Target selection and the superior colliculus: goals, choices and hypotheses.

摘要: The intermediate and deep layers of the superior colliculus (SC) compose a retinotopically organized motor map are known to be important for control saccadic eye movements. However, recent studies have shown that functions SC not restricted saccades. pattern activity observed during multi-saccade movements, combined eye-head pursuit movements argue in indicates location goal, but does specify particular will used acquire goal. Prior onset movement, is involved representing possible targets, as has been by effects manipulating target probability changes pre-motor found visual search tasks. A major unresolved issue how target-related transformed into signal triggers movement. One possibility levels across correspond likelihood movement decision based on neural equivalent hypothesis testing. In one version this mechanism, select new goal would occur each time null hypothesis, represented neurons rostral SC, was rejected favor an alternative elsewhere SC.