Task difficulty modulates young-old differences in network expression.

  title={Task difficulty modulates young-old differences in network expression.},
  author={Yaakov Stern and Brian C. Rakitin and Christian G. Habeck and Yunglin Gazes and Jason Steffener and Arjun S Kumar and Aaron Reuben},
  journal={Brain research},
The extent of task-related fMRI activation can vary as a function of task difficulty. Also the efficiency or capacity of the brain networks underlying task performance can change with aging. We asked whether the expression of a network underlying task performance would differ as a function of task demand in old and young individuals. 26 younger and 23 older healthy adults performed a delayed item recognition task that used the response signal method to parametrically manipulate the extrinsic… CONTINUE READING

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