DefiningSma - Methods
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Defining SMA

How to define SMA on anatomy. Think this is wrong? Let MatthewBrett know.

This text and pictures stolen with gratitude from Sam Burnand and Rich Armstrong.

The pre-SMA and SMA proper were defined with the following boundaries (Picard and Strick, 2001).



  • Inferior border: Cingulate sulcus
  • Superior border: Medial fold of cortex

All following vertical borders are perpendicular to the AC-PC line; the line joining anterior and posterior commissures.

  • Anterior border: anterior border of the genu of the corpus callosum
  • Posterior border: posterior commissure

Separation into pre-SMA and SMA proper (pre-SMA is anterior): anterior commissure

None: DefiningSma (last edited 2013-03-08 10:28:25 by localhost)