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Rhythmic arm movement is not discrete.

Abstract：

:Rhythmic movements, such as walking, chewing or scratching, are phylogenetically old motor behaviors found in many organisms, ranging from insects to primates. In contrast, discrete movements, such as reaching, grasping or kicking, are behaviors that have reached sophistication primarily in younger species, particularly primates. Neurophysiological and computational research on arm motor control has focused almost exclusively on discrete movements, essentially assuming similar neural circuitry for rhythmic tasks. In contrast, many behavioral studies have focused on rhythmic models, subsuming discrete movement as a special case. Here, using a human functional neuroimaging experiment, we show that in addition to areas activated in rhythmic movement, discrete movement involves several higher cortical planning areas, even when both movement conditions are confined to the same single wrist joint. These results provide neuroscientific evidence that rhythmic arm movement cannot be part of a more general discrete movement system and may require separate neurophysiological and theoretical treatment.

journal_name

Nat Neurosci

journal_title

Nature neuroscience

authors

Schaal S,Sternad D,Osu R,Kawato M

doi

10.1038/nn1322

subject

Has Abstract

pub_date

2004-10-01 00:00:00

pages

1136-43

issue

10

eissn

1097-6256

issn

1546-1726

pii

nn1322

journal_volume

7

pub_type

杂志文章

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