@article{Martínez1999,
	title = {Involvement of striate and extrastriate visual cortical areas in spatial attention},
	author = {A. Martínez and L. Anllo-Vento and M. I. Sereno and L. R. Frank and R. B. Buxton and D. J. Dubowitz and E. C. Wong and H. Hinrichs and H. J. Heinze and S. A. Hillyard},
	journal = {Nature Neuroscience},
	pages = {364 - 369},
	year = {1999},
	biburl = {http://www.bibsonomy.org/bibtex/27a40bd0d9c3abd515602e4611d20891e/tmalsburg},
	abstract = {We investigated the cortical mechanisms of visual-spatial attention while subjects discriminated patterned targets within distractor arrays. Functional magnetic resonance imaging (fMRI) was used to map the boundaries of retinotopic visual areas and to localize attention-related changes in neural activity within several of those areas, including primary visual (striate) cortex. Event-related potentials (ERPs) and modeling of their neural sources, however, indicated that the initial sensory input to striate cortex at 50−55 milliseconds after the stimulus was not modulated by attention. The earliest facilitation of attended signals was observed in extrastriate visual areas, at 70−75 milliseconds. We hypothesize that the striate cortex modulation found with fMRI may represent a delayed, re-entrant feedback from higher visual areas or a sustained biasing of striate cortical neurons during attention. ERP recordings provide critical temporal information for analyzing the functional neuroanatomy of visual attention.},
	keywords = {-23PAttention attention ekp feedbackconnections fmri primaryvisualcortex vision }
}