superior Colliculi

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Colliculi, superior 

Two small rounded elevations situated on the dorsal aspects of the midbrain, just below the thalamus. Besides receiving fibres from each other, they receive a small number of axons from the optic tracts and serve as a relay centre for movements of the eyes, head and neck in response to visual and other stimuli. Singular: colliculus. Syn. superior corpora quadrigemina. See brachium; retinotectal pathway; pretectum; Parinaud's syndrome.
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