Dorsal visual cortex activity elicited by posture change in a visuo-tactile matching task.
To investigate the process of crossmodal spatial recognition, we examined the effect of posture change on the recognition of a tactile stimulus position. The task was to judge whether a visual and a tactile stimulus, presented to the left or right, were on the same or different sides while subjects crossed or uncrossed their hands. Under a condition which removed the effect of response bias to the left and right, the dorsal visual cortex (area 18/19) and the precuneus were more activated in the crossed hands condition. The dorsal visual cortex activation suggests that the activity of brain areas classically considered to be visual cortex is affected by posture change, and reflects the reciprocal process across different modalities in spatial recognition.
Misaki
Masaya
M
Brain Function Group, Kansai Advanced Research Center, Communications Research Laboratory, Hyogo, Japan. misaki@po.crl.go.jp
Matsumoto
Eriko
E
Miyauchi
Satoru
S
D000328:Adult; D001288:Attention / Q000502:physiology; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009483:Neuropsychological Tests; D009949:Orientation / Q000502:physiology*; D010296:Parietal Lobe / Q000033:anatomy & histology / Q000502:physiology; D010775:Photic Stimulation; D010812:Physical Stimulation; D011187:Posture / Q000502:physiology*; D011434:Proprioception / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D014110:Touch / Q000502:physiology*; D014793:Visual Cortex / Q000033:anatomy & histology / Q000502:physiology*; D014795:Visual Pathways / Q000033:anatomy & histology / Q000502:physiology*