A few remarks on attention and magnocellular deficits in schizophrenia. Export

@article{citeulike:4899837, abstract = {In connection with schizophrenia, it has been proposed that the magnocellular system is specifically linked to the guiding of covert visual attention. The argument is that the magnocellular pathway provides input to the dorsal cortical stream which then projects back to area V1. We review problems with this model. (1) It requires that responses in the magnocellular system have a lead time over responses in the parvocellular system. However, measurements indicate that the actual response time difference between the two systems is small or negligible when entering the visual cortex. (2) Attention can be modified by stimuli that do not activate the magnocellular system. And, (3) lesions to area MT in the dorsal stream impair smooth pursuit eye movements, but not saccadic eye movements which are associated with shifts in attention. For these reasons, it is difficult to link attention defects in schizophrenia to potential magnocellular deficits.}, author = {Skottun, B. C. and Skoyles, J. R.}, citeulike-article-id = {4899837}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.neubiorev.2007.06.002}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/17651801}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=17651801}, doi = {10.1016/j.neubiorev.2007.06.002}, issn = {0149-7634}, journal = {Neuroscience and Biobehavioral Reviews}, keywords = {magnocellular, parvocellular, review, schizophrenia, vision}, number = {1}, pages = {118--122}, posted-at = {2009-06-19 04:39:15}, priority = {3}, title = {A few remarks on attention and magnocellular deficits in schizophrenia.}, url = {http://dx.doi.org/10.1016/j.neubiorev.2007.06.002}, volume = {32}, year = {2008} }

TY - JOUR ID - citeulike:4899837 L3 - citeulike-article-id:4899837 N2 - In connection with schizophrenia, it has been proposed that the magnocellular system is specifically linked to the guiding of covert visual attention. The argument is that the magnocellular pathway provides input to the dorsal cortical stream which then projects back to area V1. We review problems with this model. (1) It requires that responses in the magnocellular system have a lead time over responses in the parvocellular system. However, measurements indicate that the actual response time difference between the two systems is small or negligible when entering the visual cortex. (2) Attention can be modified by stimuli that do not activate the magnocellular system. And, (3) lesions to area MT in the dorsal stream impair smooth pursuit eye movements, but not saccadic eye movements which are associated with shifts in attention. For these reasons, it is difficult to link attention defects in schizophrenia to potential magnocellular deficits. IS - 1 JF - Neuroscience and Biobehavioral Reviews SN - 0149-7634 EP - 122 TI - A few remarks on attention and magnocellular deficits in schizophrenia. VL - 32 SP - 118 KW - magnocellular KW - parvocellular KW - review KW - schizophrenia KW - vision AU - Skottun, BC AU - Skoyles, JR PY - 2008/// UR - http://dx.doi.org/10.1016/j.neubiorev.2007.06.002 ER -