Modulation of somatosensory perception by motor intention

作者：Parkinson Amy; Plukaard Sarah; Pears Sally L; Newport Roger; Dijkerman Chris; Jackson Stephen R^*

来源：Cognitive Neuroscience, 2011, 2(1): 47-56.

DOI：10.1080/17588928.2010.525627

• fMRI
• Functional connectivity
• Motor prediction
• Somatosensory function
• Motor intention

The intention to execute a movement can modulate our perception of sensory events; however, theoretical accounts of these effects, and also empirical data, are often contradictory. We investigated how perception of a somatosensory stimulus differed according to whether it was delivered to a limb being prepared for movement or to a nonmoving limb. Our results demonstrate that individuals perceive a somatosensory stimulus delivered to the "moving" limb as occurring significantly later than when an identical stimulus is delivered to a "nonmoving" limb. Furthermore, human brain imaging (fMRI) analyses demonstrate that this modulation is accompanied by a significant decrease in BOLD signal in the right parietal operculum (SII) for stimuli delivered to the moving limb. These results indicate that during movement preparation a network of premotor brain areas may facilitate movement execution by attenuating the processing of behaviorally irrelevant signals within higher-order secondary somatosensory (SII) areas.

• 出版日期2011-3