Abstract
Caloric vestibular stimulation: interaction between somatosensory system and vestibular apparatus
Highlights
Spatial and bodily representations are multisensory processes that imply the integration of several afferent signals into a coherent internal model of our egocentric space
In right brain-damaged patients, caloric vestibular stimulation (CVS) produces a temporary recovery of visuo-spatial neglect and associated symptoms, such as representational and personal neglect, anosognosia, somatoparaphrenia and motor neglect
CVS influences tactile perception: cold CVS delivered on the left ear transiently reduces tactile imperception in both right and left brain-damaged patients (Vallar et al, 1990, 1993; Bottini et al, 2005)
Summary
Spatial and bodily representations are multisensory processes that imply the integration of several afferent signals into a coherent internal model of our egocentric space. CVS influences tactile perception: cold CVS delivered on the left ear transiently reduces tactile imperception (hemianesthesia) in both right and left brain-damaged patients (Vallar et al, 1990, 1993; Bottini et al, 2005). The reversed stimulation (i.e., right ear cold CVS) is ineffective in left braindamaged patients with the interesting exception of left brain-damaged patients with right visuo-spatial neglect (Vallar et al, 1993).
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