• Language
• Attention to phonological relations (12457755)
• Semantic processing (more elaborate and complete) (16575838)
• Verbal creativity (15172131)
• Writing of single letters(16506011)
• Memory
• Retrieval of unpleasant experiences (18502045)
• Working memory (emotional/auditory related) (11352614)
• Conscious recollection of previously experienced events (8134341)
• Motor
• Executive control of behavior (16859418)
• Response to aversive stimuli (16162829)
• Visually guided grasping (15820646)
• Gesture imitation (15769494, 15305134)
• Visuomotor transformation/motor planning (15062860)
• Repetitive passive movements (10724112)
• Intention/sensory feedback conflict detection (10094258)
• Somatosensory
• Somatosensory spatial discrimination (18234508)
• Integration of tactile and proprioceptive information (17451973)
• Visual 
• Response to visual motion (7807222)
• Other
• Deductive reasoning (17904384, 11958963)
• Social perception and empathy (16337816)
• Emotions vs. self-reflections in decision-making (Right) (15746230)
• Music performance processing (15062860)
• Goal-intensive processing (11880658)
• Same-different discrimination (Right) (11371315)
• Calculation (integer computation) (Left) (11371315)
• Motion after-effect (10725183)
• Performing creative tasks (Left) (15172131)

The supramarginal gyrus of the left hemisphere appears to support some complex linguistic processes, such as semantic processing and verbal creativity. Its role in spatial knowledge, and particularly, controlling movements guided by visuospatial information seems evident. Its role in calculation is probably related with its adjacency to the angular gyrus and intraparietal sulcus. The left supramarginal gyrus seems to be involved in some complex motor activity, such as motor planning; this function is continued in the superior parietal lobe. BA40 also participates in an executive function network, involved in tasks such as deductive reasoning and performing creative tasks