Abstract:
:This study investigated if the neural mechanisms involved in processing distance (near and far) and frame of reference (egocentric and allocentric) can be dissociated. 36 participants completed a conjunction visual search task using either an egocentric (deciding if the target was to their left or right) or an allocentric (deciding if the target was to the left or right of a reference object) frame. Both tasks were performed in near (57 cm) and far (171 cm) space conditions. Participants were separated into three groups, and each received transcranial magnetic stimulation (TMS) to a different site; right posterior parietal cortex (rPPC), right ventral occipital cortex (rVO), or right frontal eye field (rFEF) in addition to sham TMS. The results show that rFEF is critical in the processing of each search at each distance whereas, contrary to previous detection results, TMS over rVO did not affect performance for any condition. TMS over rPPC revealed that specialised egocentric processing in the parietal cortex does not generalise to far space, providing evidence of a separation of the reference frame/distance conflation in the literature.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Lane AR,Ball K,Ellison Adoi
10.1016/j.neuropsychologia.2014.12.019subject
Has Abstractpub_date
2015-07-01 00:00:00pages
42-9eissn
0028-3932issn
1873-3514pii
S0028-3932(14)00479-5journal_volume
74pub_type
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