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Effect of 5 weeks testosterone treatment on male and female laryngeal tension and fiber recruitment at PM0. Testosterone treated groups can be compared with PM6 male values (column at far right) and untreated frogs of the same age and sex. Testosterone treatment fully masculinizes the percentage of transient tension and partially masculinizes EMG potentiation in both sexes. Asterisks indicate a significant difference between groups. NS indicates no significant difference between groups.
