 Work in which electrodes are used in vivo to stimulate areas of the macaque brain known to be associated with eye-movement coordination has provided strong evidence for the existence of an anatomical overlap between brain areas involved in eye-movement control and those involved in determining which stimuli elicit the strongest responses in visual cortex. There is also evidence that this anatomical fact has some functional significance. One suggestive finding is that the links between frontal eye-movement-control areas and attention-like effects in occipital visual areas are spatially specific: an electrode that is placed so that it elicits an eye movement to a particular part of the visual field when activated at one level will, if activated at a lower level, elicit changes in neural responsiveness that are exactly similar to the changes that are seen when attention is shifted to that same location (Moore and Armstrong, 2003, Armstrong and Moore, 2007).