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Instituto Nacional de Neurología y Neurocirugía

2008, Number 2

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Arch Neurocien 2008; 13 (2)

Supplementary motor area

Marín ME, Bramasco AA, Alonso VMA

Language: Spanish
References: 38
Page: 118-124
PDF size: 148.88 Kb.


ABSTRACT

Just in front of the motor area of the human cerebral cortex there is a supplementary representation of movements. The “supplementary motor area” (SMA) is the term introduced by Penfield and Welch to distinguish this area on the mesial superior frontal gyrus that constitutes a complex anatomical and functional system for initiation and control of motor function and speech expression, from the primary motor area (PMA). Its exact role has not been defined, however, thanks to the development of experimental and clinical trials using new imaging and neurophysiological techniques, including positron emission tomography and functional magnetic resonance imaging, new roles of the SMA have been defined. The importance of knowing the exact anatomy and function of the SMA derives from the beneficial effects obtained with epilepsy surgery in patients suffering epilepsy of this cortical region.


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