Posture control during a dual-task involves changing the distribution of attention resources between the cognitive and motor tasks and involves the frontal cortex working memory (WM). The present study aimed to better understand the impact of frontal lobe activity and WM capacity in postural control during a dual-task. High and low WM-span groups were compared using their reading span test scores. High and low WM capacity were compared based on cognitive and balance performance and hemoglobin oxygenation (oxyHb) levels during standing during single (S-S), standing during dual (S-D), one leg standing during single (O-S), and one leg standing during dual (O-D) tasks. For sway pass length, significant difference in only the O-D task was observed between both groups. oxyHb levels were markedly increased in the right dorsolateral prefrontal cortex and supplementary motor area in the high-span group during a dual-task. Therefore, WM capacity influenced the allocation of attentional resources and motor performance.

Self-agency is the recognition of one's own movement and plays a vital role in purposeful, voluntary movement. Self-agency can occur in individuals who view their own finger movements as they are projected onto a screen and aligned with their actual hand position. Self-agency can also occur when tools are assimilated into the body schema. Here, we examined whether participants perceived self-agency when they viewed a video of a tool that they manipulated and whether the perception of self-agency correlated with simultaneous changes in oxyhemoglobin in the parietal or prefrontal cortical areas. All participants reported the perception of self-agency, which was correlated with oxyhemoglobin increases in the right inferior prefrontal area. We conclude that self-agency also relates to hand-held tools displayed by video.

Self-agency is the recognition of one's own movement and plays a vital role in purposeful, voluntary movement. A sense of self-agency can be elicited in individuals who view their own simple finger movements as they are projected onto a screen and aligned with their actual hand position. Here, we examined whether individuals perceived self-agency when they viewed a video of a hand grasping a wooden cylinder and whether the perception of self-agency correlated with simultaneous changes in oxy-hemoglobin in the parietal or the prefrontal cortical areas. All participants reported the perception of self-agency, which was correlated with oxy-hemoglobin increases in the right prefrontal area. We conclude that self-agency also relates to hand-held objects displayed on video.