Task-related modulation of visual cortex.

  title={Task-related modulation of visual cortex.},
  author={Alexander C Huk and David J. Heeger},
  journal={Journal of neurophysiology},
  volume={83 6},
We performed a series of experiments to quantify the effects of task performance on cortical activity in early visual areas. Functional magnetic resonance imaging (fMRI) was used to measure cortical activity in several cortical visual areas including primary visual cortex (V1) and the MT complex (MT+) as subjects performed a variety of threshold-level visual psychophysical tasks. Performing speed, direction, and contrast discrimination tasks produced strong modulations of cortical activity. For… CONTINUE READING