Copyright © American Speech-Language-Hearing Association From: Motor Speech Phenotypes of Frontotemporal Dementia, Primary Progressive Aphasia, and Progressive Apraxia of Speech J Speech Lang Hear Res. 2017;60(4):897-911. doi:10.1044/2016_JSLHR-S-16-0140 Legend: Speech characteristics of nonfluent-variant primary progressive aphasia (red), logopenic-variant primary progressive aphasia (blue), semantic-variant primary progressive aphasia (purple), behavioral-variant frontotemporal dementia (green), progressive apraxia of speech (yellow), and primary progressive apraxia of speech (brown). Speech characteristics were included where more than 80% of studies which tested that measure found a statistically significant difference from a healthy group. PVI = pairwise variability index; MSR = maximum speech rate. Date of download: 11/12/2017 Copyright © American Speech-Language-Hearing Association