Which part of the brain contains the supplementary motor area (SMA)?

The supplementary motor area (SMA) is located in the frontal lobe of the brain. It plays a crucial role in the planning and coordination of movements, particularly when these movements involve sequences or complex actions. The frontal lobe is known for its involvement in voluntary motor control, higher cognitive functions, and decision-making, making it an appropriate location for the SMA.

In contrast, the other areas of the brain—such as the parietal lobe, which is primarily involved in sensory processing and spatial awareness; the temporal lobe, which is associated with auditory processing and memory; and the occipital lobe, which is primarily dedicated to visual processing—do not host the supplementary motor area. The functions of these lobes support the understanding of why the SMA is specifically situated within the frontal lobe, emphasizing the region's predominant role in motor function and planning.