Use of the Visual Object and Space Perception (VOSP) test battery in two cases of posterior cortical atrophy

Two patients presenting with predominantly dorsal posterior cortical atrophy were evaluated using the Visual Object and Space Perception (VOSP) test. The objective was to determine whether the VOSP was useful to discriminate damage to the ventral and the dorsal visual pathways. Both patients failed almost all the VOSP subtests, and the battery did not permit confirmation of the integrity of the ventral pathway. In addition, certain subtests evaluating dorsal function were nearly completed, probably due to a compensation strategy. Thus, evaluation using VOSP does not discriminate between predominantly ventral and predominantly dorsal clinical forms of posterior cortical atrophy.