FMRI, Kinematic, and ERP Studies of Memory-Guided Hand Actions & Divided Attention

Anthony Singhal
University of Western Ontario

Grasping an object that is no longer in view, such as a door handle in darkness, requires the motor system to access stored information about the size, shape, position and orientation of the intended object in order to guide and preshape the hand prior to contact. This is a situation of memory-guided grasping, which is distinguishable from the immediate grasping of a visible target object, where accurate object property information is provided by the visual system on a moment-to-moment basis. In this talk, I will present data from two studies investigating the nature of the relationship between the perceptual-memory system and the action system during memory-guided reaching and grasping tasks.

My second line of research has been to understand how we are capable of organizing the vast amount of relevant and irrelevant information that we are exposed to during the completion of everyday tasks. I will also present data from event-related potential (ERP) experiments designed to investigate the nature of attentional bottlenecks in information processing when individuals are multitasking.