Sub-millimeter fMRI reveals multiple topographical digit representations that form action maps in human motor cortex.

ABSTRACT: The human brain coordinates a wide variety of motor activities. On a large scale, the cortical motor system is topographically organized such that neighboring body parts are represented by neighboring brain areas. This homunculus-like somatotopic organization along the central sulcus has been observed using neuroimaging for large body parts such as the face, hands and feet. However, on a finer scale, invasive electrical stimulation studies show deviations from this somatotopic organization that suggest an organizing principle based on motor actions rather than body part moved. It has not been clear how the action-map organization principle of the motor cortex in the mesoscopic (sub-millimeter) regime integrates into a body map organization principle on a macroscopic scale (cm). Here we dev

SUBMITTER: Huber L 

PROVIDER: S-EPMC11829252 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature