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. 2023 Sep 28;147(2):607–626. doi: 10.1093/brain/awad327

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Patterns of brain tissue loss associated with agrammatism in nfvPPA. (A) Expressive agrammatism effect from VBM Analysis 2a. (B) Expressive agrammatism effect from VBM Analysis 2b (i.e. co-varying out variance unrelated to morphosyntactic encoding). (C) Receptive agrammatism effect from VBM Analysis 3a. (D) Receptive agrammatism effect from VBM Analysis 3b (i.e. co-varying out variance unrelated to morphosyntactic decoding). Images are shown in neurological orientation. nfvPPA = non-fluent/agrammatic variant of primary progressive aphasia; VBM = voxel-based morphometry.