1979
DOI: 10.1126/science.493986
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Activation of the Supplementary Motor Area During Voluntary Movement in Man Suggests It Works as a Supramotor Area

Abstract: Measurements of cerebral blood flow in man revealed that complex voluntary movements are associated with a blood flow increase in the supplementary motor area of the brain. This increase is additional to and similar in magnitude to the Rolandic sensorimotor area activation that occurs during all kinds of movement. When subjects counted silently there was no activation of any focal cortical area in the brain; when they counted aloud there was a marked increase in activity in the supplementary motor area. These … Show more

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Cited by 326 publications
(93 citation statements)
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“…Finally, there is the question of whether an activity is self-paced or whether an external pacing source is provided. There is considerable agreement in the literature that the SMA is involved when sequences are voluntary/self-initiated [6,21,26,32,41]. The self-initiation role can also be related to the`intentionality' aspect of motor function that is guided by the SMA, a role anticipated by Goldberg [17].…”
Section: Discussionmentioning
confidence: 99%
“…Finally, there is the question of whether an activity is self-paced or whether an external pacing source is provided. There is considerable agreement in the literature that the SMA is involved when sequences are voluntary/self-initiated [6,21,26,32,41]. The self-initiation role can also be related to the`intentionality' aspect of motor function that is guided by the SMA, a role anticipated by Goldberg [17].…”
Section: Discussionmentioning
confidence: 99%
“…For example, when cycling there is no change in global blood flow to the brain (Madsen et al, 1993). However, voluntary movements, such as hand movements, do evoke increased local blood flow to cortical areas that receive sensory inputs as well as motor areas involved in execution (Raichle et al, 1976;Orgogozo and Larsen, 1979). This suggests that global blood flow to the brain is relatively constant, despite changes in regional blood flow.…”
Section: Animal Energy Budgetsmentioning
confidence: 93%
“…Numerous cross-references between electrophysiological and regional cerebral blood flow (rCBF) studies of movement preparation have emphasized mutual sup port for an important role of the SMA in higher levels of movement organization (e.g. Orgogozo and Larsen, 1979;Lang et al, 1989;Jenkins et al, 1992; SMA source at all (Botzel et al, 1993;Bocker et al, 1994), or an SMA source that did not contribute to the 4 premovement negativity of the readiness potential (Toro etaU 1993), There are several possible explanations for the unexpected absence of premovement SMA activity in the proposed models. One is that the simple finger movements used to elicit the readiness potential engaged but little SMA activity.…”
mentioning
confidence: 99%