| |
Abstract:
fMRI was used to identify the neural regions involved in the
processing of visual feedback in motor learning. Subjects moved a
joystick to reproduce a visually presented target waveform with no
concurrent visual feedback. They reproduced each target twice, both
before and after a feedback period. In the feedback period,
subjects either received feedback (their first movement
superimposed over the target) or viewed the target again with no
movement information. Results showed that many of the regions
involved in interpreting feedback, or planning movements based on
feedback, (feedback period with feedback, versus feedback period
with no feedback) were also involved in the initial production of
the movement. These regions included right occipital gyrus (BA 19),
left caudate, right premotor, and right inferior parietal cortex.
Areas involved in acting on feedback, (second movement post
feedback versus post no feedback) included bilateral striatum,
bilateral prefrontal cortex (BA 9 & 46), left premotor cortex,
left posterior parietal cortex and right inferior parietal cortex.
These results implicate a frontal-striatal loop in modifying
movement plans and monitoring movements in response to
feedback.
|
