Abstract
Right-hemisphere-damaged (RHD) patients with contralesional neglect in the visual modality (n = 8) were found to differ from normal controls (n = 8), and also from RHD patients without visual neglect (n = 7), in their ability to identify auditory stimuli delivered through a loudspeaker on the left side. When the same stimuli on the left were administered in the presence of a fictitious source of sound (a dummy loudspeaker) visible in the homolesional space, a significant increase in the identification score was obtained (the ‘ventriloquist effect’). The result is in keeping with a notion of a strong coupling between auditory and visual systems. It is attributed to the activation by the fictitious stimulus of the audio-visual map in the left hemisphere. We draw attention to the possibility that the symptomatic relief associated with the above effect could be translated into certain clinical gains over time.
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