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Subjects made a series of finger opposition movements initiated in a self\u2010paced manner every 4 to 6 seconds, and separately, made continuous finger opposition movements at a frequency of 2 Hz paced by a metronome. The primary motor cortex, lateral area 6, cerebellum on both sides, and caudal cingulate motor area, and the putamen and thalamus on the contralateral side were more active during the metronome\u2010paced movements. The increase in rCBF in these areas are likely the result of the larger number of movements per minute made with the externally triggered task. The anterior supplementary motor area and rostal cingulate motor area in the midline, prefrontal cortices bilaterally, and lobus parietalis inferior on the ipsilateral side were more active during the self\u2010paced movements. Increase in rCBF in those areas, which include medial premotor structures, may be related to the increased time devoted to planning the movement in this condition.<\/jats:p>","DOI":"10.1111\/jon199773145","type":"journal-article","created":{"date-parts":[[2016,2,8]],"date-time":"2016-02-08T10:30:16Z","timestamp":1454927416000},"page":"145-151","source":"Crossref","is-referenced-by-count":60,"title":["Self\u2010Paced Versus Metronome\u2010Paced 7 Finger 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