the target.
Embodiment-related task constraints are expressed as a
force field that acts on the dynamical system. Finally,
we discuss the biological plausibility and neural
correlates of the modelís parameters and suggest that
embodiment should be considered as a main cause for
movement trajectory curvature.},
affiliation = {EPFL},
author = {Petreska, Biljana and Billard, Aude},
details = {http://infoscience.epfl.ch/record/129378},
documenturl = {http://infoscience.epfl.ch/getfile.py?recid=129378&mode=best},
doi = { },
extra-id = {000266160700001},
journal = {Biological {C}ybernetics},
keywords = {Motor control - Neural control of movement - Dynamical;
systems - Computational model - Goal-directed reaching;
number = {5},
oai-id = {oai:infoscience.epfl.ch:129378},
oai-set = {article; fulltext-public; fulltext},
pages = {331--350},
review = {REVIEWED},
status = {PUBLISHED},
title = {Movement {C}urvature {P}lanning through {F}orce {F}ield
{I}nternal {M}odels},
unit = {LASA},
url = {http://www.springerlink.com/content/hx74363218j51266/?p=f2fd4131fb194e959474ace1c1b39dfe&pi=0},
volume = {100},
year = 2009

Downloadable files: 0) { $tempFile = $row['pdfFile']; $temp = "pdf"; echo "[$temp] "; } // ps.Z if (strlen($row['psZFile'])>0) { $tempFile = $row['psZFile']; $temp = "ps.Z"; echo "[$temp] "; } // ps.gz if (strlen($row['psgzFile'])>0) { $tempFile = $row['psgzFile']; $temp = "ps.gz"; echo "[$temp] "; } ?>

Last update: 25/08/06