Transcript Motor control and learning in altered dynamic environments

Motor control and learning in
altered dynamic environments
‫سارا كنگرلو‬
1385 ‫ديماه‬
‫سمينار در س كنترل سيستمهاي عصبي عضالني‬
: ‫فهرست مطالب‬
Goals
Introduction
Coriolis forces
Inertial and mechanical perturbations of
limb movements
Coriolis forces and self-calibration
Spatial goals and adaptation to jaw and limb
perturbations
Internal models of motor control
Conclusions
Progress has been made in understanding:
1 adaptive responses to velocity-dependent
perturbations
2 the transfer of adaptation to mechanical
perturbations
3 the parcellation and separate representation
Introduction
mechanisms of self-calibration of the body
motor learning of object properties
‫‪Coriolis forces‬‬
‫)‪FCor = -2m(w×v‬‬
‫‪ :w‬سرعت محيط در حال چرخش‬
‫‪ : V‬سرعت بازو نسبت به محيط‬
Inertial and mechanical
perturbations of
limb movements
Adaptation in response to dynamic perturbations
of limb movements
Coriolis forces and disrupt
KINARM
manipulandum
Adaptations to Coriolis forces and robotic
dynamic force fields
movement accuracy during Coriolis
force occurs much more rapidly than it
does during robotic perturbations
De-adaptation
Re-adaptation
Coriolis forces and self-calibration
In everyday behavior, very large Coriolis forces
are generated on the arm during simultaneous
turning and reaching for an object .
the continuous, normal process of sensory–motor
self-calibration
Spatial goals and adaptation to jaw
and limb
perturbations
Pointing movements
spatial goal dependency
Particular speech
sounds
Consolidation of motor learning
The use of robotic manipulanda to perturb
movements has generated considerable
interest in what is being learned and how it
is being learned .
Internal models of motor control
Adapting to multiforce perturbations
An important unanswered question is
whether adaptation to a robotic device will
influence self-calibration of unfettered
movements or will be specific to contexts
including contact.
Neurophysiological studies of motor
control
♦ separate populations of neurons encode the
dynamic and the postural components of a
movement .
♦ neurons in area M1 participate in a variety
of motor tasks that involve different constraints .
‫جمعبندي ‪:‬‬
‫اهميت بررسي تفاوت بين خودكاليبراسيون فعال و استفاده‬
‫از سيستم تطبيقي‪ ،‬در فهم تفاوت بين تطبيق‬
‫اغتشاشاتمكانيكي و جبري نمود پيدا مي كند‪.‬‬