The neuropsychological features of the primary progressive aphasia (PPA) syndromes continue to be defined. Here we describe a detailed neuropsychological case study of a patient with a mutation in the progranulin ("GRN") gene who presented with progressive word-finding difficulty. Key neuropsychological features in this case included gravely…

Study of a one-year-old's earliest use of prepositions found that spatial oppositions ("up-down") were learned first, and used in non-prepositional senses prior to prepositional usage. "With,""by,""to,""for,""at," and "of" were learned later and used to express case relationships and more often misused and omitted than the earlier-learned…