Figure 5.

Observed average LI shift in patients with tumors ipsilateral or contralateral relative to the hemisphere of initial language dominance. Positive LI shift values indicate movement away from the affected hemisphere. Patients with tumors positioned ipsilaterally to language dominance present a significantly greater shift in LI away from the tumor location between scans than those with contralateral pathologies, on average. Patients with tumors ipsilateral to language function experience greater LI index shifts on average away from affected hemisphere, and therefore away from language dominant hemisphere. Most patients with tumors contralateral to language dominance experience no shift, while some experience a shift toward the affected hemisphere, but away from language. Error bars drawn using ±1 SE