Superior parietal cortex and the attention to delayed intention: An rTMS study.

Area of Science:

• Cognitive Neuroscience
• Neuropsychology

Background:

• Prospective memory (PM) is crucial for daily functioning, involving remembering intentions at future cues.
• The precise neural mechanisms, particularly the role of the superior parietal cortex, remain incompletely understood.

Purpose of the Study:

• To determine the causal role of the superior parietal cortex in prospective memory.
• To elucidate the functional contribution of this brain region to PM performance.

Main Methods:

• Repetitive transcranial magnetic stimulation (rTMS) was applied to the left and right superior parietal cortex.
• Participants completed two PM tasks varying in attentional demands: a 'Monitoring-load' task and a 'Retrospective-load' task.

Main Results:

• rTMS of the left superior parietal cortex significantly improved PM performance in both tasks.
• Stimulation of both left and right parietal cortex slowed ongoing task responses, particularly in the 'Retrospective-load' condition.

Conclusions:

• The superior parietal cortex is causally involved in prospective memory.
• This region plays a critical role in dynamically biasing attentional resources between external stimuli and internal memory intentions.