Fig 4.

Laterality index curves of patients with tumor without prior surgery performing the following: A, the verb-generation task. Some patients show bilateral language lateralization in the Broca area at clinically insignificant P values, but all the patients lateralize language to the left hemisphere in the Broca area at clinically significant P values (P < .05). B, the letter task. Six patients show bilateral language representation in the Broca area at less significant P values. Patient 9 lateralizes language to the right. Patient 3 lateralizes to the left at less significant P values and to the right at more stringent P values, C, the category task. Two patients have LI curves that lateralize to the left, and 2 patients lateralize language to the right in the Broca area. Both patients who show right-hemispheric dominance for language (patients 5 and 6) have tumors in the right hemisphere.