Figure 3From: Surgery of highly eloquent gliomas primarily assessed as non-resectable: risks and benefits in a cohort study Influence of IOM on the extent of resection. When surgery was influenced by IOM due to MEP amplitude decline of more than 50% baseline, gross total resection (GTR) was only achieved in 50% of cases, whereas GTR was achieved in 89% of cases in which IOM showed no impact on surgery due to stable amplitudes (p0.0186).Back to article page