Supra- and infrasylvian conduction aphasia

Fifteen cases of conduction aphasia which were tested with the Aachen Aphas ia Test (AAT), are presented. The CT lesion data were transformed to a stan dard 3D-reference brain referring to the ACPC line. According to the lesion profiles a group of 6 patients had pure suprasylvian lesions, a group of 4 patients had pure infrasylvian lesions, and a group of 5 patients had lesi ons in both supra- and infrasylvian regions. Suprasylvian conduction aphasi cs are superior to infrasylvian conduction aphasics in the token test and i n repetition tasks. Infrasylvian conduction aphasics use more stereotypes i n spontaneous speech than suprasylvian conduction aphasics. Conduction apha sics with both lesion sites perform less well in tests of naming, writing, and comprehension than the pure types. Thus conduction aphasia is a heterog eneous syndrome anatomically and linguistically. (C) 2001 Academic Press.