In natural viewing conditions the spatial position of an observer relative to an object is defined simultaneously according to multiple reference frames, egocentric and allocentric. Which brain areas compute such spatial representations is a matter of debate.
The aim of this study is twofold:
1) identify the neuroanatomical bases of egocentric and allocentric spatial representations by means of an innovative combined behavioural-fMRI-MEG (Magneto-Encephalography) approach on normal and right-brain damaged subjects with hemispatial neglect;
2) rehabilitate egocentric and allocentric neglect through prismatic adaptation. Normal subjects will be scanned during spatial tasks designed to activate egocentric or allocentric spatial representations; subsequently, they will undergo MEG to assess the time course of the activation.
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