This prospective study will investigate the presence of cognitive deficits after chemotherapy in cancer patients by assessing changes in three fcMRI-defined neural networks involved in cognition. The three networks include (1) Dorsal Frontal Attention network (2) "Default" network and (3) Cognition "Core" control network. Sixteen cancer patients scheduled for chemotherapy will undergo fcMRI of the brain and neurocognitive testing within two weeks before and after chemotherapy. Comparisons between time-points will establish the effect of chemotherapy on cognition.