Social and self-referential cognitive processes have been linked with cortical midline brain regions such as PCC and the medial prefrontal cortex (MPFC), reflecting the high functional connectivities within the default mode network (DMN). In healthy individuals with TD, the functional connectivities of DMN are consistently deactivated when the individual is engaged in a cognitively demanding, goal-oriented task. On the other hand, brain regions of the DMN are often engaged during social cognition processing tasks such as self-reference and the ‘theory of mind’. This marked overlap between brain regions of the DMN and regions of the ‘social brain’ suggests that the brain regions of the DMN are strongly associated with the social cognition process