Show Reference: "Superior Colliculus and Visual Spatial Attention"

Superior Colliculus and Visual Spatial Attention Annual Review of Neuroscience, Vol. 36, No. 1. (2013), pp. 165-182, doi:10.1146/annurev-neuro-062012-170249 by Richard J. Krauzlis, Lee P. Lovejoy, Alexandre Zénon
    abstract = {The superior colliculus ({SC}) has long been known to be part of the network of brain areas involved in spatial attention, but recent findings have dramatically refined our understanding of its functional role. The {SC} both implements the motor consequences of attention and plays a crucial role in the process of target selection that precedes movement. Moreover, even in the absence of overt orienting movements, {SC} activity is related to shifts of covert attention and is necessary for the normal control of spatial attention during perceptual judgments. The neuronal circuits that link the {SC} to spatial attention may include attention-related areas of the cerebral cortex, but recent results show that the {SC}'s contribution involves mechanisms that operate independently of the established signatures of attention in visual cortex. These findings raise new issues and suggest novel possibilities for understanding the brain mechanisms that enable spatial attention.},
    author = {Krauzlis, Richard J. and Lovejoy, Lee P. and Z\'{e}non, Alexandre},
    doi = {10.1146/annurev-neuro-062012-170249},
    journal = {Annual Review of Neuroscience},
    keywords = {attention, sc, visual, visual-processing},
    number = {1},
    pages = {165--182},
    posted-at = {2014-04-09 13:54:26},
    priority = {2},
    title = {Superior Colliculus and Visual Spatial Attention},
    url = {},
    volume = {36},
    year = {2013}

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The SC may play a major role in the selection of stimuli—as saccade targets or as reaching targets.

The activity of an SC neuron is proportional to the probability of the endpoint of a saccade being in that neuron's receptive field.

A possible ascending pathway from SC to visual cortex through the pulvinar nuclei (pulvinar) may be responsible for the effect of SC activity on visual processing in the cortex.

There may be an indirect ascending pathway from intermediate SC to the thalamic reticular nucleus.

Activity of the SC affects activity in cortical regions.

In the Sprague effect, removing (or deactivating) one visual cortex eliminates visually induced orienting behavior to stimuli in the contralateral hemifield.

Lesioning (or deactivating) the contralateral SC restores the orienting behavior.

Responses of superficial SC neurons do not depend solely to intrinsic stimulus properties.

There seems to be an ascending pathway from superficial SC to the medial temporal area (MT) through the pulvinar nuclei (inferior pulvinar).