Figure 2
From: Early auditory responses to speech sounds in Parkinson’s disease: preliminary data
(a): Fast Fourier transforms calculated for the vowel part of the average response of individuals with PD (red) and age- and gender-matched control (black) group. (b) Bar graphs demonstrating between-group differences in response amplitude corresponding to fo (80–120 Hz) and F1 (400–600 Hz) representation of the speech stimuli. The error and shaded error bars represent the standard error. Note: *p < 0.01.
