Abstract:
:The posterior parietal cortex (PPC) is a critical node in attentional and saccadic eye movement networks of the cerebral cortex, exerting top-down control over activity in visual cortex. Here, we sought to further elucidate the properties of PPC feedback by providing a time-resolved map of functional connectivity between parietal and occipital cortex using single-pulse TMS to stimulate the left PPC while concurrently recording fast optical imaging data from bilateral occipital cortex. Magnetic stimulation of the PPC induced transient ipsilateral occipital activations (BA 18) 24-48ms post-TMS. Concurrent TMS and fast optical imaging results demonstrate a clear influence of PPC stimulation on activity within human extrastriate visual cortex and further extend this time- and space-resolved method for examining functional connectivity.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Parks NA,Mazzi C,Tapia E,Savazzi S,Fabiani M,Gratton G,Beck DMdoi
10.1016/j.neuropsychologia.2015.10.002subject
Has Abstractpub_date
2015-11-01 00:00:00pages
153-8eissn
0028-3932issn
1873-3514pii
S0028-3932(15)30180-9journal_volume
78pub_type
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