To characterize the neural correlates of color and motion perception in humans with the newly-developed event-related functional magnetic resonance imaging (fMRI) . Materials and Methods: Seven subjects were scanned with a 1. 5 T MRI system. Color and motion stimuli were randomly presented. Data were pre-processed and statistically analyzed, and brain activation maps for each type of stimuli were generatted and local hemodynamic response in each activation area was plotted. Results: Color and motion stimuli resulted in activation in bilateral V4 and MT+ , respectively. However , V4 also showed a weak but statistically significant response to motion stimulus and MT+ to color stimulus. Conclusion: V4 is an important device for color perception, but also engaged in motion perception. Similarly, MT+ plays a critical role in motion perception, but also related to color perception. Event related design procedure appears to be more sensitive than block design method.
修改评论