Behavioral and Brain Sciences

Open Peer Commentary

The human superior colliculus: Neither necessary, nor sufficient for consciousness?

Susanne Watkins a1 and Geraint Rees a1
a1 Wellcome Trust Centre for Neuroimaging and Institute for Cognitive Neuroscience, University College London, London WC1 N 3AR, United Kingdom.

Article author query
watkins s   [PubMed][Google Scholar] 
rees g   [PubMed][Google Scholar] 


Non-invasive neuroimaging in humans permits direct investigation of the potential role for mesodiencephalic structures in consciousness. Activity in the superior colliculus can be correlated with the contents of consciousness, but it can be also identified for stimuli of which the subject is unaware; and consciousness of some types of visual stimuli may not require the superior colliculus.

(Published Online May 1 2007)